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首页> 美国政府科技报告 >Method for Estimating Potential Wetland Extent by Utilizing Streamflow Statistics and Flood-Inundation Mapping Techniques: Pilot Study for Land Along the Wabash River Near Terre Haute, Indiana.
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Method for Estimating Potential Wetland Extent by Utilizing Streamflow Statistics and Flood-Inundation Mapping Techniques: Pilot Study for Land Along the Wabash River Near Terre Haute, Indiana.

机译：利用流量统计和洪水淹没测绘技术估算潜在湿地范围的方法：在印第安纳州特雷霍特附近的Wabash河沿岸土地试点研究。

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Potential wetland extents were estimated for a 14-mile reach of the Wabash River near Terre Haute, Indiana. This pilot study was completed by the U.S. Geological Survey in cooperation with the U.S. Department of Agriculture, Natural Resources Conservation Service (NRCS). The study showed that potential wetland extents can be estimated by analyzing streamflow statistics with the available streamgage data, calculating the approximate water-surface elevation along the river, and generating maps by use of flood-inundation mapping techniques. Planning successful restorations for Wetland Reserve Program (WRP) easements requires a determination of areas that show evidence of being in a zone prone to sustained or frequent flooding. Zone determinations of this type are used by WRP planners to define the actively inundated area and make decisions on restoration-practice installation. According to WRP planning guidelines, a site needs to show evidence of being in an 'inundation zone' that is prone to sustained or frequent flooding for a period of 7 consecutive days at least once every 2 years on average in order to meet the planning criteria for determining a wetland for a restoration in agricultural land. By calculating the annual highest 7-consecutive-day mean discharge with a 2-year recurrence interval (7MQ2) at a streamgage on the basis of available streamflow data, one can determine the water-surface elevation corresponding to the calculated flow that defines the estimated inundation zone along the river.

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