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| description: | SPI measures the erosive power of surface runoff and thus, the index is a predictor variable of areas susceptible to debris-flow processes. The SPI map was generated using the following equation: SPI=ln(A*tan(S)), where A is the local upslope catchment area draining through a certain pixel in square meters and S is the local slope gradient in degrees. SPI ranges in the study area from -6.3 (yellow) to 19.1 (red). |
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| title: | Stream Power Index (SPI) |
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| culture: | en-US |
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