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<br />g. No information is availa:ble on tributary inflow into <br />the South Platte J'iiver dmmstrellLffi from the mouth of the Cache <br />la Poudre River. The isohyetal p~ttern llho= on plate 3 indi.cates, <br />however, that there probably wa" ,contribution from the right-bank <br />system of tributaries, including Boxelder, Kiowa, Bijou, and <br />Beaver Creeks, as a result of the 6 May rainfall. InfloW' from <br />these areas was probably concen1;rI~ted in the period from 6 to <br />7 May, since it is characteristj_c for these streams to produce <br />hydrographs with fast peaking Umes and short base lengths" The <br />hydrograph for the South Platte River at the Balzac gaging sta.tion <br />does not, however" indicate an Identifiable peak originating from <br />these right-bank tributaries. ~'he peak discharge of 20,500 cubic <br />feet per second that was experienced at Balzac on 9 May wall the <br />result of inflow 'l1hich occurred upstream from the Kersey gaging <br />station. <br /> <br />13. FLOOD HYDROLOGY - NORTH PIJlTTE RIVEH BASIN <br /> <br />a. General. Flooding along the North Platte River \/llS <br />caused primarily by snowme1 t runoff; rainfall runoff contrIbution <br />was minimal during the active m,il,t see.son. Monthly rainfall <br />values and comparisons with normal values for May and June at <br />selected stations in the North J'latte River basin between Glendo <br />Dam and the muth are shown in t;able "r. <br /> <br />23 <br />