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<br />o <br />(::: <br />.... <br />w <br />c.o <br /> <br />- <br />- <br /> <br />flooding thereon, agricultural crop distribution and yield within the <br />flood plain areas and various other economic determinations. Therefore, <br />hydrologic and economic studies of the various agencies directed toward <br />the determination of flood damage conditions of the watershed should be <br />closely coordinated and should produce comparable results through the use <br />of Wliform procedures and a minimum of duplicated effort. There was con- <br />siderable controversy on this matter during the preparation of the AWR <br />report. Special studies were set up in an effort to solve the controver- <br />sies but only limited success was achieved. <br /> <br />n. Establish operational procedures both for projects existing and <br />anticipated for the future to best serve all useful purposes. <br /> <br />Generally existing projects have been planned for a specific purpose <br />or purposes and facilities provided in them are based on satisfying these <br />purposes. However, changing the regimen of flow of a stream can affect <br />many interests, some beneficially and others detrimentally by the same <br />regulation. This is being recognized and comprehensive provisions in- <br />cluded, insofar as possible, in present-day planning. Also, in many <br />instances the operational procedures of existing projects are being <br />modified in light of changed conditions, and in some instances the <br />facilities converted to other purposes in order to make the best use of <br />these projects. Agencies and interests responsible for planning of <br />projects and their operation should keep fully informed of the conditions <br />surroWlding the operation of their projects and should modify their <br />operation, within existing authority, to UAke the best use of the facilities. <br /> <br />- - - - - - - - - - - - - - - - - - - - - - - - - - - - - <br /> <br />The Ad Hoc CoIlUllittee recognizes that for application to actual vater <br />use and control each element of hydrologic analysis listed (items a to n, <br />inclusive) and discussed above would receive varying amounts of study based <br />on the degree of accuracy required consistent with the scope and purpose of <br />the existing and proposed development in the watershed. <br /> <br />II. PRESENT STATUS OF RESEARCH PROGRAMS UNDER WAY TO DETERMINE <br />EFFECT OF UPSTREAM RESERVOIRS UPON DOWNSTREAM WATER YIELD <br /> <br />With respect to the third part (c) of this ad hoc committee's assign- <br />ment, the following facts were ascertained: <br /> <br />The general problem is the subject now of much more study than a few <br />years ago. The interest is greatest in this climatic zone where stream- <br />flow normally amounts to less than 20 percent of rainfall and where practices <br />which can reduce streamflow may be significant in the regional economy. <br />Withi~ the AWR Basins, at least, the problem area lies generally between <br />the 96th meridian and the Rocky Mountains with the High Plains portion of <br />lesser importance because streamflow contribution is so small that there <br /> <br />C/l-B <br />