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<br />In the case of a flood control reservoir emptying into a downstream <br />flood control reservoir, the outlet capicity of the upstream reservoir <br />should be sufficient to assure that its flood control space can be emptied <br />during the period when high tailwater exists due to water being stored <br />in the flood control space at the downstream reservoir, under any reason- <br />able distribution of inflows to the two reservoirs. This will assure <br />that the reservoir system can operate efficiently by making full required <br />releases from the downstream reservoir whenever water is stored in flood <br />control space at either reservoir. <br />In the case of two flood control reservoirs on separate tributaries <br />above the same damage center, the outlet capacity of each should be <br />large enough to supply target flows at the damage center with minimum <br />expected simultaneous release from the other reservoir. Again, this <br />provision is necessary to assure the capability of making full flood <br />control target flows at the damage location whenever water is 1n flood <br />control space at either reservoir. This is subject to provisions dis- <br />cussed above for cases where local runoff below the reservoirs and above <br />the damage center is so large as to warrant smaller outlet capacities. <br /> <br />5-03 <br />