Stream Power Index
O.Conrad (c) 2003
Calculation of stream power index based on slope and specific catchment area (SCA).
SPI = SCA * tan(Slope)
References:
Moore, I.D., Grayson, R.B., Ladson, A.R. (1991):
'Digital terrain modelling: a review of hydrogical, geomorphological, and biological applications'
Hydrological Processes, Vol.5, No.1
Parameters
- Grid system
Grid system
- Grid system
- Slope
Input Grid
-
- Catchment Area
Input Grid
-
- Stream Power Index
Output Grid
-
- Area Conversion
Choice
-
Available choices: no conversion (areas already given as specific catchment area), 1 / cell size (pseudo specific catchment area)