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Impacts of drainage water management on subsurface drain flow, nitrate concentration, and nitrate loads in Indiana
Adeuya, R., N. Utt, J. Frankenberger, L. Bowling, E. Kladivko, S. Brouder, AND B. Carter. Impacts of drainage water management on subsurface drain flow, nitrate concentration, and nitrate loads in Indiana. JOURNAL OF SOIL AND WATER CONSERVATION. Soil and Water Conservation Society, 67(6):474-484, (2012).
The purpose of this work was to evaluate the impact of drainage water management on drain flow, nitrate concentration and nitrate load from tile drained agricultural fields in Indiana.
Drainage water management is a conservation practice that has the potential to reduce drainage outflow and nitrate (NO3) loss from agricultural fields while maintaining or improving crop yields. The goal of this study was to quantify the impact of drainage water management on drain flow, NO3 concentration, and NO3 load from subsurface drainage on two farms in Indiana. Paired field studies were conducted following the paired watershed statistical approach modified to accommodate autocorrelation. Annual NO3 load reductions ranged from 15% to 31%, with an overall reduction of 18% to 23% over the 2-year period, resulting from reductions in both flow and NO3 concentration. Although the study revealed weaknesses in using the paired statistical approach for a dynamic practice like drainage water management, the results of this study support the use of drainage water management as a conservation practice and provide information for decision-makers about the level of benefits that can be anticipated.
URLs/Downloads:Impacts of drainage water management on subsurface drain flow Exit
Record Details:Record Type: DOCUMENT (JOURNAL/PEER REVIEWED JOURNAL)
Organization:U.S. ENVIRONMENTAL PROTECTION AGENCY
OFFICE OF RESEARCH AND DEVELOPMENT
NATIONAL RISK MANAGEMENT RESEARCH LABORATORY
GROUND WATER AND ECOSYSTEMS RESTORATION DIVISION
ECOSYSTEM & SUBSURFACE PROTECTION BRANCH