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<br />111 <br /> <br />'J <br /> <br />1.5. Do we have adequate data on sedimentation for <br />planning purposes? <br /> <br />"Perhaps the greatest need in the basin is adequate <br />information on sediment." <br /> <br />I <br /> <br />16. Do we have adequate data on erosion? <br /> <br />"Detailed erosion surveys of the area are essential." <br /> <br />17. Do we have enough data on geology and soils? <br /> <br />"Geologic and soil maps are almost absent." <br /> <br />18. Do we know enough about the water lost through <br />evapo-transpiration by water-wasting weeds to determine. whether <br />we could not save enough water by their elimination to avoid <br />expense of transmountain diversions? <br /> <br />"Although a number of agencies are studying the <br />problem, its magnitude and its bearing upon the water resources <br />are such as to justify prosecution of an immediate and adequate <br />research program designed to determine the amomt of water lost <br />through transpiration of various types of plants and to suppress <br />all nonbeneficial weed-tree or shrub growth." <br /> <br />19.. Why is there such a lack of basic data? <br /> <br />"The paucity of population and resources is in general <br />responsible for a general lack of basic information about the <br />basin. This is felt particularly in research on land management <br />practices. Although investigations have been carried on by State <br />and Federal agencies, not much attention has been given the over-all <br />problem. Much of the reason lies in t he predominant Federal <br />ownership and the lack of Federal backing of watershed research. <br /> <br />About 7~ of the total Basin area is in Federal <br /> <br />O\'mershi p . " <br /> <br />20. Have State and Federal agencies been able to <br />carry out their responsibilities toward watershed management? <br /> <br />"The fact that the bulk of the lands are in public . <br />ovmership, primarily Federal, and t hat these publicly ~dministered <br />lands are among the most deteriorated lands in the country is not <br />to the credit of national land policy. 'rhat the several responsible <br />publiC agencies, Federal and State, have not taken direct and <br />positive steps to cure the long-existing evils with measures now <br />in their m~ hands is not to their credit. <br /> <br />I <br />