Description: This map from the U. S. Geological Survey Circular 1134, The South Florida Environment, shows the average annual discharge, in acre-feet, from major canals in south Florida based on data from 1980 to 1989. The map also shows the direction of surface water flow. Source: B. F. McPherson and R. Halley, USGS Circular 1134 (Washington, DC: U. S. Government Printing Office, 1996) 36 Map Credit: Courtesy the University of South Florida Library |
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