Modeling nitrate contamination of groundwater in agricultural watersheds

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Journal Title, Volume, Page: 
Journal of Hydrology (2007) 343, 211– 229
Year of Publication: 
Mohammad N. Almasri
Water and Environmental Studies Institute, An-Najah National University, P.O. Box 7, Nablus, Palestine
Current Affiliation: 
Department of Civil Engineering, An-Najah National University, Palestine
Jagath J. Kaluarachchi
Department of Civil and Environmental Engineering, Utah Water Research Laboratory, Utah State University, Logan, Utah 84321-8200, USA
Preferred Abstract (Original): 
This paper presents and implements a framework for modeling the impact of land use practices and protection alternatives on nitrate pollution of groundwater in agricultural watersheds. The framework utilizes the national land cover database (NLCD) of the United State Geological Survey (USGS) grid and a geographic information system (GIS) to account for the spatial distribution of on-ground nitrogen sources and corresponding loadings. The framework employs a soil nitrogen dynamic model to estimate nitrate leaching to groundwater. These estimates were used in developing a groundwater nitrate fate and transport model. The framework considers both point and non-point sources of nitrogen across different land use classes. The methodology was applied for the Sumas–Blaine aquifer of Washington State, US, where heavy dairy industry and berry plantations are concentrated. Simulations were carried out using the developed framework to evaluate the overall impacts of current land use practices and the efficiency of proposed protection alternatives on nitrate pollution in the aquifer.
Modeling Nitrate Contamination Of Groundwater In Agricultural Watersheds933.75 KB