WQIag - A Tool of Multiple Applications

Participants will learn about WQIag and its application by different state and federal agencies.

Conceptualized and developed by the USDA NRCS National Water Quality and Quantity Team, WQIag - Water Quality Index for Runoff from Agricultural Fields is a qualitative, multivariate metric that ranks the combined impact of soil and site characteristics, climate, and management practices on the quality of surface runoff leaving agricultural fields. The tool incorporates the impact of six components (Field Physical Sensitivity Factors, Nutrient Management Factors, Tillage Management Factors, Pest Management Factors, Irrigation/Tile Drainage Management, and Conservation Practices) in arriving at the overall index value. The tool provides a quick assessment of agricultural runoff water quality (ranking of 1 to 10; 10 being the best) that incorporates professional knowledge and local preferences through weighting factors.

Harbans Lal
Environmental Engineer
USDA NRCS National Water Quality and Quantity Team

Steven G. Hefner
State Water Quality Conservationist
USDA NRCS Missouri

James Klang, P.E.
Senior Project Engineer
Kieser and Associates, LLC


Harbans Lal

Created by Jill Heemstra

Primary Audience: Not Set