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Streambank StabilizationDemonstration ProjectsThe staff provided technical assistance to Arkansas Soil and Water Conservation Commission (ASWCC) to develop a uniform approach to streambank restoration. NWMC assistance included participation in Project Coordination, Site Restoration Design, Implementation of Practices, Technology Transfer, and Post Construction Evaluation. The Streambank Restoration Project targets four counties across the Ozark Highlands Eco-regions and involves planning, design, re-construction, and bio-engineering to protect/restore up to 1000 feet of streambanks. The Water Management Center has worked with Oklahoma NRCS the past two years collecting field surveys, analyzing data, and preparing a Watershed Assessment Report on the Sugar Creek Watershed. Strategic targets are to protect and maintain the watershed's infrastructure (bridges, and floodwater retarding structures), while enhancing and preserving the watershed's natural resource base for agriculture. For more information you may access the Sugar Creek Fluvial Geomorphic Restoration Study Website. Regionalized CurvesNWMC has worked in Oklahoma, Arkansas, and Kansas in the past three years collecting field surveys of cross sections and profiles at USGS gaging sites, analyzing gage data, and preparing a database of geomorphic dimensionless parameters for various Rosgen stream classifications. One important dimensionless parameter is the meander width ratio: the belt width or the width of the lateral migration across the floodplain, divided by the bankfull width. One project in Oklahoma deals with a watershed composed of fine alluvial sands and silts weakly cemented together. After studying reference reaches in a nearby area, on similar slopes, soils, and climate, we discovered that these streams in Southwest Oklahoma have a tendency to migrate 27 times its bankfull width across the floodplain. This is important to know for planning purposes, buffer strip design, floodplain management, and EWP. It also lets the landowners know what their straightened streams are in for, down-the-line, when the big storms move through and change the landscape around! Hydraulic Modeling for Project Development and Streambank StabilizationNWMC is involved with the hydraulic modeling of Big Piney Creek in Arkansas for a streambank stabilization and demonstration project sponsored by Arkansas Soil and Water Conservation Commission. The United States Army Corps of Engineers (USACE) computer program UNET- A One-Dimensional Unsteady Flow Through a Full Network of Open Channels, is being utilized to estimate velocities, shear stresses, and depths of flow during a "bankfull event". NWMC is finishing up a feasibility study in Northwestern Louisiana to supplement 13,800 arable acres of farmland with irrigation water from the Red River. Contact: |
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