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June Water Conditions Normal in Maryland, Delaware, and D.C. - Chesapeake Bay Inflow in June Four Times Higher than Drought of 1999

U.S. Department of the Interior
U.S. Geological Survey

Wendy McPherson (
Maryland-Delaware-D.C. Water Science Center
5522 Research Park Drive
Baltimore, MD 21228
FAX: (443)498-5510

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Updated: July 7 , 2000

Streamflow and Groundwater levels during June in theMaryland-Delaware-DC region are generally in the normal range, according to hydrologists at the U.S. Geological Survey (USGS) in Baltimore, Maryland. The average streamflow for several key sites in June 2000 is 3 to 4 times higher than in June 1999 when the region was heading into drought conditions and associated water-supply restrictions.

The average streamflow into the Chesapeake Bay during June 2000 was 45.2 billion gallons per day, which is 12 percent above the long-term average for June, and 4 times greater the flow in than June, 1999 (11.2 billion gallons per day). Streamflow during June at the Potomac River near Washington, D.C., averaged 5.1 billion gallons per day, which is about normal for June, and over 3 times greater than in June 1999 (1.5 billion gallons per day). In western Maryland and on the upper Potomac River, streamflow was in the normal range for the month of June and was close to the long-term average for June. Streamflows on the Eastern Shore in June were much lower than those measured in May, but were still normal for this time of year. Throughout the rest of the bistate area, streamflow in local streams remained about the same, and remained within the normal range for June.

Groundwater levels at the end of June decreased throughout the area but generally remained in the normal range throughout the entire bistate area. Monthly updates of Groundwater conditions for 32 key observation wells located throughout Maryland and Delaware may be found at Water storage in the Baltimore reservoir system was 70.6 billion gallons near the end of June, which is 93 percent of capacity.

As the nation's largest water, earth and biological science, and civilian mapping agency, the USGS works in cooperation with more than 2,000 organizations across the country to provide reliable, impartial scientific information to resource managers, planners, and other customers. This information is gathered in every state by USGS scientists to minimize the loss of life and property from natural disasters, contribute to the sound conservation and the economic and physical development of the nation's natural resources, and enhance the quality of life by monitoring water, biological, energy, and mineral resources.

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