Data sets related to Wetland extent maps for 12 stream reaches covering approximately 750 river miles in Indiana
Dates
Publication Date
2019-08-08
Citation
Fowler, K.K., Sperl, B.J. and Kim, M.H., 2019, Data sets related to Wetland extent maps for 12 stream reaches covering approximately 750 river miles in Indiana: U.S. Geological Survey data release, https://doi.org/10.5066/P9LGXDJ8.
Summary
Potential wetland extents were estimated for 12 river reaches covering approximately 750 river miles in Indiana. The study was completed by the U.S. Geological Survey in cooperation with the U.S. Department of Agriculture, Natural Resources Conservation Service (NRCS). This study follows and adds to the work completed in the pilot study (Kim and others, 2012) and shows that potential wetland extents can be estimated using streamflow statistics, streamgage data, and flood-inundation mapping techniques. The study was designed to assist in the Agricultural Conservation Easement Program (ACEP). The ACEP is a voluntary program administered by the NRCS. It provides technical and financial assistance to private landowners and Tribes to restore, [...]
Summary
Potential wetland extents were estimated for 12 river reaches covering approximately 750 river miles in Indiana. The study was completed by the U.S. Geological Survey in cooperation with the U.S. Department of Agriculture, Natural Resources Conservation Service (NRCS). This study follows and adds to the work completed in the pilot study (Kim and others, 2012) and shows that potential wetland extents can be estimated using streamflow statistics, streamgage data, and flood-inundation mapping techniques.
The study was designed to assist in the Agricultural Conservation Easement Program (ACEP). The ACEP is a voluntary program administered by the NRCS. It provides technical and financial assistance to private landowners and Tribes to restore, protect, and enhance wetlands in exchange for retiring eligible land from agriculture. For a site to be eligible for wetland restoration, it should be in a zone with sustained or frequent flooding. This study calculated the flows that occurred for a period of seven consecutive days on average at least once every two years (a value termed the 7MQ2) for all the U.S Geological Survey streamgages within the selected river reaches. These 7MQ2 flows were related to the stage-discharge tables for each streamgage and a corresponding water-surface elevation was determined. Maps of estimated wetland extent were prepared using the 7MQ2 inundation elevation data in conjunction with bare-earth land surface elevation data made publicly available through the online geospatial data clearinghouses of Indiana, Illinois, and Ohio. Flood-inundation mapping techniques were applied with the aid of Geographic Information System (GIS) software to generate water-surface planes that represent inundation elevations associated with the 7MQ2 streamflow. Land-surface elevation data from high-resolution digital elevation models (DEMs) were subtracted from the water-surface planes to produce maps of wetland extent. The 12 map products, including data sets and geoprocessing tools, produced from this study will aid the NRCS and its partners with the onsite inundation-zone verification in agricultural land for potential restoration.
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Related External Resources
Type: Related Primary Publication
Fowler, K.K., Sperl, B.J. and Kim, M.H., 2019, Estimating potential wetland extent along selected river reaches in Indiana using streamflow statistics and flood-inundation mapping techniques: U.S. Geological Survey Scientific Investigations Report 2019–5063, 12 p., https://doi.org/10.3133/sir20195063.
This data release presents the data sets used in the calculations to estimate the potential wetland extents for 12 river reaches in Indiana and parts of Ohio and Illinois. All 12 stream reaches were graphically analyzed using historical flood profiles. Historical flood events and and high-water marks were used as supplemental data for three reaches. GIS data files and associated metadata for each of the 12 river reaches are available in this data release.
