Water Resources in Minnesota Significantly Improved by Land Restoration Water Resources in Minnesota Significantly Improved by Land Restoration Release Date: May 13, 2021 Conversion of agricultural lands to wetland and native prairie greatly enhanced the quality of water resources, increased groundwater recharge and decreased floodwaters in the Glacial Ridge National Wildlife Refuge, Minnesota, according to a U.S. Geological Survey study. Starting in 2000, The Nature Conservancy acquired and restored approximately 25,000 acres at Glacial Ridge, returning nearly all of the land to native wetland and prairie. Scientists with the USGS, in partnership with The Nature Conservancy, the U.S. Fish and Wildlife Service and the State of Minnesota, compared the hydrology of the area before and after restoration. They found substantial improvements in groundwater flow, water runoff rates and water quality as a result of land restoration, especially in areas with shallow groundwater or where drained wetlands were restored.