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<br />. <br /> <br />. <br /> <br />quality and other sanitary characteristics of water, Some of these <br />latter data are in published form and others have not been, There is <br />need for compiling all data into usable form as well as for an expanded <br />collection program, More attention is needed regarding minimum flows <br />and their frequency in the pollution abatement problem, Where organic <br />pollution is of concern, the self-purification capacities of the stream <br />need to be determined, Better use would be made of quality of water <br />data if the collection and utilization were better coordinated, <br /> <br />k. Establish the relationships of water laws and rights to water use <br />and control development in hydrologic analyses. <br /> <br />This is principally a matter to,be coordinated between State <br />and local interests on the one hand and Federal agencies which are <br />planning specific projects or measures, Adequate outlet capacities, <br />under empty reservoir conditions, to meet downstream demands by vested <br />rights must be provided in the case of any proposed reservoirs, Pro- <br />posed canals which intercept natural streams must be so planned as to <br />not 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 Federal <br />and State laws and inter-state wRter COf<t\lflCts should be clearly de- <br />termined, and hydrolo~ic analyses should be based on these determina- <br />tions. This item required special studies in the prenaration of the AWR <br />report, <br /> <br />1. Analyze the wB-ter reql'irem2nts of the watershed, both for the <br />uresent and future. <br /> <br />Fcd8ral and State agencies, as w811 as local interests, are <br />concerned with various aspects of water usr, and the requirements there- <br />for. These uses r8ngc from irrigation, stock water, and other agri- <br />cultural uses to municipal anrl industrial suoplies and many other re- <br />quirements. Hydrologic studies in this conn~ction must be closely co- <br />ordinated with economic studies in ord"r to predict future requirements <br />in and adjacent to the watershed, Also, within the framework of ap- <br />plicable State law, hydrologic studies must be coordinated with economic <br />studies in an effort to determine the highest use to ~lich limited <br />supplies of water might be put, Only throurh a complete knowledge of <br />surface and ground water resources, together Witil a complete picture of <br />the potenti21 uses and their relative valu0s, is it possible to make the <br />highest economic and social use of water r0source~ in ~ given watershed, <br /> <br />m. Analyze the flood damage conditions of tho watershed, taking into <br />consideration estimated future developm2nt of the watershed, <br /> <br />Hydrologic studies connected with the determination of flood <br />damages include studies of past flood and woath0r records with respect <br />to intensities, magnitudes, frequencies, d2pth of flooding, duration <br />of flooding, areas inundated, seasonal occurrence, etc. Of equal <br /> <br />- 7 - <br />