Accession Number : ADA299210

Title :   Construction and Monitoring of Water and Sediments in Wetlands Created in the Black Butte Reservoir Fluctuation Zone, Orland, California.

Descriptive Note : Final rept.,

Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS

Personal Author(s) : Downer, Charles W.

PDF Url : ADA299210

Report Date : AUG 1995

Pagination or Media Count : 61

Abstract : Realizing the many important functions that wetlands perform, wetlands are being constructed to perform these functions in the absence of natural wetland areas. One often overlooked opportunity for constructed wetlands is within the fluctuation zone of U.S. Army Corps of Engineers (USACE) reservoirs operated for flood control and water supply. The fluctuation zone of a reservoir is that area in the reservoir between conservation and flood pool elevations. Reservoirs for flood control and water supply are operated according to an operating curve, or rule curve. Large expanses of shallow areas may become exposed during drawdown. These areas, located in the fluctuation zone of the reservoir, are often devoid of vegetation. Because of this operation, an opportunity exists to establish vegetated wetlands upon these normally shallow areas. Though intermittently inundated, the wetlands would be capable of supporting several important wetland functions. Wetlands located in the fluctuation zone of the reservoir can be used for sediment control and water quality enhancement by locating them to intercept high sediment concentration inflows. Along with sediments, toxic substances, such as pesticides and heavy metals, often associated with fine sediments, could be captured and detained. Establishing vegetated wetlands could help to reduce resuspension upon the shallow flats by providing wind breaks and binding bottom sediments. Halting resuspension increases water clarity and improves water quality. In addition to the water quality functions that the wetlands may perform, constructed wetlands have the potential to provide wildlife and fisheries habitat on an otherwise barren landscape.

Descriptors :   *NATURAL RESOURCES, *ENVIRONMENTAL IMPACT, *ENVIRONMENTAL MANAGEMENT, *WETLANDS, *WATER QUALITY, FUNCTIONS, OPTIMIZATION, MONITORING, TOXICITY, VARIATIONS, ARMY CORPS OF ENGINEERS, VEGETATION, HABITATS, FISHERIES, FOOD, WILDLIFE, SEDIMENTS, RESERVOIRS, WATER SUPPLIES, FLOOD CONTROL, PESTICIDES, HEAVY METALS, SHALLOW DEPTH.

Subject Categories : Ecology
      Hydrology, Limnology and Potamology
      Water Pollution and Control

Distribution Statement : APPROVED FOR PUBLIC RELEASE