Saroj Kumar Chapagain

Saroj Kumar Chapagain
United Nations University (UNU) | UNU · Institute for Integrated Management of Material Fluxes and of Resources (UNU-FLORES)

PhD Intergrated River Basin Management

About

44
Publications
22,493
Reads
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682
Citations
Citations since 2017
22 Research Items
490 Citations
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2017201820192020202120222023020406080100120140
2017201820192020202120222023020406080100120140
Introduction
Saroj received his Ph.D. in Integrated River Basin Management (2009) from the University of Yamanashi (Japan), and Master degree in Physical Land Resource Management (2005) from Ghent University (Belgium). He worked as a post-doctoral researcher at ICRE, Japan, Senior Researcher at CREEW, Nepal, and Research Specialist at Asian Institute of Technology (AIT), Thailand. Currently, he is working as Research Fellow at United Nations University (UNU), Tokyo. He has authored more than dozen papers, and his research interests is on water and sanitation.
Additional affiliations
May 2012 - April 2018
Asian Institute of Technology
Position
  • Senior Researcher
Description
  • -Reinventing of toilet/on-site sanitation system - Field testing, monitoring and evaluation of new technologies - Prepare scientific manuscript, research proposal - Provide manegerial assistance to carrout overall project activities
April 2010 - April 2012
Center of Research for Environment Energy and Water (CREEW)
Position
  • Managing Director
Description
  • - develop organizational research strategic plan, policy and action - identify new research, and set out research plan - documentation, publications and database development of researches
October 2006 - September 2009
University of Yamanashi
Position
  • Student Assistant

Publications

Publications (44)
Article
Full-text available
An adequate water supply is essential for the continued and sustainable growth of the Balinese economy. In addition to mounting water demand, Bali’s water supply has been constrained by high levels of water pollution. Despite being paid great attention, Bali’s earlier efforts to control water pollution yet to prove effective, mainly owing to their...
Article
The newly enacted national water policy is envisioned as ensuring water sustainability in Nepal. Despite theoretical pertinence, questions remain about the effective implementation due to limited studies on key aspects of sustainability, such as water supply and demand, pollution, and impacts of climate change and socio-economic growth. This study...
Article
Full-text available
Wastewater-based epidemiology (WBE) is an approach that can be used to estimate COVID-19 prevalence in the population by detecting severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) RNA in wastewater. As the WBE approach uses pooled samples from the study population, it is an inexpensive and non-invasive mass surveillance method compared...
Preprint
Full-text available
An adequate water supply is essential for the continued and sustainable growth of the Balinese economy. In addition to mounting water demand, Bali’s water supply has been compromised by high levels of water pollution. Despite being paid great attention, Bali’s earlier efforts to control water pollution yet to prove effective, mainly owing to their...
Article
Full-text available
This paper aims to assess the influence of land use and land cover (LULC) indicators and population density on water quality parameters during dry and rainy seasons in a tourism area in Indonesia. This study applies least squares regression (OLS) and Pearson correlation analysis to see the relationship among factors, and all LULC and population den...
Article
Full-text available
This paper provides an extended input–output (IO) model of sectoral water consumption for Bali, a province located in Indonesia that is a well-known global tourist destination. Currently, the province is experiencing water shortages, which leads to a burden and heavy competition in water usage among the various economic sectors. We developed a meth...
Article
Full-text available
Nepal’s efforts to reduce manufacturing-related water pollution have faltered because they rely on traditional methods and regulation. We employed an environmentally extended input–output model to establish direct and indirect relations between water pollution and production in 19 Nepalese manufacturing sectors. We identify which are chief emitters...
Article
Full-text available
Bali has been open to tourism since the beginning of the 20th century and is known as the first tourist destination in Indonesia. The Denpasar, Badung, Gianyar, and Tabanan (Sarbagita) areas experience the most rapid growth of tourism activity in Bali. This rapid tourism growth has caused land use and land cover (LULC) to change drastically. This s...
Article
Full-text available
The soiling of solar panels from dry deposition affects the overall efficiency of power output from solar power plants. This study focuses on the detection and monitoring of sand deposition (wind-blown dust) on photovoltaic (PV) solar panels in arid regions using multitemporal remote sensing data. The study area is located in Bhadla solar park of R...
Article
Full-text available
For countries in Southeast Asia that mainly rely on surface water as their water resource, changes in weather patterns and hydrological systems due to climate change will cause severely decreased water resource availability. Warm weather triggers more water use and exacerbates the extraction of water resources, which will change the operation patte...
Poster
Despite being rich in fresh water resources, water shortage is a major issue in many parts of Nepal. The water use arrangements among various sectors are commonly institutionalized through the agreement between the water use activities, which seems to be more challenging under the changing socio-economic and political situation. The study examined...
Poster
Since the 1950s, the Government of India and the States Governments have invested large capitals in rural water supply with very positive outcomes. However, the intensification of industrial and human activities and the rising population growth are increasing competing demands on scarce water resources. While urban centers are coping with water sca...
Poster
Due to the rapid increase of land use in the Bali province, it follows that there would be a gradual effect on water quality since it has been widely agreed by the scientific community that there is a significant relationship between land use and water quality. To evaluate this association, this study examined the effect of spatial variation betwee...
Conference Paper
Water deficiency poses a severe threat to food security, and it creates an uncertainty that has to be overwhelmed in the process of socio-economic development of India. Therefore, it is needed to adopt water-saving irrigation technologies to avoid water scarcity in the future. This study explores the determinants influencing the adoption of water-s...
Article
Full-text available
Water remains a challenging issue for sustainable development. It remarks as the 6 th goal of Sustainable Development Goals (SDGs) by the United Nations (UN). UN targeted to increase water-use efficiency across all sectors and ensure sustainable withdrawals and supply of freshwater to address water scarcity and substantially reduce the number of pe...
Conference Paper
Full-text available
Water is a critical element that is needed to create and maintain jobs across all sectors of the country economies. In the Asian perspective, maximum of the industries driving economic growth depend upon a reliable supply of freshwater for large parts of their production processes and whereas, failure to secure an adequate and reliable supply of wa...
Article
Full-text available
Sanitation coverages in selected Southeast Asian countries, namely Myanmar, Thailand and Vietnam, were increased from 1990 to 2015. The toilet coverage of 96, 100 and 99% was reported in Myanmar, Thailand and Vietnam, respectively. On contrary, incidences of waterborne disease and water pollution are still in existence. This situation is due mainly...
Article
ACT is a widely used prescriptive drug for analgesic treatment. Due to incomplete conversion of ACT in the body, a significant portion of it is released with human excreta. Most wastewater treatment plants lack the efficiency to treat influent containing ACT residues. As a result, risk of surface and groundwater contamination has been increased. Co...
Article
Full-text available
The wide use of Acetaminophen (ACT) for pain relief and lack of ability of most wastewater treatment plants to treat ACT residues have increased the risk of surface and groundwater contamination. Constructed wetlands (CW) are a low cost technology for effective wastewater treatment to treat micro-pollutants through the roles of CW media such as ads...
Conference Paper
Full-text available
Excess use of pharmaceutical and personal care products (PPCPs), and its release as human waste has become a major challenge since most of the wastewater treatment options are not equipped to treat these micro-contaminants. Some advanced technologies are reported to be effective for PPCPs treatment in wastewater but cost of those technologies remai...
Article
Full-text available
Excessive use of pharmaceuticals and personal care products (PPCPs) and their release into the water environment have become a major challenge since most of the wastewater treatment options are not equipped to treat these micro-contaminants. Some advanced technologies are reported to be effective for PPCPs treatment in wastewater but cost of those...
Article
Since most of the existing wastewater treatment options lack the ability to treat micro-contaminants, the increased use of pharmaceuticals and personal care products (PPCPs) and release as human waste have become a serious concern in recent years. Constructed wetlands (CWs) are a low-cost technology for wastewater treatment, however, its performanc...
Conference Paper
Full-text available
Pharmaceuticals and personal care products (PPCPs) which are increasingly used, are released as human waste and drained into sewer or on-site sanitation system. Since most of the existing wastewater treatment options are not equipped with ability to treat such emerging contaminants as result health risks are increased. Constructed wetlands (CWs) ha...
Article
On-site sanitation systems such as cesspools and septic tanks are widely used in most developing countries. These systems primarily aim to collect and treat toilet wastewater or blackwater. Although septic tanks are commonly used in non-sewered areas, their effluents are still rich in pathogens and other pollutants. The practice of direct discharge...
Article
Full-text available
The direct dumping of solid wastes into the rivers, discharge of industrial effluents together with direct discharge of domestic sewage have excessively polluted the major rivers Bagmati and Bish-numati. Groundwater along these river corridors is also affected from pollution of these rivers. Two major rivers: Bagmati and Bishnumati and shallow tube...
Article
Full-text available
Because of heavy dependence on groundwater for drinking water and other domestic use, microbial contamination of groundwater is a serious problem in the Kathmandu Valley, Nepal. This study investigated comprehensively the occurrence of pathogenic bacteria in shallow well groundwater in the Kathmandu Valley by applying DNA microarray analysis target...
Article
Full-text available
Although groundwater is a major water supply source in the Kathmandu Valley of Nepal, it is known that the groundwater has significant microbial contamination exceeding the drinking water quality standard recommended by the World Health Organization (WHO), and that this has been implicated in causing a variety of diseases among people living in the...
Article
This paper develops a structured framework that considers an index of means for achieving sustainability, the ‘groundwater sustainability infrastructure index (GSII)’, as a measure of groundwater sustainability. The infrastructure here refers to the existing knowledge, practices and institutions whose adequate strengthening helps achieve groundwate...
Conference Paper
We investigated production and consumption processes of nitrous oxide by measuring nitrogen and oxygen isotopes ratio of dissolved nitrous oxide and nitrate, dissolved nitrous oxide concentration and other chemicals in the groundwater at Kathmandu Valley, Nepal. We collected the groundwater samples from 36 wells in August and September 2009, and Au...
Conference Paper
Groundwater quality is a critical problem in Kathmandu Valley, Nepal. The population of the city increased 6 times in the last six decades and more than half of water demand depends on groundwater resource. Nevertheless, few data of microorganism presence have been reported qualitatively in the central area of the valley. We investigated distributi...
Conference Paper
Groundwater is an important water resource in Kathmandu valley, Nepal. It shares about 50% of the total water supply in the valley. In recent years, there has been a marked expansion in water demand due to population and industrial growth. It has led to heavy consequences on the groundwater levels and well yields, which are being declined. Therefor...
Article
This study was carried out to assess the overall water quality and identify major variables affecting the deep groundwater quality in Kathmandu Valley, Nepal. Forty-two deep wells were sampled during premonsoon and monsoon seasons in 2007 and analyzed for the major physicochemical variables. The water quality variables such as NH 4 + -N, Fe, Pb, As...
Article
Kathmandu Valley aquifer in central Nepal is continuously under stress since the commencement of mechanized extraction of groundwater resources in early 1970s. Many wells have been drilled in shallow and deep aquifers of the valley; and numerous studies have been made in last four decades to understand the aquifers. However, up-to-date information...
Article
Full-text available
We aimed to assess the presence and availability of arsenic (As) in intertidal marshes of the Scheldt estuary. Arsenic content was determined in soils sampled at 4 sampling depths in 11 marshes, together with other physicochemical characteristics. Subsequently, a greenhouse experiment was set up in which pore water arsenic (As) concentrations were...
Article
A study was carried out to assess the spatial distribution of arsenic in the intertidal sediments of the River Scheldt in Belgium. Sediment samples were collected from different locations along the River Scheldt up to 100 cm depth and analysed for the major physicochemical properties. The study reveals that the arsenic contents in the sediment samp...
Article
This study was carried out to assess arsenic occurrence in groundwater of Kathmandu Valley, Nepal, with focus on spatial and seasonal variation, total and dissolved arsenic concentration and the arsenic release process. Several deep and shallow groundwater samples from northern and central groundwater districts were collected during the pre-monsoon...
Article
Full-text available
This study aims to assess the occurrence of arsenic in the intertidal sediments of River Scheldt in Belgium. Samples of the sediments were collected from eleven different locations along the River Scheldt up to 100 cm depth and analysed for physicochemical properties including arsenic contents. The study revealed that the arsenic contents in the se...

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Projects

Project (1)
Project
WSD is a multi-disciplinary policy research and capacity development project that aims to stimulate sustainable development in the Asia region. The project will investigate the role of water in the society, economy and natural environment, and scientifically demonstrate how the achievement of the United Nations Sustainable Development Goals (SDGs), especially Goal 6, will contribute to the development of the region. Rural areas in Asia often find their economic activity tied to water environment, especially where agriculture, industries, or services linked to nature/historical landscapes are the main source of income. The interdependence between human livelihood and nature means that any change in quality, quantity and movement of water has social, economic, and environmental consequences. The centrality of water, its role, and impact is such that the SDGs place the conservation of the water environment at the heart of Goal 6.