1) Figure one is normal annual precipitation map with Isohyetal lines. In the site shown, no stream flow is available. However, flow duration curve for the streams in the river basin is presented in figure two with plan metering data presented in table one .Annual runoff coefficient is 0.73. Estimate: a) The average annual discharge for the site. b) Flow values for Q10, Q30, Q50, Q80, Q90 Pa.Aa P. Weighted average precipitation Pa and Aa are precipitation and area between Isohyetal lines. Area Designation TABLE 1 Values of Planimetered Areas from the Normal Annual Precipitation Map Average Value of Precipitation Planimetered Between Isohyetal Area on Map Percent of Lines (in.) (in) Total Area 60 0.46 1.24 60 8.16 22.01 55 27.41 73.92 50 1.05 2.83 37.08 100.00 2) Prepare flow and head duration curve for the following flow and head duration. Q(m/s): I. 655 185 420 1150 110 55 87 15 4150 2010 315 360 75 30 65 950 H(m): 80 72 90 115 86 105 68 75 63 II. For a 3 identical unit power plant, with total discharge equal to Q(30%) and head equal to H(50%), calculate the theoretical capacity of each unit in kW, and suggest suitable type of turbine of the plant Idaho Co. 50 Shoshone Co Clearwater Co. 60 N. Fork Clear Outflow station Dearwater Co. Figure Normal-annual-precipitation map Meadow C water Cayouse Cr. Long Cr. Kelly Cr. Lake 11500' -4700' 60 SCALE: 1:250,000 -50 Q, Discharge in C.F.S. 100 1000 10,000 10% 30% 50% 80% 90% 10 100 1000 Average annual runoff in C.F.S. Figure 2. Parametric flow-duration curve