Interflow and Tile Flow Analysis for the Minnesota River Basin FINAL

Interflow and Tile Flow Analysis for the Minnesota River Basin FINAL

2019-01-02

This memorandum discusses hydrologic components contributing to streamflow during periods when Total Suspended Solids (TSS) exceeds criterion concentrations in the Minnesota River Basin (MRB). This deliverable is for Objective 2, Task C of Modeling Support for the Minnesota River Basin Sediment Reduction Strategy Updates. In Task A, linked Hydrologic Simulation Program Fortran (HSPF) models of MRB watersheds (Tetra Tech, 2016) were used to identify and characterize TSS exceedances for major tributaries to the Minnesota River (Tetra Tech, 2018). The mouths of analyzed tributary streams are classified as type 2B, warm water/cool water, and the Minnesota Water Quality Standard for TSS for type 2B segments specifies a target TSS concentration of ≤ 65 mg/L with an exceedance frequency of ≤ 10% between April - September (https://www.revisor.mn.gov/rules/?id=7050.0222).

Schmidt, Michelle
Butcher, Jon

Tetra Tech https://www.tetratech.com/
Tetra Tech https://www.tetratech.com/

Minnesota Pollution Control Agency

Minnesota Pollution Control Agency (St. Paul, Minnesota)

16

Agricultural Drainage
Water Restoration & Protection
Water Monitoring & Assessment
Surface Water
Water Quality & Pollutants

Tile drainage
Total suspended solids
Channel sediment
Modelling

Minnesota River

2010-2019

No

https://www.pca.state.mn.us/water/minnesota-river-basin

Public Domain

Minnesota Pollution Control Agency