OCR Text |
Show XII-44 SUMMARY UPDATING THE HOOVER DAM DOCUMENTS This report presents estimates of the consumptive uses and losses from the Colorado River system for each year from 1971 to 1975. It includes a breakdown of the beneficial consumptive use by major types of use (except mainstream reservoir evaporation), by major tributary streams, and, where possible, by individual States. The main stem of the Colorado River rises in the Rocky Mountains of Colorado, flows southwesterly about 1,400 miles and terminates in the Gulf of California. Its drainage area of 242,000 square miles in this country rep- resents one-fifteenth of the area of the United States. Water is used for irrigation, municipal and industrial purposes, electric power generation, mineral activities, livestock, fish and wildlife, and recreation. Large amounts are exported from the system to adjoining areas. The following table summarizes annual water use from the system by basins and States, including water use supplied by ground water overdraft. Distribution of water use by types of use from the various reporting areas is contained within the body of the report. |