Effectiveness of Spur Dike Notchingby F. Douglas Shields, Jr., US Army Engineers Waterways, Experiment Station, United States,
Abstract: The most widely used technique of ameliorating the environmental effects of river-training works has been to construct notches in spur dikes (or to allow notches to remain in damaged dikes) to prevent sediment accretion below the dike and to develop diverse depth, velocity, and bed material within the dike field conductive to a diverse aquatic community. Despite the fact that over 1,500 notches have been constructed along the Missouri River and several dozen along the Mississippi River, the physical and biological effects are not well documented. The purpose of this paper is to describe the physical effects of notching several spur dikes along the middle Missouri River.
Subject Headings: Levees and dikes | Aquatic habitats | Bed materials | Sediment | Fluid velocity | Biological processes | Missouri River | Mississippi River
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