1- There are 4 meteorological station in a watershed to measurement of the precipitation. The surrounding area of each station is measured by using Thiessen method as 5, 10, 15, and 20 km2 respectively for Station 1, 2, 3, and 4. If the annual precipitation values are 200, 180, 170, and 150 mm respectively for Station 1 to 4, determine the mean annual precipitation of the watershed by using the Thiessen method.
Reservoir and Streamflow Routing
In hydrology, a reservoir is usually a natural pond that is enlarged or made using a dam to keep the water clean. Reservoirs or dams can be constructed in several ways, including controlling the existing watercourse, disrupting the watercourse to form embayment within it, by digging or building any number of retaining walls.
Water Resource Systems Analysis
Water resources are natural water sources that may be as useful as water sources. 97% of the world's water is saltwater and only 3% is pure water; just over two-thirds of this ice sheet is located in glaciers. The remaining pure frozen water is found primarily as groundwater, with only a small fraction present above the ground or in the air. Natural sources of freshwater include surface water, under river flow, groundwater, and ice water. Artificial water sources can include treated wastewater (recycled water) and saline seawater.
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