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<br />. <br /> <br />. <br /> <br />importance is the detenninetion of property values and the effects of <br />flooding thereon, agriculturRJ crop distribution and yield within the <br />flood plain areas and vari0us other economic determinations, There- <br />fore hydrologic <Jnd economic stndies of the various agencies directed <br />toward the determination of flood damage conditions of the watershed <br />should be closely coordinated and should produce comparable results <br />through the use of uniform procedures and a minimum of duplicated ef- <br />fort. There was considerable controversy on this matter during the <br />preparation of the AWR report, Special studies were set up in an ef- <br />fort to solve the controversies 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 <br />purpose or purposes and facilities provided in them are based on <br />satisfying these purposes, However, changing the regimen of flow of <br />a stream can affect many intGrests, some beneficially and others detri- <br />mentally by the same regulation, This i3 being recognized and compre- <br />hensive provisions included, insofar as possibla, in nresent-day <br />planning. Also, in many instances the oncrdcional procedures of ex- <br />isting projects are bGing morlifi ed in li:)Jt of cl"'l~GU conditions, and <br />in some instances the facilities conv',lrt'3d to oth '01' purposes in order <br />to make the best use of these nro,jects. Ag"nc:Les and interests <br />responsible "or planning of projects and their operation should keep <br />fully informed of t.he conditions surrounding tll-: one.ration of their <br />projects and shoulct modify th8ir operation, '"Uhin "xintinp, authority, <br />to make the best use of the facilities, <br /> <br />The Ad Hoc Committee recognizes that for application to <br />actual water use and control each element of hj~rolo~ic analysis listed <br />(items a to n, inclusive) and discussed above would receive varying <br />amounts of study based on tho c!egr~e of accuracy required consistent <br />,,,ith the scope and pnrpose of the ""istirlf, and proposed dev2loDment in <br />the watershed. <br /> <br />II. "'RES'~NT STATUS OF RESRARCH Pf(OGRMIS UNl1\;:I( '.,hY TO DF:T'R>'1INE <br />E?FECT Of' UPSTRFAt~ RES,'R'JOIRS UPON oo-,.mS'mpAl1 WATlm YIELD <br /> <br />With resp8ct to the t.hird part (c) of this ad hoc committee's <br />assignment, the following facts wer8 ascertained: <br /> <br />The general problem i3 the ~ubject now of much more study <br />than a few years ago, The intcresL is ~r8atest in this climatic zone <br />where streamflow normally amounts to less than 20 percent of rQinfall <br />and where practices which can reduce streomflow may be significant in <br /> <br />- 8 - <br />