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.
USDA NRCS National Water Quality and Quantity Team
Steven G. Hefner
Water Quality Conservationist
USDA NRCS Missouri
James Klang, P.E.
Kieser and Associates, LLC