A cooperative study was conducted by the U.S. Geological Survey (USGS), the Metropolitan Council, and the Minnesota Department of Health to assess groundwater and surface-water interactions in lakes in the northeast Twin Cities Metropolitan Area (TCMA), including White Bear Lake. An important product of the study was the creation of a groundwater-flow model focused on the northeast TCMA. The groundwater flow model is available for future use to assess the effects of groundwater withdrawals on lake levels as well as to describe other groundwater and surface-water interactions.
The Minnesota Pollution Control Agency (MPCA) has identified streamflow alteration as a key stressor on aquatic life, but the characteristics of streamflow alteration acting as stressors have not been identified in the MPCA Watershed Restoration and Protection Strategy (WRAPS) process. Without indices that characterize streamflow alteration, the MPCA cannot quantitatively associate metrics of aquatic life condition to streamflow alteration. The lack of quantifiable indices limits the ability of the MPCA to assess environmental streamflow needs for streams and rivers throughout Minnesota.
This project is for on-going sampling and lab analysis for suspended sediment concentration and bedload at select sites, support for continuous Suspended Sediment Concentration measurement using turbidity and Acoustic Doppler Velocity Meter sensors, and comparison of sampling and laboratory methods for total suspended solids and suspended sediment concentrations. The project provides information for defining sediment loading and movement in streams and rivers to adequately address excess sediment problems in Minnesota water bodies.