EPA Science Inventory

Alternative Land-Use Method for Spatially Informed Watershed Management Decision Making Using SWAT

Citation:

Karcher, S., J. VanBriesen, AND C. Nietch. Alternative Land-Use Method for Spatially Informed Watershed Management Decision Making Using SWAT. JOURNAL OF ENVIRONMENTAL ENGINEERING. American Society of Civil Engineers (ASCE), Reston, VA, 139(12):1413-1423, (2013).

Description:

In this study, a modification is proposed to the Soil and Water Assessment Tool (SWAT) to enable identification of areas where the implementation of best management practices would likely result in the most significant improvement in downstream water quality. To geospatially link potential locations to individual land owners, a land use layer that incorporated specific crops and crop rotations needed to be developed. Model results obtained using the new land use layer are compared to those obtained using a more conventional land use layer. Results indicate that water flow and nutrient loadings are similar at the basin outlet, confirming overall consistency of the approach. Water flow results at upland subbasin outlets appear similar; however, nutrient loadings are different since the crop distributions in the alternative approach are more representative of actual practice in the basin. These results suggest that the alternative, crop-rotation-specific method can be used to provide additional information for spatially-resolved decision making regarding nutrient loading and downstream nutrient concentrations.

Purpose/Objective:

A modification is presented to the Soil and Water Assessment Tool (SWAT) to enable identification of areas where the implementation of best management practices would likely result in the most significant improvement in downstream water quality. Results suggest that the alternative, crop-rotation-specific method can be used to provide additional information for spatially-resolved decision making regarding nutrient loading and downstream nutrient concentrations.

URLs/Downloads:

http://dx.doi.org/10.1061/(ASCE)EE.1943-7870.0000770   Exit

Website   Exit

Record Details:

Record Type: DOCUMENT (JOURNAL/PEER REVIEWED JOURNAL)
Start Date: 12/01/2013
Completion Date: 12/01/2013
Record Last Revised: 02/25/2014
Record Created: 02/10/2014
Record Released: 02/10/2014
OMB Category: Other
Record ID: 268477

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF RESEARCH AND DEVELOPMENT

NATIONAL RISK MANAGEMENT RESEARCH LABORATORY

WATER SUPPLY AND WATER RESOURCES DIVISION

WATER QUALITY MANAGEMENT BRANCH