Red Lake River Farm to Stream Tile Drainage Study - Red Lake Watershed District –
Project Background
Theories
Water Quality Comparisons
Thief River Watershed Marshall/Beltrami Co. Project Area
Marshall County Sites
Red Lake Co. Project Area Wild Rice Paddy Monitoring Clearwater River Watershed
Red Lake County Sites
Clearwater County (Wild Rice) Sites
Tile Water Quality Findings Conventional Agriculture
Tile Outlet Comparisons
Marshall Co. Gravity Tile Red Lake Co. Gravity Tile Marshall Co. Pumped Tile Natural Background
Surface Drainage Water Quality
Surface Versus Tile Conventional Ag AVERAGES SurfaceTile Total Phosphorus (mg/L) Total Suspended Solids (mg/L) Nitrates (mg/L) Total Nitrogen (mg/L) Turbidity (NTU)
Drainage vs. Natural Background Levels - Comparable or Better -
Drainage vs. Natural Background Levels - Cause for Concern -
Wild Rice Paddy Water Quality Results
VS. Sfc. ML Tile
Wild Rice Main Line Tile Win–Win Solution
Wild Rice Paddy Sfc. Drainage Impact on the Clearwater River
Wild Rice Paddy Results – Impact on Clearwater River
FLOW
Flow Comparison Theories Being Tested
How is flow measured?
Peak Flows
More Information More Questions
Future Plans
Questions? More information is available on the RLWD website: Corey Hanson