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wetlands through land use planning, acquisition and wetland protection laws.
wetlands to improve wetland health and function and by re-establishing destroyed wetlands.
wetlands by getting your feet wet and learning about their wonders.

Wisconsin wetlands assessment reports and maps

The following is a list of reports of projects completed in the past few years. All projects have been funded by U.S. Environmental Protection Agency–Region V Wetland Grants.

  • Accuracy Assessment of Ephemeral Pond Wetlands Mapping in Southeastern Wisconsin: Wisconsin Ephemeral Ponds Project (WEPP) [PDF]

    This report presents the results of an accuracy assessment of an ephemeral ponds mapping project in southeastern Wisconsin. The project mapped 9,058 “Potential Ephemeral Ponds” or PEPs in an eight county study area in southeastern Wisconsin. The accuracy assessment consisted of “ground-truth” surveys of 113 randomly selected mapped ponds and a 150m area “search area” surrounding the selected pond. The error of commission rate for incorrectly mapping a feature as an ephemeral pond, when it was not a wetland was 23%. The error of omission rate for missing ephemeral ponds was 19%. The size of the ephemeral ponds that were missed indicates that setting a minimum mapping unit of 0.03 acre (or 1,307 sq. ft.) as the minimum size that can be reliably mapped would be justified for this method.

  • Improving Wisconsin’s Wetland Compensatory Mitigation Program: Factors Influencing Floristic Quality and Methods for Monitoring Wildlife (August 2009) [PDF] Appendix A [PDF], Appendix B [PDF], Appendix C–E [PDF]

    This report contains three parts. The first part provides the results from evaluating vegetation data from 20 wetland restoration projects. The second part evaluates wildlife monitoring methods for possible use in wetland compensatory mitigation monitoring plans. The final part proposes ways to use a watershed approach to define restoration goals for a site.

  • Mapping Potentially Restorable Wetlands in the Rock River Basin [PDF]

    This report details the process used to develop a map of potentially restorable wetlands in the 2.3 million acre Rock River basin, so that it can be duplicated to produce maps for other areas and projects. The maps can be used to identify restoration opportunities and target high priority areas where wetland restoration can provide the “biggest bang for the buck” in ecosystem benefits. The data will be used to aid the implementation of the Rock River Basin TMDL plan.

  • Mead Lake Watershed Wetlands Assessment Project (April 2007) [PDF]

    This report used digital wetland, soils and land use layers to identify potentially restorable wetland (PRW) sites. Relationships between the amount of lost, remaining and original wetlands were used to identify priority subwatershed areas for wetland restoration. The report also considers factors that affect restoration opportunity, such as incompatible land uses, hydrologic changes, and the need for appropriate incentives to motivate Mennonite and Amish landowners.

  • Reed Canary Grass Dominated Wetlands Data Layer

    The data layer was created from a mosaic of satellite images covering the entire state of Wisconsin. The map documents 498,250 acres of reed canary grass dominated wetlands at a minimum mapping unit of 1/2 acre. You can zoom in on a portion of the map to see areas of interest.

    The data layer is available for viewing through the Wisconsin DNR Surface Water Data Viewer.

    1. Open the viewer by clicking on the link.
    2. Click on Layers in the blue header line.
    3. Click on the folder icon next to Invasive Species in the left column.
    4. Zoom in to the area of interest and check the box next to Reed Canary Grass Infestations, or click the plus sign after Reed Canary Grass Infestations to have it zoom in for you.
    5. If you click on the layer name, more information is given in a pop–up window.
    6. To see the legend, click on Legend in the blue header line.

    For more information on viewing this map, please contact:

    Christopher Smith

  • Mapping Wisconsin Wetlands Dominated by Reed Canary Grass, Phalaris arundinacea L.: A landscape level assessment [October 2008, PDF]

    This report outlines the procedure for mapping reed canary grass across the state. The final output is discussed with some conclusions drawn about the areas where reed canary grass concentrations are highest.

  • Using Landsat Imagery to Map Invasive Reed Canary Grass (Phalaris arundinacea): A Landscape Level Wetland Monitoring Methodology [March 2004, PDF]

    This report describes the rationale for mapping invasive reed canary grass in a pilot area and documents the classification protocol used to create the map. Results are reported by watershed.

  • Development of Methods to Assess and Monitor Small Wetlands Restored on Private Lands [PDF]
    This report by Jill Hapner, prepared with the support of Ozaukee County and EPA Region V, evaluates wetlands restored on private lands in Ozaukee County. Wetland functions in a random sample of the county restoration sites were measured and compared. The report also includes survey results about the management concerns of the wetland landowners.
Contact information
For more information about this page, please contact:
Tom Bernthal
Last Revised: Tuesday June 27 2017