To estimate the storage capacity of water bodies like lakes, ponds and reservoirs, can be performed through indirect methods, which calculate the volume of water retained through cartographic information, bathymetry and a digital elevation model are required for the calculation is performed with the tools of ArcGIS 3D Analyst extension.
ArcToolbox > 3D Analyst Tools> Data Management > TIN
The next step is to establish the surface of the lake (reservoir), convert polyline to polygon the contour of the perimeter of the lake (in this exercise elevation 2044, can also be calculated for each spot elevation accumulated volume, being the mirror surface of the lake water peak, so we can determine the ratio of the area, capacity and lift, in order to trace the curves showing the behavior of the volume of the water surface, for each elevation), with Feature To Polygon tool located at:
ArcToolbox > Data Management Tools > Features
Due to the nature of an indirect method, field testing is required for reliability, another important aspect is the resolution of the input information, the results depend on the resolution of TIN (accuracy of the contour) to calculate the volume of water retained and the surface (either for the mirror up water, or for each dimension if required to analyze the behavior of the volume) with the Polygon Volume tool (in Input Surface filed place the TIN, in Input Feature Class field select the polygon mirror of water, in the Height Field leave <none>, in Reference Plane make sure that BELOW is selected, keeping all other fields default) located at:
ArcToolbox > 3D Analyst Tools > Triangulated Surface
The result can be seen in the attribute table of the polygon mirror of water (perimeter of the lake), the storage capacity shown in the Volume field in cubic meters and in the SArea field the area in square meters, this procedure it can be performed for each spot elevation, if a study of the behavior of the cumulative volume of the water surface is required.
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