Sediment accumulation in lake chicot,Arkansas |
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| Authors: | Jerry C Ritchie Charles M Cooper J Roger McHenry Frank R Schiebe |
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| Institution: | (1) USDA Hydrology Laboratory, 20705 Beltsville, Maryland;(2) USDA Sedimentation Lab., 38655 Oxford, Mississippi;(3) USDA Water Quality & Watershed Res. Lab., 74701 Durant, Oklahoma |
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| Abstract: | Lake Chicot is an oxbow lake located along the western side of the Mississippi River in southeastern Arkansas. A major flood
in 1927, levee construction, land use changes from bottomland hardwood to agriculture, a large increase in drainage area,
and stream channelization have altered the appearance of contributing watersheds and the lake. The lake often has high suspended
sediment concentrations making it undesirable for recreation and aquatic production. As part of a coordinated study to determine
changes in the lake, sediment accumulation patterns and rates were determined in Lake Chicot using the137Cs technique. Major sediment accumulation is occurring near the major inlet and along the thalweg of the oxbow. Average sediment
accumulation of 1.8 cm/yr since 1963 was measured for twelve samples. Calculations show sediment accumulation is decreasing.
This study has shown that the137Cs technique can provide useful planning information for the environmental geologist or reservoir manager. Results of the
current study will be used to develop better sediment and water management strategies for Lake Chicot.
Contribution of the U.S. Department of Agriculture, Agricultural Research Service, in cooperation with the Vicksburg District
of the U.S. Army Corps of Engineers. |
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