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MODELING OF NONPOINT SOURCE POLLUTION OF NITROGEN AT THE WATERSHED SCALE 1
Author(s) -
Heng Hock Hwee,
Nikolaidis Nikolas P.
Publication year - 1998
Publication title -
jawra journal of the american water resources association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.957
H-Index - 105
eISSN - 1752-1688
pISSN - 1093-474X
DOI - 10.1111/j.1752-1688.1998.tb04141.x
Subject(s) - watershed , nonpoint source pollution , environmental science , hydrology (agriculture) , time of concentration , groundwater , surface runoff , nutrient pollution , watershed management , pollution , ecology , geology , computer science , geotechnical engineering , machine learning , biology
The Watershed Nutrient Transport and Transformation (NTT‐Watershed) model is a physically based, energy‐driven, multiple land use, distributed model that is capable of simulating water and nutrient transport in a watershed. The topographic features and subsurface properties of the watershed are refined into uniform, homogeneous square grids. The vertical discretization includes vegetation, overland flow, soil water redistribution and groundwater zones. The chemical submodel simulates the nitrogen dynamics in terrestrial and aquatic systems. Three chemical state variables are considered (NO 3 ‐ ‐ , NH 4 + , and Org‐N). The NTT‐Watershed model was used to simulate the fate and transport of nitrogen in the Muddy Brook watershed in Connecticut. The model was shown to be capable of capturing the hydrologic and portions of the nitrogen dynamics in the watershed. Watershed planners could use this model in developing strategies of best management practices that could result in maximizing the reductions of nitrogen export from a watershed.