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<br />Obstructions to flood flows within the study reach include natural obstruc- <br />tions such as brush and trees growing in the ftoodplain and also the State <br />Highway ~6 bridge. During floods these obstructions increase the flooding <br />depths which inundate larger lend areas. <br /> <br />TABLE 3 <br /> <br />RAINFALL Dl;pnl FOR VARIOUS StOR.'l. DURATIONS <br />AND FREQUENCIES <br /> <br />Climate <br /> <br />Official Weather Bureau monitoring stations ece maintained near the Towns <br />of Parker, Elbert, and Kiowa. These three stations provide reeords which nre <br />representative of the weather conditions in the Running Creek basin. A compo- <br />site analysia of the available weather data provides the following general <br />climate information. <br /> <br />The climate of the area is .lightly <br />than the Denver metropolitan Orca. Thi. <br />of the Running Creek basin. SUYIlOerhigh <br /> <br />cooler and receive. mare precipitation <br />is largely due to the higher elevation <br />o <br />temperatures exceed 90 F. an average <br /> <br />of 34 days per year. Winter iow temperatures drop below freezing an avera~e <br />of 184 days per year. ~an daily maxilllUm temperatures range from 430 F. in <br />Jaltuary ~o 870 F. in July. Strong winds occur frequently in the winter and <br />spring. These ~ind" tend to dry out soi!s which arc not well supplied with <br />moisture du~ to the low annu~l prccipitation. <br /> <br />The Running Creek basin receives approximat~ly 10 inches of its 16 inch <br />average annual precipitation during the April through September period. Summer <br />rainfalL is largely from thunderstorm activity which produces intense, local- <br />ized storms. Floods on streams on the eastern plains arc caused primarily by <br />~hunder.torms which yield heavy rainfall over short periods of time (high intensity). <br /> <br />The National Weather Service has compiled many ye~rs of rainfall record. <br />for the eastern pLains area and has used them to develop probabilities of <br />receivin~ a ~iven depth of rainfall Ln a given time. Table-J on tho following <br />pag~ Lists these rrlationships for the Running Creek basin. <br /> <br />-15- <br /> <br />-14- <br />