Stream Power Index
ta_hydrology
QgsProcessingParameterRasterLayer|SLOPE|Slope|None|False
QgsProcessingParameterRasterLayer|AREA|Catchment Area|None|False
QgsProcessingParameterEnum|CONV|Area Conversion|[0] no conversion (areas already given as specific catchment area);[1] 1 / cell size (pseudo specific catchment area)
QgsProcessingParameterRasterDestination|SPI|Stream Power Index