Meramec Flood Inundation Mapping

The Meramec River is the longest free-flowing river through east-central Missouri and has been a source of flood damage for many years. During late December and early January (2015-2016) there was large scale flooding along a 50-mile reach of the Lower Meramec River from Pacific, Missouri downstream to the mouth at the Mississippi River. Substantial impacts in a seven-mile reach of the Meramec River, from Valley Park, downstream to Fenton, Missouri. The United States Geological Survey (USGS) Missouri Water Science Center (MOWSC) proposes to develop an online flood inundation mapping tools (FIM) for a selected reach of the lower Meramec River. The Meramec River floodplain is well suited for estimated flood inundation mapping because of the availability of stage and discharge data at both of these streamgages. The objectives of this study are to utilize existing one-dimensional hydraulic models developed by the United States Army Corps of Engineers (USACE) along the seven-mile reach.