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Lower Mississippi-Gulf Water Science Center -- Arkansas
Lakes Maumelle and Winona
Short Title: Lakes Maumelle and Winona
Project Chief: Jim Petersen
Cooperator: Central Arkansas Water
Project Time Frame: 1989 - present
Lakes Maumelle and Winona are water-supply reservoirs for the Little Rock and North Little Rock metropolitan areas in central Arkansas. In addition to water supply, the reservoirs are used for recreation and fish and wildlife habitat. As the urban and agricultural development of the basins has increased in the last 20 years, concerns about the sustainability of the quantity and quality of the water supply also have increased. Monitoring changes in the hydrology and water quality of the basin as the land use changes is critical to managing the resource.
Photo of USGS gage at Lake Maumelle.
A long-term water-quality database is important to accurately assess present water-quality conditions, trends, and sensitivity to change. Hydrologic and water-quality data have been collected on Lakes Maumelle and Winona and their inflows from 1989 to present by USGS in cooperation with Central Arkansas Water (CAW), the utility that owns and operates the two water-supply reservoirs. Water samples are being collected four times annually at several sites in each lake along with vertical profiles for field parameters. Water-quality samples are collected six times annually plus during three storm events at all streamflow-monitoring sites. In addition, automatic samplers are operating at four tributary sites to collect multiple samples during storm runoff events.
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