- 2 9 There Are 10 Raingauge Stations Available To Calculate The Rainfall Characteristics Of A Catchment Whose Shape Can B 1 (43.23 KiB) Viewed 86 times
2.9 There are 10 raingauge stations available to calculate the rainfall characteristics of a catchment whose shape can be approximately described by straight lines joining the following coordinates (distances in kilometres): (30, 0), (80, 10), (110, 30), (140, 90), (130, 115), (40, 110), (15, 60). Coordinates of the raingauge stations and the annual rainfall recorded in them in the year 2001 are given below. (0, 40) 132 6 (0,80) 124 Station 3 Co-ordinates (50, 0) (140, 30) Annual Rainfall (cm) 136 93 Station 7 8 Co-ordinates (40, 50) (90, 30) Annual Rainfall (cm) 156 128 Determine the average annual rainfall over the catchment by using isohyetals. 5 (90, 140) 85 10 (140, 80) 81 9 (90,90) 102 (40, 80) 128