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<br />o <br />(~.., <br /> <br />a field ot universal interest as hydrology is a most difficult and <br />complex 118tter. Even though action amongst the various interests could <br />be obtained, the present status and historical development of poliCY, <br />criteria and procedures imposes 118Jor problems of an administrative and <br />engineering cbaracter in hydrologic coordination. <br /> <br />.... <br />W <br />00 <br />00 <br /> <br />Lacking a central and single orsanization responsible tor the <br />objective evaluation ot the hydrologic problems and the development <br />ot a plan and works to resolve these problems, the science of hydrologic <br />. analysis has grown trom many sources and has been based on reaching <br />solutions for a variety of problems. As a result, hydrologic coordina- <br />tion has also been somewhat haphazard and came about largely by a COllllllOn <br />need for reaching solutions to the problems and the obvious fact that a <br />variety of interests in a watershed IllUBt be served. Although hydrologic <br />coordination has advanced to a large extent, particularly in recent years, <br />the physical framework of our activities and interests has not allowed it <br />to reach the stage where it could be said that there is entirely common <br />action in any watershed. <br /> <br />I. HYDROLOGIC COORDINATION REQUIRED - FACTS AND ANALYSES THEREOF <br /> <br />The areas of hydrologic coordination which would involve Federal, <br />State and lesser political entities as well as individuals in any parti- <br />cular watershed would include all phases of the determination of the <br />_ter resources and the IlSgnitude and frequency of floods, as well as to <br />determine the effects of various works to develop and control the runoff. <br />Particular phases of hydrologic analysis and discussions thereof which <br />would require coordination (items "a" and "b" of the assignment) in order <br />to obtain comprehensive planning and development of a watershed include <br />but are not limited to the following: <br /> <br />a. Collection of and agreement on factUAl data by wtersheda with respect <br />to the physical factors which affect the rate, amount and quality of <br />runoff. <br /> <br />This item is rather broad and, to a certain extent, overlaps other <br />items of required coordination discussed separately below. In general, <br />this particular item refers to basic analyses of streamflow and rainfall <br />records and other basic hydrologic data. Physical factors affecting <br />runoff include basin and sub-basin drainage areas, stream channel cross <br />sections, stream profiles, etc. Factors affecting quality of runotf might <br />include determination of natural and artificial sources of pOllution, <br />sediment source areas, etc. This item was not controversial during the <br />course of the former AWR studies. As an example of AWR cooperative efforts, <br />a compilation of basin and sub-basin drainage areas ws prepared so as to <br />standardize such figures. <br /> <br />b. Determine the areal source of runoff within the wtershed and <br />establish the runoff characteristics. <br /> <br />This item concerns the analysis of a wtershed and its various <br />component parts in order to determine noncontributing areas, rates and <br /> <br />C/1-2 <br />