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<br />o <br /> <br />c-} <br /> <br />.... <br />W <br />tD <br />W <br /> <br />the self-purification capacities of the stream need to be determined. <br />Better use would be mde of quality of water data it' the collection <br />and utilization were better coordinated. <br /> <br />k. Establish the relationships ot' water laws and rights to water <br />use and control development in hydrologic analyses. <br /> <br />This is principally a uatter to be coordinated between State and <br />local interests on the one hand and Federal agencies which are plan- <br />ning specific projects or measures. Adequate outlet capacities, under <br />empty reservoir conditions, to meet downstream deuands by vested rights <br />~t be provided in the case of any proposed reservoirs. Proposed <br />canals which intercept natural streams ~t be so planned as to not <br />interfere with streamflows required to satisfy prior rights below <br />interception points. The effects of detention dams on existing water <br />rights should also be studied prior to construction at any proposed <br />location. In all cases the relation of any proposed project to <br />Federal and State lava and inter-state water compacts should be clear- <br />ly determined, and hydrologic analyses should be based on these deter- <br />minations. This item required special studies in the preparation of <br />the AWR report. <br /> <br />l. Analyze the water requirements of the watershed, both for the <br />present and future. <br /> <br />Federal and State agencies, as well as local interests, are <br />concerned with various aspects of water use and the requirements <br />therefor. These uses range from irri@l!lotion, stock. water, and other <br />agricultural uses to municipal and industrial supplies and many other <br />requirements. HydrOlogic studies in this connection ~t be closely <br />coordinated with economic studies in order to predict future require- <br />ments in and adJacent to the watershed. Also, within the framework of <br />applicable State law, hydrologic studies IllUSt be coordinated with <br />economic studies in an effort to determine the highest use to which <br />limited supplies ot' water might be put. Only through a complete <br />knowledge of surface and ground water resources, together with a <br />complete picture ot' the potential uses and their relative values, <br />is it possible to uake the highest economic and social use of water <br />resources in a given watershed. <br /> <br />m. Analyze the flood damage conditions of the watershed, tak.ing into <br />consideration estimated future development of the watershed. <br /> <br />Hydrologic studies connected with the determination of flood <br />damages include studies of past flood and weather records with respect <br />to intensities, magnitudes, frequencies, depth of t'looding, duration <br />of flooding, areas inundated, seasonal occurrence, etc. Ot' equal <br />importance is the determination of property values and effects of <br /> <br />C/1-7 <br />