The contamination of river basins by nutrients (nitrogen and phosphorus) is a common problem in many watersheds of the world. Our research deals with assessing the reactive transport of nutrients through the aquifer and stream network, and water- and land-management practices that could be implemented to remediate contamination in the overall watershed system.

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We have developed several modeling tools to simulate nutrient fate and transport in aquifers, rivers, and watershed systems:

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SWAT-MODFLOW-RT3D: reactive transport of nitrogen and phosphorus species in watersheds (source code and tutorial is here)

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UZF-RT3D: groundwater reactive transport of nitrogen species in irrigated aquifer-stream systems

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RT3D-OTIS: coupled groundwater and surface water reactive transport of nitrogen species in irrigated aquifer-stream systems.

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These models have been applied to assess the implementation of BMPs on nitrate in surface water and groundwater.

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