Modeling Irrigation and Nitrogen Management

by Derrel Martin, Univ of Nebraska, United States,
Gregory Jennings, Univ of Nebraska, United States,
James Schepers, Univ of Nebraska, United States,



Document Type: Proceeding Paper

Part of: Planning Now for Irrigation and Drainage in the 21st Century

Abstract:

Irrigation increases the potential for nitrate accumulation in the groundwater in two ways. It increases the water content in the root zone creating a greater potential for leaching. Two general approaches to modeling irrigation and N management are reviewed in the paper. Examples of the use of convective-dispersive models in Nebraska are presented. Problems associated with this type of model are highlighted. The use of transfer function models to describe water and solute transport is also reviewed. The current limitations of these types of models are discussed.

Subject Headings: Mathematical models | Irrigation | Groundwater management | Nitrates | Groundwater quality | Water quality | Nutrient pollution | Nebraska | United States

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