Question: The tables below give area?elevation data for a drainage basin and the average annual pre-cipitation measured at six gauges in the basin. The basin has

The tables below give area?elevation data for a drainage basin and the average annual pre-cipitation measured at six gauges in the basin. The basin has an area of 269 km2, a mini-mum elevation of 311 m, and a maximum elevation of 1,600 in.

a. Compute the average annual precipitation for the basin using the hypsometric method.

b. Compare the value computed in (a) with the arithmetic average. Area-Elevation Data Elevation Range (m) 311-400 400-600 600-800 800-1,000 1,000-1,200 1,200-1,400 1,400-1,600

Area-Elevation Data Elevation Range (m) 311-400 400-600 600-800 800-1,000 1,000-1,200 1,200-1,400 1,400-1,600 Precipitation Data Gauge 1 2 SAW|N 3 4 5 6 Fraction of Area in Range 0.028 0.159 0.341 0.271 0.151 0.042 0.008 Elevation (m) 442 548 736 770 852 1,031 Average Annual Precipitation (mm) 1,392 1,246 1,495 1,698 1,717 1,752

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