How to calculate the cumulative flow area and the Topographic wetness index in arcgis?

Jeison Rincón Garzón @Jeison_Rincon_Garzon

11 November 2016 1 1K Report

In what units is the cumulative flow generated in arcgis?

Jeison, there is a toolbox called "Geomorphometry & Gradient Metrics". However,I would recomend that you calculate the TWI using Saga GIS (Free Open Source software) because of there are severeal options to calculate flow acumulations and TWI. For example, SAGA-TWI is more realistic because of it is based on a modified catchment area calculation, which does not think of the flow as very thin film. Furthermore, everything is well-documented in SAGA GIS.

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