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Table 1. Monthly ground-water withdrawals and model-calculated streamflows for the Hunt, Annaquatucket, and Pettaquamscutt Rivers, 1993-98
(withdrawals and streamflows are in million gallons per day. To convert to cubic feet per second, multiply million gallons per day by 1.547)

Month

1993-98 average monthly ground-water withdrawals from the basin

Streamflow calculated for no ground-water withdrawals (pre-development streamflow)

Streamflow calculated for 1993-98 withdrawals (shown in parentheses as a percentage of the calculated pre-development streamflow)

Reduction in streamflow caused by 1993-98 withdrawals

Hunt River

July 3.8 14.0 11.0 (79) 3.0
August 3.6 11.9 8.8 (74) 3.1
September 2.9 10.1 7.3 (72) 2.8

Annaquatucket River

July 2.3 9.2 7.3 (79) 1.9
August 1.7 8.8 7.1 (81) 1.7
September 1.2 8.3 7.0 (84) 1.3

Pettaquamscutt River

July 0.4 4.8 4.4 (92) 0.4
August 0.3 4.2 3.9 (93) 0.3
September 0.2 3.8 3.6 (95) 0.2

U.S. Geological Survey

table 1

USGS Fact Sheet FS-063-01

U.S. Department of Interior

October, 2001

 

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