Question

please answer the following. be sure to draw the different areas using the Thiessen method

The mean areal precipitation is to be calculated for the basin shown in below. There are seven rain gages in the study area, and the rainfall measured at each of the gages during a 1-hr interval is as follows: Station А B с D D F G Rainfall (in.) 2.8 3.5 4.2 5.1 6.0 4.5 3.9 1) Use Thiessen method to identify the representative area of each station. 2) Determine the average areal rainfall over this basin by the arithmetic method B F. G

Answer 1

4. Representative Areas for Each station. -A1 Ay A3 E B B A2, AS AT AG It step 1 content all stention by forming triangles. (median) 2) Then drop each offset from side of every triangle. ( prepandinlar bisector)

Arithemetic method 2. Average rain fall 2.8+3-5 +4.2 +5.1 +6+4.5+3.9 le 7 p = 4.2857 С