A small urban watershed located in north of Iraq has four rainfall gauges as located in the figure below. The total rainfall recorded at each gauge during a storm event is listed. Compute the average rainfall for this storm using Thiesson method. Raingauge Rainfall (cm) 8.28 7.42 7.65 7.75 B D 4 km 4 km 1 km 4 km 4 km 1 km 3 km

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Flooding is a temporary overflow of water that submerges or covers the the usually dry land. It can also be defined as the overflow of the excess amount of water that covers a huge area of land which is normally dry.