NLEAP/GIS approach for identifying and mitigating regional nitrate-nitrogen leaching

By: , and 
Edited by: D.L. Corwin and K. Loague



Improved simulation-based methodology is needed to help identify broad geographical areas where potential NO3-N leaching may be occurring from agriculture and suggest management alternatives that minimize the problem. The Nitrate Leaching and Economic Analysis Package (NLEAP) model was applied to estimate regional NO3-N leaching in eastern Colorado. Results show that a combined NLEAP/GIS technology can be used to identify potential NO3-N hot spots in shallow alluvial aquifers under irrigated agriculture. The NLEAP NO3-N Leached (NL) index provided the most promising single index followed by NO3-N Available for Leaching (NAL). The same combined technology also shows promise in identifying Best Management Practice (BMP) methods that help minimize NO3-N leaching in vulnerable areas. Future plans call for linkage of the NLEAP/GIS procedures with groundwater modeling to establish a mechanistic analysis of agriculture-aquifer interactions at a regional scale.

Additional publication details

Publication type Book chapter
Publication Subtype Book Chapter
Title NLEAP/GIS approach for identifying and mitigating regional nitrate-nitrogen leaching
DOI 10.2136/sssaspecpub48.c17
Year Published 1996
Language English
Publisher Soil Science Society of America
Publisher location Madison, WI
Contributing office(s) Earth Resources Observation and Science (EROS) Center
Description 12 p.
Larger Work Type Book
Larger Work Title Applications of GIS to the modeling of non-point source pollutants in the vadose zone, SSSA Special Publication 48
First page 283
Last page 294
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