1. The watershed covers N00 ha in Rede County, Ohiowa State. Sixty percent is a hydrologic soil group A. Forty percent is of group B soil. The event is a 25-year frequency, 24-hour storm with total rainfall of N/2 inches. All group B soil lands and fifty percent of group A soil are of forest land in fair hydrologic condition. The rest of the watershed is woods-grass combined land in good hydrologic condition. The 5-day antecedent rainfall in the dormant season is 10 mm Compute curve number (CN), and run off (0) In a rain event in the basin Rainpourshed, total rainfall in five hours is 7.5 inches. The infiltration rate is assumed as 0.5 in/hr for the whole event. If the total runoff from the event is 10,000 cfs-hr, what is area of the basin Rainpurshed 1 cfs= 1.008 ac-in./hr. in acres?