Surface and Gradient sim_hydrology QgsProcessingParameterRasterLayer|MASK|Mask|None|False QgsProcessingParameterRasterDestination|SURF|Surface QgsProcessingParameterRasterDestination|GRAD|Gradient QgsProcessingParameterNumber|SURF_E|Surface Approximation Threshold|QgsProcessingParameterNumber.Double|0.001000|False|0.000000|None