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Thiessen Polygon method is a weighted average mean method used to calculate average rainfall. The catchment area is divided into subcatchments using the Thiessen polygon method.

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12y ago
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6mo ago

To calculate rainfall using the Thiessen polygon method, you first need to divide the area into polygons based on rain gauge locations. Then, calculate the area of influence of each rain gauge within its polygon. Finally, you can determine the weight of each rain gauge based on its influence area, which is used to calculate the average rainfall for the entire region.

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Q: How do you calculate rainfall using the thiessen polygon method?
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What is the thiessen polygon and what it used for?

Thiessen polygons are a method of dividing an area into polygons based on proximity to a set of points. They are used in spatial analysis to delineate areas of influence around specific points, such as weather stations or monitoring sites. Thiessen polygons help to visualize and analyze spatial patterns and relationships in data.


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the watershed map of an area with annual precipitation from the upper left clockwise are 1.9,2.1,1.8,1.9,2.1,2.2 inches respectively.draw the theissen polygon map for the watershed and if the areas for each rainguage,again clockwise from upper left are 65,150,55,140,215,270 acres respectively,calculate the annual average precipitation for the area


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