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13. Volume computation
13.3. Contour method
This method is typically used for soil depots. The geometry is quite similar to the method of cross sections but this case the areas of closed polygons should be multiplied by the height difference between the contour lines.
Take a look at to the soil depot in the picture:
Its surface can be described by contour lines as well:
Its volume can be calculated as it is shown in the table
| RL [m] | area [m2] | volume [m3] |
|---|---|---|
| 123.50 | 0.81 | |
| 123.00 | 27.39 | 7.1 |
| 122.50 | 53.29 | 20.2 |
| 122.00 | 85.46 | 34.7 |
| 121.50 | 128.14 | 53.4 |
| 121.00 | 249.00 | 94.3 |
| in total | 209.6 |