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<br />flood-producing populations. The more frequent snowmelt events tend to ~ <br /> <br />be more predictable and less severe, while the rainfall-generated <br /> <br /> <br />floods are extremely variable and can reach spectacular proportions. <br /> <br />DISCHARGE-PROBABILITY RELATIONSHIPS <br /> <br />GENERAL <br /> <br /> <br />Discharge-probability profiles for the Cache la PoudreRiver <br /> <br /> <br />upstream from the North Fork Cache la Poudre River, the North Fork <br /> <br /> <br />Cache 1a Poudre River from Halligan Reservoir to its confluence with <br /> <br />the Cache la Poudre River, and for Lone Pine Creek were developed from <br /> <br /> <br />MITCAT ,1Ilodels of the mountainous portion of the basin. The discharge <br /> <br /> <br />profile for the plains was obtained from the 1973 hydrologic study. <br /> <br />CACHE LA POUDRE RIVER UPSTREAM FROM THE NORTH FORK CACHE LA POUDRE <br /> <br /> <br />RIVER <br /> <br /> <br />Discharges for the 422 square miles of contributing area of the <br /> <br /> <br />Cache la Poudre River basin upstream from the North Fork Cache la <br /> <br /> <br />Poudre River were obtained by inserting the 10-, 50-, 100-, and <br /> <br /> <br />500-year rainfall values into the calibrated MITCAT model. An average <br /> <br /> <br />June base flow of 1,700 cubic feet per second was added to the modeled <br /> <br /> <br />discharges. Discharges for the Cache la Poudre River from Poudre Park <br /> <br /> <br />to its confluence with the North Fork Cache la Poudre River are given <br /> <br /> <br />in table 3. The gulches referred to are shown In figure 4. <br /> <br />14 <br /> <br />~ <br />