Question

2. An urban drainage basin configured in a 10 km by 10 km square has three rain gages, whose locations are plotted on the map below. Construct the Thiessen Polygon Network directly onto the drainage basin map. Determine polygon areas using geometry-ArecangleLxW and Arapezoid 0.5(a+b h-then compute the Thiessen weights for each rain gage. Finally determine the mean areal precipitation for a large thunderstorm yielding rainfall depths of 106 mm, 152 mm, and 127 mm in rain gages 1,2, and 3 respectively 2.5 km. 2.5 km 2.5 km .2 .1 10 km .3 2.5 km 2.5 km 10 km

Answer 1

Solulton 丿 An urybar) d.handae bann ConLkgu.yed in a cm 3. ぐ ら1.xt_D

2 olton 4 131.125 mm