OCR Text |
Show 29 . ) Accepting 3 ( acre-feet acrefeet ) as 188 the duty of water , the 160,000 acres require 480,000 ( acre-feet acrefeet ) of water per year . Expressed in terms of ( second-feet secondfeet ) , this would be the equivalent of 657 ( second-feet secondfeet ) of water flowing continuously through a period of 365 days . As appears in the two next succeeding ( sub-titles subtitles ) , the government engineers fix the duty of water on lands irrigated by the water of the Green and Colorado rivers above their confluence as 3.5 ( acre-feet acrefeet ) and ( assume assarne ) that ( twenty-five twentyfive ) per cent of water diverted for irrigation purposes again finds its way back into the river . Assuming the duty of water on lands irrigated by the San Juan and its tributaries to be 3.5 ( acre-feet acrefeet ) and making no ( allowance allovance ) for return flow , the amount of water required each year to irrigate the 160,000 acres would be the equivalent of a daily stream containing 767 ( second-feet secondfeet ) of water flowing continuously for three hundred ( sixty-five sixtyfive ) days ; assuming a ( twenty-five twentyfive ) per cent return flow , said land would require a continuous flow for three hundred ( sixty-five sixtyfive ) days of a stream ( contain contain- contain ) ¬ ing 573 ( second-feet secondfeet ) . If we assume the duty of water to be only 3 ( acre-feet acrefeet ) on the San Juan lands and allow for a ( twenty-five twentyfive ) per cent return flow , the amount of water required to irrigate the 160,000 acres of San Juan land would be the equivalent of a daily stream containing1 493 ( second-feet secondfeet ) of ( water Nvater ) flowing continuously for three hundred ( sixty-five sixtyfive ) days each year . ( Colorado Colora-do Colorado ) River As appears on pages 126-7 of ( Complainant's Complainants ) Exhibit ( No Nlo ) . 58 ( ( Water-Supply WaterSupply ) Paper 395 ) 302,000 acres of Colorado land were , as early as 1913 , irrigated with water from the Colorado River and its tributaries . We have not access to ( in- in ) formation concerning additional acreage thus irrigated since 1913 , nor as to the acreage of Utah lands above Moab thus irrigated . On said last mentioned pages of said exhibit , in estimating depletions on account of irrigation , 3.5 ( acre-feet acrefeet ) is given as the duty of water and it is estimated that there is a ( twenty-five twentyfive ) per cent return flow . Accepting 3.5 ( acre- acre ) feet as the duty of water and allowing for a ( twenty-five twentyfive ) per cent return flow , the flow of the Colorado River is each year depleted by reason of water diverted for irrigating said 302,000 acres of land in an amount equal to the ( con- con ) tinuous stream flow throughout three hundred ( sixty-five sixtyfive ) days of a stream at all times carrying 760 ( second-feet secondfeet ) of water . |