S4W-Nepal

Water Induced Disaster In Nepal And The Role Of Citizen Scientist

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Dinesh Pathak
Central Department of Geology, Tribhuvan University
Kirtipur, Kathmandu, Nepal
Email: dpathaktu@gmail.com

Dinesh Pathak
Central Department of Geology, Tribhuvan University
Kirtipur, Kathmandu, Nepal
Email: dpathaktu@gmail.com

Abstract

This article focuses on the water-induced disaster (landslide and flood) conditions in Nepal. It analyzesThe past and present water-induced disaster conditions in the country haves been analyzed, the importance and means for creation of the database have been explored, identifies data gaps in water induced-disaster mitigation have been identified, explores the importance and means for creation of a database to house and organize data, visualizes the role of citizen scientists in data generation was visualized, and describes the efforts to date of S4W-Nepal there have been signified and described.

Introduction

The Himalayan region represents an active tectonic zone, and about 35% of the Himalayan belt lies in Nepal. The 147,515 km2 territory of Nepal can be divided into three main geographical regions; the Himalayan region covers 15% of the total area, the hilly region covers 68%, and Terai, also known as the food basket of the country covers 17% of the total area. The Himalayan terrain is formed by the complex geological process, which is still continuing to shape the Himalayan region. Such geological activities together with the hydrometeorological process have caused various types of hazards that eventually pose vulnerability to people, infrastructure, and natural resources. Thus, the larger population in the region has been exposed to multi-hazards, like earthquakes, landslides, soil degradation, flood, deforestation, loss of biodiversity, and drought. 

Water-borne disasters like landslides, floods, soil erosion are common during the monsoon period in the entire Himalayan region. Snow avalanches are common, and glacial lake outbursts occasionally occur in the Himalayan region. These disasters have a significant impact on the natural system, settlements, and infrastructure in Nepal. In the past decades, climate change has been observed worldwide. For the future, predictions indicate average temperature rise, change in precipitation patterns in space and time, melting glaciers, sea-level rise, etc. with a large band of uncertainty. Likewise, extreme drought, intense rainfall, severe flood events, etc. are also predicted to occur more often under climate change conditions. 

Different aspects of disasters like a landslide, dam outburst flood, the occurrence of landslides due to bank erosion by the river and slope instability, floods, and infrastructure failure causing landslides and floods, etc. are different sorts of water-induced disasters. Himalaya is extremely vulnerable to natural disasters due to its geology, steep slopes, high relief, and monsoon climates and among the different natural disasters, landslides are important geological events in many parts of the world (Pathak, 2016a).

Effect of past water induced disaster in the country 

Water induced disasters (Landslide and flood disaster) have greater and regular impacts among all other disasters, which is evident from the highest mortality (66%) for the period between 1990 and 2014 (Figure 1). 

Figure 1: Disaster mortality in Nepal between 1990 and 2014 (UNISDR, 2015) 

Several events of water-induced disasters have increased the number of deaths, displacement of large numbers of families with damages to thousands of houses. It is quite convincing that these disasters are the major disasters in the country with an eminent impact on the people. Nevertheless, the earthquake disaster has a much greater and long term impact on all sectors of life even though it happens in a longer time interval. Even a single earthquake event can have more death, destruction of houses and infrastructure, as well as greater economic losses than the total due to other disasters in several decades. 

The water induced disaster 

Landslide and debris flow

Landslides are common in all physiographic regions of Nepal, i.e. from the Chure range in the south to the Higher Himalayan region in the north. The analysis of landslide data in different regions of Nepal shows that in general, most of the landslides have occurred in elevation class between 500 m and 2000 m. Physiographically, landslide occurrence is more in Middle Mountain and High Mountain regions. Likewise, the topographic slope is another important factor for the occurrence of landslides, and the slope angle between 20 and 40 degrees is most sensitive for the landslide occurrence. Geologically, most slope instability issues are in Siwalik and Lesser Himalayan regions. Generally, we believe that the vegetation-covered areas are the stable ground; in contrast,  the analysis of the data shows that in most of the cases, landslides occur in the forest area. It indicates that the vegetation is effective to provide ground stability only against the shallow slope failure, while for the deep-seated failure plane, especially below the root zone of the vegetation, large scale landslides may occur with significant damages to the forest land that may impose risks to other elements like settlement, agriculture land, and infrastructure at the downslope. An analysis of landslide vulnerability in eastern Nepal shows that many landslides have increased vulnerability to forest followed by agriculture, settlement, and road (Figure 2). 

Figure 2: Elements at risk due to landslides (number of landslides is at Y-axis)

Google Earth’s image is useful for the rapid assessment of landslides in an area, and it is especially useful in the identification of large and disastrous landslides (Figure 3). Likewise, it is quite helpful to identify the earthquake-induced landslides through comparison between the images before and after an earthquake (Figure 4). Either a new landslide can be developed or the old inactive landslide could be triggered during an earthquake.

Figure 3: Landslide in (a) Okhaldhunga district located at Manebhanjyang Gaupalika; and (b) Sankhuwasabha district at Makalu Gaupalika

Figure 4: Damage to road from earthquake due to triggering of the old landslide as well as the development of a new landslide in Dhading (left image before the earthquake and right image after the earthquake) 

Flood

Flood is a common hazard that sometimes becomes a disastrous event due to its magnitude and presence of a large number of vulnerable elements. Such events are occurring both in the mountainous regions as well as in the Plain area. The rivers flowing through the Kathmandu valley have been heavily stressed due to encroachment as a result of urbanization.  The natural regimes of the rivers are not maintained to the required waterway and also the natural regime of the river is much affected. This is the reason that many regions in the Kathmandu Valley are experiencing flood problems in each monsoon period. The flood hazard map of the Kathmandu Valley shows that both the urban core areas, as well as newly urbanized areas are prone to flood problems (Figure 5).  

Figure 5: Flood hazard map of Kathmandu Valley. The deeper blue color shows deeper water level (Pathak et al., 2009).

Gaps in water induced disaster mitigation 

In order to address the growing vulnerability due to the water-induced disaster, proper understanding of the biophysical, social, and institutional components is required. The water-induced disaster mitigation (WIDM) has been given the prime importance from the government of Nepal, however, a mounting disaster-induced loss indicates that disaster risk reduction is far from getting its due share of attention and resources (Pathak 2016b). Lack of seriousness and accountability of the decision-making authority, unavailability of the adequate database, low priority, and insufficient fund allocation for the disaster related study are some of the issues related to the inefficiency of disaster mitigation. Pathak (2016c) has pointed out some of the important measures to be considered for effective water-induced disaster management, which are listed below:

  • A hazard map is not adequate for planning rather risk map is more useful
  • A comprehensive disaster database will be supportive for disaster management
  • Prioritization of the watershed based on the water-induced disaster will facilitate effective disaster management
  • Regular monitoring and effective early warning system will reduce disaster loss
  • Institutional strengthening with effective coordination and networking among government line agencies 
  • I/NGO should be given appropriate roles to work in coordination with the government in a supportive role. These organizations should work on various sectors as identified and prioritized by the government 
  • Get prepared for the worst

Conclusion

Landslide and debris flow, as well as floods, are the major water-induced disasters in Nepal. There are many stakeholders for effective disaster management, namely government, non-government organization, disaster experts as well as the local residents. The role and activities of those stakeholders are almost defined, however, the role of local residents is least brought to the mainstream of disaster management. Data required for disaster management are available on national, provincial, and district level. However, there is a scarcity of data (like precipitation and flood discharge) at the local level, especially at the community level. These data are required to assess the disaster condition and to develop models required for disaster management. The local residents can be trained and given the responsibility to measure the hydrometeorological data so that a comprehensive database can be formed at the community level. Besides, these citizen scientists can act as valuable messengers to the community regarding community awareness in disaster management. S4W-Nepal has realised the importance of citizen science and its activities are focused to bridge the gap. 

References

Pathak D, 2016a. Knowledge based landslide susceptibility mapping in the Himalayas. Geoenvironmental Disasters (2016) 3:8, DOI 10.1186/s40677-016-0042-0

Pathak D, 2016b. Water Induced Disaster Mitigation from Watershed Management Perspective in Nepal – An Example from Dobhan Khola Watershed, West Nepal. International journal of landslide and environment, vol. 4(1-3), 9-19.

Pathak D, 2016c. Water induced disaster mitigation in Nepal – present approach and way forward for effective water induced disaster mitigation from geological perspective. Disaster Review 2015, pp. 25-30. 

Pathak D, Gajurel AP, Dwivedi SK, Shreshta GB, 2009. Flood risk mapping in urban area using high resolution satellite imageries. Proceedings of international seminar on hazard management for sustainable development, 29-30 Nov, 2009, Kathmandu, Nepal, (organized by Department of Water Induced Disaster Prevention, Nepal Engineering College and Ehime University). Eds. H.K. Shrestha, R. Yatabe and N.P. Bhandary, pp. 233-244.

UNISDR, 2015. Global Assessment Report on Disaster Risk Reduction 2015: Nepal. UNISDR
Note: ‘Young Researcher’ Issue 3  – Sept 2020

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monsoon in Nepal

Monsoon in Nepal

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Rocky Talchabhadel
Researcher, Kyoto University
Board Member, S4W-Nepal

The word “Monsoon” comes from the Arabic word “mausim” which translates directly to ‘season’ in English. The monsoon season in Nepal and other parts of Central and Southeast Asia is characterized by a large seasonal shift in wind flow and direction accompanied by a dramatic increase in precipitation. Monsoon can be both boon and bane for inhabitants of this region. Extreme (heavy) precipitation during the monsoon season often results in major water-induced hazards such as floods, landslides, and debris flow. However, the monsoon season is equally important for agriculture and the economy. Lower than average monsoon precipitation, or even simply a later than average start date to the monsoon season, can have a disastrous impact on the nearly 3/4th of the population in Nepal that is dependent on agriculture. The nature of the monsoon precipitation – its amount, temporal variability, intensity, frequency of occurrence, and spatial variation is a major factor affecting agricultural potential. In Nepal between 1968 and the present, the average start and end dates for the summer monsoon are June 10th and September 23rd, respectively. Figure 1 shows the start and end dates, and average duration, during this period.

Figure 1: Monsoon onset (blue squares) and withdrawal (orange circles) and average onset and withdrawal (gray shaded area).

The country receives more than 80% of its annual precipitation during the monsoon season (Shrestha, 2000). Rice is a major food staple in Nepal. The planting of rice normally begins in early May in the hills and in June in the Tarai, the country’s food basket. The monsoon precipitation is directly linked with the growth of this rice crop and the country’s agriculture and in turn, the economy. This year (A.D. 2020) monsoon began in Nepal on the 12th of June. The monsoon season is characterized by not continuous but continual rain for a few days separated by rainless intervals. The long term temporal record of monsoon onset and withdrawal (Figure 1) shows a delayed monsoon withdrawal coupled with either altered or unchanged monsoon onset. The monsoon season is, in general, found to be longer in recent times. On average, six or seven monsoon depressions* (twice per month) move in every year, each corresponding to a period of about 17 days (Nayava, 1980). When the monsoon trough (a large depression) moves closer towards the foothills of Nepal (which we call active break-monsoon), heavy precipitation-related extreme events usually occur in parts, or across the whole, of Nepal. During such extreme precipitation events, floods (river floods, flash floods, urban floods) are likely to occur. The timing of flood/inundation and early warning mechanisms are crucial for effective mitigation of flood risks, along with mapping and understanding of flood-prone areas, which are, to some extent, predictable.

However, landslides and debris flow can sometimes even occur in unexpected areas. A recent example of a landslide followed by a debris flow at Kushma municipality, Parbat on June 13, 2020 highlights this point. The terrain, which never experienced a landslide before, experienced this, followed by a debris flow that was a devastating event affecting lives and property. Figure 2 shows a preliminary assessment of cumulative precipitation derived from hourly precipitation data of a satellite-based product, PERSIANN CCS (spatial resolution, 4 km) and the spatial location of landslide/debris flow before and after the event using Planet Imagery (spatial resolution, 3 m). 

Even a single event with intense precipitation for a short period can bring urban inundation, land/mudslides, or flash flooding. Therefore, it is high time to map potential hazards and prepare for worst-case scenarios. You can’t manage what you don’t measure.  Citizen-science based precipitation measurements can be used as a reference to calibrate and correct satellite-based precipitation estimates. Let’s measure.

                       Figure 2: Kushma municipality, Parbat landslide, and resulting debris flow.

Reference:

Nayava JL. 1980. Rainfall in Nepal. The Himalayan Review. Nepal Geological Society, 12.

Shrestha ML. 2000. Interannual variation of summer monsoon rainfall over Nepal and its relation to Southern Oscillation Index. Meteorology and Atmospheric Physics, 75: 21–28. https://doi.org/10.1007/s007030070012.

*Note: Monsoon depression: a depression that forms within the locations of relatively minimum sea level pressure in a monsoon region.

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Sagar Gosai

Meet Sagar Gosai and the Young Researchers’ Circle (YRC)

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Young Researchers’ Circle Announcement & Activities

The Young Researchers’ Circle (YRC) is a voluntary, independent, collaborative, non-profit circle of young researchers/students that was founded in Spring 2020 by S4W-Nepal with an aim to promote and support citizen science-based water resource monitoring and management in the Kathmandu Valley and other parts of Nepal. The motto and objective of YRC is “Rejuvenating research among young aspiring minds” and YRC seeks to accomplish this via events, outreach programs, involvement in S4W-Nepal’s activities, and various networking opportunities.

The current ongoing activities of YRC include participation in S4W-Nepal’s  Monsoon Expedition 2020, publication of a bi-monthly newsletter and a weekly Environmental News Refresher[1], and analysis of S4W-Nepal’s data. YRC plays a crucial role in the Monsoon Expedition in building a strong network of Citizen Scientists throughout the Kathmandu Valley (and other parts of Nepal) and motivates them to get involved in water-related research activities. YRC intends to build a good relationship between different colleges of Nepal, mobilize graduate-level students in water-related research, and help develop their skillset for the design, implementation, completion, and communication of research projects.

To date, YRC has published its first issue of the bimonthly newsletter ‘Young Researchers’ and six issues of the weekly Environment News Refresher. YRC has also conducted two online trainings, one on Open Data Kit (ODK) and one on ArcGIS, for the interested members of Young Researchers’ Circle for building their research skillset. Furthermore, YRC celebrated World Environment Day on June 5th by organizing an article writing competition among YRC members on the topic “Water as a whole to sustain biodiversity”. Finally, YRC has also conducted a video campaign in order to promote and conserve biodiversity.

In the near future, YRC plans to conduct webinars, facilitate managing and supporting conferences/events conducted by water-related organizations, become involved in various research activities and publications,  and more. The YRC initiative has thus far been successful, and these new ideas will hopefully allow for its continued success and growth!

You can find out more about the Young Researchers’ Circle through the S4W-Nepal Facebook page, by contacting S4W-Nepal at: s4w-nepal@smartphones4water.org  or by contacting YRC directly at youngresearcherscircle@gmail.com .

Sagar Gosai

Meet Sagar Gosai

Sagar Gosai has been an active citizen scientist with S4W-Nepal for a long time and recently became vice-secretary of the Young Researchers’ Circle. Let’s hear a little bit from him about his experience as a citizen scientist and with S4W-Nepal.

Citizen Scientist’s Story

Namaste, I am Sagar Gosai. I am a third-year bachelor’s student studying Environmental Science at Khwopa College, Bhaktapur. I am an enthusiastic youth with a keen interest in the field of drinking water quality and its management. I was motivated and inspired to be a citizen scientist and got involved with S4W-Nepal through an outreach program conducted at my college. I have been actively collecting daily precipitation data for more than two years now, and have also been collecting daily evaporation data for the past six months.

S4W-Nepal has developed a low-cost gauge (each costs about $1.50 for materials and construction) to record these measurements, and these gauges are initially made available to citizen scientists by the organization for free. Considering the plastic pollution issues happening both locally and globally, I really appreciate the idea of reusing and repurposing plastic water bottles for measurement as well as the cost-effective data transmission methods through mobile application Open Data Kit (ODK) Collect.  S4W-Nepal has made me aware of the importance of data collection and also helped me develop the capability to easily communicate with other fellow citizen scientists and local people about the data collection procedures and the importance of the data. I am very happy to be a part of S4W-Nepal and excited and eager to know how the data collected are being used in making wise water resource management decisions.

[1] The weekly Environmental News Refresher provides an overview of local, national, and international environmental news stories with some commentary.

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Citizen Science, S4W, S4W-Nepal

A Groundwater Quality Assessment of Bhaktapur Municipality using the Drinking Water Quality Index

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Rapid population growth, urban sprawl, and increasing developmental activities are leading to growing freshwater demands in the Kathmandu Valley. The limited availability of surface water has increased the people’s dependence on groundwater resources. Groundwater is an important source of drinking water in the Kathmandu Valley, contributing to roughly 50-70% of the total water supply (Chapagain et al., 2009). Unfortunately, the increasing extractions of groundwater have led to an abrupt decline in groundwater levels and also deterioration of groundwater quality. The variations in water quality are indicated by its physical, chemical and biological conditions, which are directly influenced by anthropogenic activities. These activities include introduction of untreated/partially treated wastewater, and excessive use of pesticides and chemical fertilizers in agriculture. The majority of people in Bhaktapur municipality in the Kathmandu Valley rely on groundwater   for everyday domestic uses, but the degradation of groundwater quality has put the sustainability of groundwater resources under severe threat. Therefore, monitoring of groundwater quality should be done regularly so that the associated risks from the pollutants can be identified, better understood, and ultimately reduced or eliminated.

Groundwater quality is a complex subject to address, and a difficult water parameter to assess and evaluate, since it needs to consider multiple physico-chemical and biological parameters. Depending on the audience, assessment, evaluation, and communication of results  is sometimes best done using a single metric that presents the information in simple terms. The water quality index (WQI) is one of the most effective ways of summarizing groundwater quality as it is a representative value reflecting the combined influence of various water quality parameters. WQI reduces the complexity of water quality data and presents the information in a simple and understandable manner to policymakers and concerned citizens. For those interested in specifics, the data inputs for determining the WQI can be evaluated individually.

A study was conducted by SmartPhones4Water Nepal (S4W-Nepal) to develop a WQI value in order to assess the groundwater quality of the Bhaktapur municipality. This study was performed as a part of a young researcher-led citizen science project called SmartPhones4Water (S4W) that was focused initially in Nepal (S4W-Nepal) and is now expanding into other areas. For data collection, 25 sample wells (both public and private) were selected from the entire municipality considering the spatial coverage and the human settlements. The samples were collected during the pre-monsoon (May), monsoon (July), and post-monsoon (November) time periods of 2018. 

Figure 2. Map of the study area with the locations of sample wells.

The public wells were typically open to the atmosphere, while the private wells typically had a covering. Groundwater samples were pulled up to the ground surface using a bucket and collected in 1 liter plastic bottles. The collected samples were subjected to a comprehensive analysis of 11 physico-chemical parameters including pH, electrical conductivity (EC), turbidity, total dissolved solids (TDS), total hardness, total alkalinity, chloride, phosphate, ammonia, iron, and nitrate. WQI was calculated by following the weighted arithmetic index method given by Brown et al., (1972)  from the parametric values obtained from the analysis of physico-chemical parameters. 

Figure 3. WQI results for study area from (a) pre-monsoon, (b) monsoon, and (c) post-monsoon sampling in 2018.

The WQI is expressed as a single number, with lower numbers representing better water quality and higher numbers representing poorer water quality. Numbers less than 25 are considered excellent quality, numbers between 25 and 50 are considered good quality, numbers between 50 and 75 are considered poor quality, numbers between 75 and 100 are considered very poor quality, and numbers over 100 are considered unsuitable for human consumption.

The WQI values in Bhaktapur municipality ranged from 23.03 to 943.15; the overall groundwater quality status of Bhaktapur municipality was determined to be of poor quality. 1.33% of water samples have excellent quality, 24% have good quality, 32% have poor quality, 13.33% have very poor quality and the remaining 29.33% were unsuitable for drinking purpose. The WQI values were found to be more sensitive to the parameters including turbidity, alkalinity and ammonia. The WQI distribution of sampling wells in pre-monsoon, monsoon and post-monsoon of 2018 is presented in figure 2. The seasonal fluctuation in water quality might be because of the monsoonal water influx and the dilution effect.

The reasons for the poor water quality of wells in the Bhaktapur municipality could be the cause of a variety of issues and influences. These include septic contamination, percolation of agricultural water containing pesticides and fertilizers, construction and demolition activities, and a direct influx of rainwater in open wells. In order to address any overland contamination, cover systems and regular maintenance and cleaning of the wells is recommended. The findings from this study may serve as an important foundation and frame of reference to guide future studies on the groundwater quality of the study area and efforts to improve water quality.

The three tables below include the water quality results for each of the wells from the three sampling periods and the resulting WQI values.

 Table 1: Water quality results for sample wells during pre-monsoon 2018

Sample  WellsPHEC (μS/cm)TDS(mg/L)Turbidity (NTU)Nitrate (mg/L)Ammonia(mg/L)Phosphate(mg/L)Chloride(mg/L)Iron(mg/L)Hardness (mg/L)Alkalinity(mg/L)WQI
W16.94592162100.20.0531.360.312834063.09
W26.8808380700.20.0562.720.321657048.28
W37.16483051451030.539.20.3192410312.8
W47.31282603204030.2113.70.3144290424.14
W57.3859404700.50.0562.72013651039.11
W67.37513537000.0547.04020821030.25
W77.11121527161030.290.160.3160280343.31
W87.1544256601.50.235.28012835036.08
W97.77123357030.247.04014483058.9
W106.814876992000.05109.8113635062.46
W117.21344632420310.50.3304630136.57
W127.710234811201.50.050.20.321651064.71
W137.3123157925030.50.50.344027099.64
W147.914937025030.80.5022423053.52
W158.3780367200.20.21016828023.03
W167.754625717101.50.050.50.37224063.18
W17121668784351000.50.50.50168250116.18
W188.866831410100.20.500.312088058.47
W198.2110852164103101152420191.77
W208.3129560934103101368270140.49
W219.111705502401.510.2013636078.2
W229.492143310251.5100.312032063.15
W239.1131962025751101152310121.84
W24912465866750.50.80024034054.87
W258.810214805100.50.050116857070.48

         

Table 2: Water quality results for sample wells during monsoon 2018

Sample  WellsPHEC (μS/cm)TDS(mg/L)Turbidity (NTU)Nitrate (mg/L)Ammonia(mg/L)Phosphate(mg/L)Chloride(mg/L)Iron(mg/L)Hardness (mg/L)Alkalinity(mg/L)WQI
W16.7742349190.2750.0531.3601845062.92
W27.4185987440.200.239.2038410038.77
W37.285340120100.0590.1601529059.25
W47.7272128951.5100.290.160.36450202.08
W57.575335430750.274.4801845034.8
W67.892143340.250158.801766036.31
W78.3186386380100139.202644062.2
W88.3107850750500.543.1201842037.08
W98.3106550181.5500.0531.360.314420061.88
W109940442120.275135.2801205054.99
W118.260428490.250143.120642539.36
W128.717468218325147.040.327213077.3
W138.6119356111100.854.880805029.78
W148.411255291075139.201043034.46
W158.71504707110.5500.843.120.31207065.29
W168.996545430.2750.843.1201364038.8
W178.7125759140500.866.6401763039.03
W188.51023481321.500.854.88116870117.73
W198.892143380100.547.0411127064.29
W208.494444420250.2101.9201367027.45
W218.682338751.5100.05113.680967037.68
W228128760530250.0535.2801444029.23
W237.968932410500.0562.720.31288034.36
W248.21078507201.500.0570.560.3969073.17
W258.387040934300.05125.440.39640106.77

  

Table 3: Water quality results for sample wells during post-monsoon 2018

Sample  WellsPHEC (μS/cm)TDS(mg/L)Turbidity (NTU)Nitrate (mg/L)Ammonia(mg/L)Phosphate(mg/L)Chloride(mg/L)Iron(mg/L)Hardness (mg/L)Alkalinity(mg/L)WQI
W17.544420919503039.2019230077.38
W27.6519244155251.50.0547.040248640319.46
W37568266741030.0550.960256560177.17
W47.771433616101.50.250.96032080070.8
W58.424611692530.523.52014435054.07
W67.67233405010.0582.32038466045.41
W77.970032931751154.88012841097.97
W87.77873702410030.886.240160250101.02
W97.5119556286103119.603521590227.14
W107.681738421251.50.890.16016860079.68
W117.7848399122530.8109.76012080076.33
W127.898046116101.51129.36012868072.31
W137.591943217530.890.16017657062.03
W147.81163547585010.8145.040160610154.31
W157.78554022801.50.2109.76016062088.21
W167.663830025251.50.258.8024845081.6
W177.7568267161030.566.64028058074.77
W186.91082509143010164.640408570301.11
W197.5738347406101.50980.3320460784.08
W207.896145219501.50.0586.24028843079.9
W217.710444911781030.531.2603521510391.14
W227.3972457412101.50.05160.725256590943.15
W237.591042846101.50.0574.4803201130133.71
W247.8463218991030.0543.120240660223.76
W257.71129531151010.2196035261072.64

References 

Brown, R.M., McClelland, N.I., Deininger, R.A. and O’Connor, M.F. (1972) A water quality index—crashing the psychological barrier. Indicators of environmental quality [online]. pp. 173-182. Available from DOI: 10.1007/978-1-4684-1698-5_15 [Accessed 7th September 2019]

Chapagain, S. K., Pandey, V. P., Shrestha, S., Nakamura, T. and Kazama, F. (2009) Assessment of Deep Groundwater Quality in Kathmandu Valley Using Multivariate Statistical Techniques. Water, Air, & Soil Pollution [online]. 210(1-4), pp.277–288. Available from DOI: 10.1007/s11270-009-0249-8 [Accessed 1st September 2019]

A Groundwater Quality Assessment of Bhaktapur Municipality using the Drinking Water Quality Index Read More »

Yurisha Duwal

Meet Yurisha Duwal

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Water is one of our most precious and indispensable commodities. Smartphones4Water (S4W)-Nepal generates the data necessary to support both water users and policymakers in making wise water management decisions. In the Kathmandu valley of Nepal, extreme population growth has led to stress on water resources; the project initiated by S4W-Nepal has the objective of collecting the data necessary to quantify these stresses so that effective solutions can be identified, developed and implemented. S4W-Nepal leverages “citizen scientists” for the measurement of different components of water (precipitation, evaporation, water level, etc.) through use of an Android smartphone application called Open Data Kit (ODK) Collect. For the measurement of precipitation and evaporation, S4W-Nepal provides a local rain gauge to the citizen scientists. This approach is rapidly scalable and cost effective in a developing country like Nepal.

We have 60+ citizen scientists taking daily precipitation measurements in different parts of the Kathmandu Valley, covering the Valley spatially. Included below is an interview with Yurisha Duwal, one of our citizen scientists taking daily precipitation and evaporation measurements. Each citizen scientist has their own story and unique perspective to share. Keep reading to learn about her experiences working as a citizen scientist with S4W-Nepal, some of her personal interests, and some of her other thoughts.

CS_Interview

Yurisha Duwal is a bachelor’s student studying to become a pharmacist at Little Angels College of Health Science. Since she is in her final year, her daily activities are very concentrated on academics, however, she has a keen interest in and really enjoys dancing and singing. Besides that, she loves travelling to new places and has so far explored the central and eastern parts of Nepal (Janakpur, Sauraha and Chitwan) and Darjeeling and Sikkim of India. She got involved in S4W-Nepal through one of her friends and learned more about our work through our website and social media (Facebook and Instagram).

In her interview, Duwal said ‘Data is an important aspect for management of any resource! Here, in this case, it’s water!’. She believes the water-related data collected by S4W-Nepal and citizen scientists will ultimately help in sustainable water resource management in the near future. She further added, ‘I had no idea about the citizen science concept. I thought citizen scientists should come from a scientific background with good academics at first. However, being a part of S4W-Nepal, I came to understand this modern concept of citizen science and became fascinated by it.’ Being a medical student, she was not related to the water resources field academically, however, as a responsible citizen, she believes it’s her duty to be aware and take care of the environment she lives in. She added, ‘I will always be happy to contribute to the environment from my side, whether that be a small contribution like data collection or any other contribution. This is one of the key factors that drove me to become a part of S4W-Nepal’. She further encouraged her friends to become citizen scientists and become aware of the importance of data collection. Additionally, Duwal is one of only a few citizen scientists taking evaporation measurements, which we think is fantastic and really appreciate.

She believes that to accomplish or achieve any goal (in this case, sustainable water resource management), huge actions are not mandatory; small actions by many can help achieve and contribute to a better change. A lot of little things added together can turn out to be a pretty big thing. Adding this idea to the message she shares with others, she tells her fellow citizen scientists and friends that even a single measurement and data point can make a huge difference and can bring a significant change in the field of research and implementation of more sustainable management strategies. She further encourages everyone to continually collect and send data.

Nepal is a developing country where expensive technologies and environmental monitoring equipment and methods are not affordable. In such an instance, Duwal appreciates the cost-effective initiative taken by S4W-Nepal in mobilizing citizen scientists, mobile technologies and young researchers in data collection. However, she also suggests that measures to enhance the data collection techniques looking forward into the implementation of sustainable management strategies will be an interesting project and thing to think of. Since thus far, S4W-Nepal has mostly focused on the Kathmandu Valley, she added that this interesting and fascinating concept should be introduced all over the rest of Nepal too.

Each day, Yurisha Duwal uses an Android application called Open Data Kit (ODK) collect to record rainfall and evaporation. These measurements are recorded using a locally made inexpensive gauge (each gauge costs about $1.50 USD, learn how to make your own here). Each gauge is provided to citizen scientists by S4W-Nepal for free.

S4W = young researchers + citizen scientists + mobile technology. Citizen science refers to collaborations between scientists and general people to fill important scientific data gaps and expand the horizon of scientific data collection. S4W-Nepal uses an Android application called Open Data Kit (ODK) for data collection with the help of citizen scientists. The advanced mobile technology with good GPS and camera have improved the reliability and accuracy of citizen science observations. The citizen science approach is cost effective and rapidly scalable.

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Monsoon Expedition 2019

Monsoon Expedition 2019

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The growing imbalance between water demand and supply has stressed the quality and quantity of the water resources in the Kathmandu Valley of Nepal. Haphazard urbanization along with a lack of integrated land use planning has both affected surface water and restricted the recharge potential of the underlying groundwater resources. Precipitation is the only way of recharging surface and groundwater sources (including streams, springs, wells and stone spouts), and the Valley receives 80% of its total rainfall during monsoon (i.e. from June to September). If you’re not sure what a stone spout is, you should read one of our older stories here! Roughly two-thirds of the cultivable land in Nepal is rainfed rather than irrigated, so uneven and erratic rainfall patterns also severely affect the agricultural productivity of the country (Malla, 2008). There is a large issue to be addressed here. However, for effective planning and management of these water resources, the critical first step is that the problem needs to be characterized and better understood. Then, all relevant information should be forwarded to concerned stakeholders and decision makers for responsible action and wise management decisions.

One of S4W-Nepal’s  major objectives is generating good spatio-temporal hydro-meteorological data (e.g. when and where is water moving, and how much, and of what quality) as part of the critical first step mentioned above; these data are necessary to support wise water management decisions. To this end, S4W-Nepal has launched the Monsoon Expedition 2019 with a slogan “Count the drops, before it stops!”. For data generation, S4W-Nepal leverages the power of young researchers, citizen science, and mobile technology. We use an Android smartphone application called Open Data Kit (ODK) Collect to measure different components of water (e.g. precipitation, water flow, water quality, etc.) with the help of citizen scientists (CS). Advances in mobile technology through increased GPS accuracy and high-resolution cameras have undoubtedly improved the accuracy and reliability of citizen scientists’ observations. For measuring precipitation of the Valley, S4W-Nepal uses a local rain gauge constructed of readily available repurposed materials costing less than a dollar and we provide it to CS for free. This approach is both lower in cost and more rapidly scalable than other traditional methods of measuring precipitation. This story will focus on various aspects of our Monsoon Expedition 2019. It is currently ongoing, and we hope you enjoy this little glimpse into what we do 🙂

Aspects of Monsoon Expedition 2019

Citizen Scientist Recruitment

Almost all CS are recruited by one of three methods: through personal contacts and word-of-mouth, through outreach programmes and through social media (using Google Forms). We’ll describe the outreach programmes in more detail. As a part of the monsoon expedition this year, S4W-Nepal conducted two outreaches in the Valley leading up to the monsoon season for Bachelor’s level and graduate level  university students. The group from one of these outreaches is pictured below in Figure 1. The main purpose of these was to raise awareness among university students about current water-related issues, possible management measures and the importance of data for informing management decisions. The outreach programmes have been a good opportunity to share our ongoing research  and what we’ve learned through the process. Finally, we also provide a platform for all who attend the outreach programmes to participate in data collection. This year we have dozens of Nepali and foreign undergraduate and graduate students involved as volunteers and interns discussing water-related issues that the Valley currently faces and hopefully assisting in a step towards better water management.

Figure 1: Outreach program at Kantipur Engineering College (KEC) in May, 2019; Bachelor’s level engineering students participated 

Citizen Scientist Motivation

Motivation is one of the most important driving factors for CS; it is critical for keeping their interest alive and a high continuation rate in data collection. Some of the actions we take to help motivate CS include sending weekly acknowledgement texts to CS every Friday that encourage them and show the incredible positive impact they can have just through data collection. Social media has also been a good medium for the spread of news and necessary information to our targeted audience. We often disseminate data collected and sent in by our CS through social media, whether it is regarding a major rainfall event or any campaign findings.

Citizen Scientist Follow Up

This year during Monsoon Expedition 2019, we have the goal of conducting  immediate follow-up calls to CS after quality control of their data to reduce the repetition of mistakes (if any) and also to thank and encourage them for taking regular measurements. Also, we are planning to do bi-weekly or weekly follow up with CS if there is any sort of discontinuation in the data set and perform field visits if necessary in urgent cases.

Spatial distribution of Precipitation CS in the Valley in 2019

As of the beginning of June 2019, about 60 CS were recruited via the three  recruitment methods listed in the Recruitment section to cover a large portion of the Valley (Figure 2). The areas that we are focusing on are primarily the ones having Department of Hydrology and Meteorology (DHM) stations. During the 2018 monsoon, we attempted to recruit as many CS as possible and collect as much data as possible.  In 2019, we are shifting our focus towards a focus on data quality rather than quantity. Our goal is that good and reliable spatio-temporal precipitation data could be generated and used to inform water management decisions in the future.

We also love getting to know our CS through working together, and we want you to get to know them as well, because they’re great! Every so often, we publish an interview or story about one of our citizen scientists as well. Our most recent one is available here.

Thank you for taking an interest in our work and reading about what we’re up to this summer as part of Monsoon Expedition 2019!!

Figure 2: Spatial distribution of citizen scientists measuring precipitation in the Kathmandu Valley in 2019.

References

Malla, G. (2008) Climate change and its impact on Nepalese agriculture. Journal of agriculture and environment. 9, pp.62-71.

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Citizen Scientist

Citizen Science: Enabling normal people to contribute in scientific research and resource management!

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Water is one of our most precious and indispensable commodities. Putting our favorite Lord Kelvin phrase into action (‘You can’t manage a resource you don’t measure’), SmartPhones4Water (S4W)-Nepal generates data to support students, researchers and policymakers in making wise water management decisions. Extreme population growth has led to stress on the water resources of the Kathmandu Valley, and the project initiated by S4W-Nepal has the objective of collecting the data necessary to quantify these stresses and inform sustainable water management, so that effective solutions can be developed and implemented. Although we began in the Kathmandu Valley, S4W-Nepal has recently been expanding efforts and data collection into other regions of Nepal as well.

Included below is an interview with Sadam Bala, one of our citizen scientists taking daily precipitation measurements. Each citizen scientist has their own story and unique perspective to share. Let’s see what some of his personal interests, experiences working as a citizen scientist in S4W-Nepal and other thoughts are.

Fig: Citizen Scientist

Currently working at Nepal Electrical Authority (NEA) in Pokhara as an Electrical Engineer, Sadam Bala was born and raised in Bhaktapur. He completed his Bachelor’s in Electrical Engineering at the Institute of Engineering (IOE), Pulchowk Campus, which is one of the most prestigious engineering colleges in Nepal. Along with his work, he is currently enrolled in Western Regional Campus in Pokhara, pursuing his Master’s in Distributed Generation. Besides academics and work, his personal interests are travelling to new places and up to now, he has travelled several districts of Bagmati, Gandaki, Dhaulagiri and some parts of the mid and far-western regions of Nepal. He looks forward to continuing to travel and explore new places! He loves exploring and learning about new things and the modern concept of ‘citizen science’ fascinated him and drew him into being a part of S4W-Nepal.

It has been a year since Bala became involved in S4W-Nepal as a citizen scientist taking daily precipitation measurements. He is one of only a few citizen scientists from Pokhara. In his interview, Bala said, ‘Data collection is the basis for scientific research.’ He believes effective and informative research is an outcome of good data, and good data is also the basis for appropriate management of natural resources (including water!) both in the present and looking to the future. He further added, ‘It is not a tough job to take a picture and send data through a mobile application. It only takes a few minutes a day, not at all time consuming’.  He feels happy to be able to participate in scientific research with minimal effort.  Bala was aware of the importance of the citizen science concept as in his interview he highlighted citizen scientists as a critical part of research. Through S4W-Nepal, he has learned about existing problems and data gaps in the water resources field and how citizen scientists can reduce or eliminate those data gaps.

To his fellow citizen scientists, he conveys a message that these types of projects help an individual learn new and interesting things and can make them aware of existing problems that need to be addressed. Besides, citizen science projects can help built a network among individuals with different experience and backgrounds, which can be crucial in their personal development as well as for overall community or nation-building in the long run. From his personal experience, he suggests that his fellow citizen scientists be dedicated, self-motivated and work selflessly as the work is important and only requires a few minutes each day.

Each day, Sadam Bala uses an Android application called Open Data Kit (ODK) to record rainfall collected by an inexpensive locally made rain gauge (each gauge costs about $1.50 USD). Bala is motivated to participate in the project because he is fascinated by the citizen science concept, and he understands that data collection is a very important part of scientific research. Because of this, he is also eager to participate in large scale data collection in the near future if any opportunities are available.

Citizen science helps ordinary people increase their scientific understanding. All it takes is a smartphone with good GPS, a camera and access to the Internet to deinstitutionalize science and help the inner scientist in all of us grow, learn, and participate in scientific work on a broader scale. It gives every one of us opportunities for better understanding of a variety of subject matters, from water resources to backyard birds to the time of year that flowers are in bloom.

YOU CAN BE A CITIZEN SCIENTIST TOO!!!!

S4W = citizen science + mobile technology + young researchers. Citizen science refers to collaborations between scientists and general people to fill important scientific data gaps and expand the horizon of scientific data collection. S4W-Nepal uses an Android application called Open Data Kit (ODK) for data collection with the help of citizen scientists. The advanced mobile technology with good GPS and camera have improved the reliability and accuracy of citizen science observations. The citizen science approach is very cost effective and rapidly scalable.

Citizen Science: Enabling normal people to contribute in scientific research and resource management! Read More »

Citizen Science 2018 Pre-Monsoon Flow Campaign

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Figure 1. Citizen Science Participants at First Training.

In April of 2018, S4W-Nepal launched its first ever Pre-monsoon Citizen Science Flow Campaign. The main objective of this campaign was to assess the spatial variations in discharge of Bagmati River and its tributaries within Kathmandu Valley using the salt dilution technique (there are many variations of this technique, but more information on the technique we utilized can be found here). Since the primary source of water recharge in Kathmandu Valley is from the monsoon precipitation, which only lasts for about four months (roughly from June to September), we decided it would be interesting to see the pre- and post-monsoon variation of discharge in the rivers and springs of Kathmandu Valley. Additionally, even without monsoon precipitation patterns, the diverse geology of this small valley will have an influence on the spatial variability of discharge. It is another factor to consider in our investigation into spatial variation.

We believe that this research will further understanding of water availability within the Kathmandu Valley and enable water managers to make better decisions in the future.

Figure 2: Sub-watersheds of Kathmandu Valley.

Twenty-five students from the Khwopa College of Engineering in Bhaktapur were mobilised in ten different watersheds (Figure 2) of the Kathmandu Valley. In total, across all the watersheds, discharge was measured at more than 150 locations (Figure 3). Since the salt dilution technique is only suitable for high-gradient well mixed rivers with low Electrical Conductivity (EC), measurements were only performed in upstreams of rivers with River Quality Classes (RQC) ranging between I and III. Click here to review a recent publication in which we classified the RQC of all nine perennial tributaries of the Bagmati River using the Rapid Stream Assessment (RSA) technique. We are currently working on processing and analyzing these data, and we hope to include them in a peer-reviewed research article in the future. Additionally, S4W-Nepal is currently developing an online web application that will be used to house and provide data collected through S4W-Nepal efforts such as this. Once it is complete, these data will be uploaded and freely available for the benefit of all.

Figure 3. Salt Dilution Measurement Locations within the Kathmandu Valley.

Our sincere thanks goes to Khwopa College of Engineering for providing us with a group of enthusiastic young researchers to successfully complete this campaign; photos from our training on the salt dilution technique can be seen below (Figure 4). We hope this campaign and the hands-on field experience allowed participants to go beyond their practical, classroom lessons on the subject of “Hydrology” that they had recently completed. Completing this campaign was another milestone for S4W-Nepal towards furthering our three pronged approach of Research, Education, and Employment.

Currently, water resource management is one of the key issues for the Kathmandu Valley. Water resources could be managed properly through spatial and temporal quantification of water quality and quantity. Usual methods of streamflow measurement included installation of water level loggers, streamflow measurement by velocity meters, stage-discharge relationships, etc. However, these methods require trained professionals and significant funding, and they are difficult to apply at a large scale. With recent advances in mobile technologies, data collection efforts that take advantage of citizen scientists and mobile technology can be more easily applied at a larger scale. S4W-Nepal aims to combine citizen science with simple data collection techniques to generate spatially distributed hydrological data. You can find out more about our work at our website here.

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Citizen Scientist Story

Meet Sabina Tamang (Citizen Scientist Story)

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Happy Boxing Day Everyone!

This is our fourth interview with one of our citizen scientists who are collecting the data and doing the day-to-day work that makes our project in the Kathmandu Valley possible. We’re excited to introduce you to Sabina Tamang!

Fig1
Figure 1. Sabina with her daughter Aifa.

Q: What is your name?  A: My name is Sabina Tamang. 

Q: How old are you?  A: I’m 25 years old.

Q: Where were you born?  A: I was born in Okhreni, Sundarijal in the Kathmandu Valley.

Q: Where do you live in the Kathmandu Valley?  A: I live in Okhreni, Kathmandu.

Interviewer’s Note: Okhreni is located about 15 kilometers northeast of Nepal’s capital, Kathmandu, within Shivapuri National Park. Since it is located within a National Park, it still lacks basic infrastructure such as concrete houses, proper roads, shops, etc. Okhreni is a very important cultural site since it is near natural (i.e. still undeveloped) and located in the headwaters of the Bagmati River.

Q: Can you walk us through a typical day of life? What are the activities you’re doing?  A: In addition to being a mother and keeping a household, I am involved in S4W as a citizen scientist, and I have been taking precipitation and water level measurements for the past two years.

Interviewer’s Note: S4W-Nepal is thankful for the opportunity to provide part-time employment opportunities to people like Sabina in a way that provides supplemental income and adds value to their lives, as well as improving our understanding of Nepal’s water resources. It’s a win-win!

Q: Can you tell us a little bit about your family?  A: I have one daughter, Aifa, who is three and a half years old.  I live with her and my mother.

Q: What is (or was) your favorite subject in school?  A: Nepali was my favorite subject.

Q: Can you tell us about a favorite moment of yours?  A: My favorite moments of my life are from my school days…

Q: How did you hear about the S4W-Nepal project?  A: I heard about S4W-Nepal through another citizen scientist named Sumina Tamang. She who lives in Mulkharka, on the other side of Shivapuri National Park.

Figure 2. Spring at Okhreni.

Q: What has been your experience as a citizen scientist with S4W so far?  A: As I mentioned before, I have been collecting precipitation and water level data for about two years. I have started noticing changes in the measurements I take throughout the year. I can now explain to people about base flow and runoff of rivers in my area. I have also started to understand the importance of the monsoon. I am also getting a stipend which motivates me in continuing to participate in the project. This project has helped me in boosting my knowledge about local resources as well as my economic condition.

Sabina is playing a critical role in S4W-Nepal as a citizen scientist and is one of the longest standing CS involved in our team.  Each day,  she uses an Android application called Open Data Kit (ODK) to record rainfall collected by an inexpensive locally made rain gauge (each costs about $1.50) and to record water level as seen on a gauge installed  near her house. Sabina is one of the citizen scientists who sends data regularly and is very dedicated in her work. She is motivated to participate in the project both because she feels a sense of responsibility and because she is financially compensated for her participation.  

S4W-Nepal is a collaboration between S4W-USA, Himalayan Biodiversity and Climate Change Center (HimBioCliCC), Tribhuvan University Institute of Engineering (TU IoE), Kathmandu Institute of Applied Sciences (KIAS), Delft University of Technology, the Swedish International Development Agency, and Stockholm University.  Water is our most precious resource.  Lord Kelvin, a famous Scottish mathematician, once said, “you can’t manage a resource you don’t measure.”  S4W-Nepal’s goal is to generate the data necessary to support wise water management decisions. S4W aims to accomplish this with a three-pronged approach of Research, Education, and Employment. This project in the Kathmandu Valley is our first project.

story stories with moral

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