Flow Width and Specific Catchment Area ta_hydrology ParameterRaster|DEM|Elevation|False ParameterRaster|TCA|Total Catchment Area (TCA)|True ParameterSelection|METHOD|Method|[0] Deterministic 8;[1] Multiple Flow Direction (Quinn et al. 1991);[2] Aspect OutputRaster|WIDTH|Flow Width OutputRaster|SCA|Specific Catchment Area (SCA)