The parameters of a small undeveloped watershed are listed in Tables 12. 7 and 12. 8. A

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The parameters of a small undeveloped watershed are listed in Tables 12. 7 and 12. 8. A UH, and Muskingum routing coefficients are known for subbasin 3, as shown in Figure 12. 21.

TC and R values for subbasins 1 and 2 and associated SCS CNs are provided as shown.

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A 5-hour rainfall hyetograph (in cm/hour) is shown in Figure 12. 22 for a storm event that occurred on June 19, 2010. Assume that the rain fell uniformly over the watershed. Use the information given to develop an HEC-HMS input dataset to model this storm. Run the model to determine the predicted outflow at point B (Muskingum coefficient: X = 0. 15, K = 3 hours, area = 3. 3 km2).

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