OCR Text |
Show Cropland-The continuing land treatment and management program consists primarily of measures for erosion, sediment, and runoff con- trol to be installed on about 420,000 acres of cropland during the period 198l to 2020. Rangeland-Measures for control of erosion, wildfire, sediment, and damaging runoff, and for improvement of forage production, are included for about 35 million acres of rangeland. Forest Land-Programs for meeting the demands for forest resources and uses by 2020 will require that about kO percent of the forest resource potential be developed. This is equivalent to the develop- ment of about 7.6 million acres of forest lands during the period from 198l to 2020. Treatment of forest land to increase water yield by about 150,000 acre-feet annually through vegetative management and to improve timber and forage production is planned. Urban and Other-The program provides for installation of land treatment and management measures on about 510,000 acres of urban and other lands for erosion, sediment, and runoff control during the 1980 to 2020 period. Flood Control The continuing flood control program includes impoundments total- ing more than 1.2 million acre-feet of storage, 535 miles of channel improvements, and 165 miles of levees, land treatment protection on 5^5>OOO acres, and nonstructural measures. Average annual benefits from the recommended flood control program by 2020 would average about $2^2 million-a reduction in flood damage of approximately 78 percent. It is not physically or economically feasible to prevent all flood damage dire to the complexity of weather and topographic features, and the dispersed nature of the damageable values. Remaining damages at the end of the study period would total $68 million annually. The 1966-202O Flood Control Program is shown on the map following page 92. Municipal and Industrial Water The program to meet long-range future needs of the Region for municipal and industrial water includes conservation of existing sup- plies and. augmentation of existing supplies by importation, transfers from othe:r uses, ground-water development, desalination of brackish supplies, and water reuse facilities. Municipal and industrial water withdrawal requirements are expected to increase by about 2 million acre-feet between 1981 and 2020. 100 |