Surface, Gradient and Concentration sim_hydrology QgsProcessingParameterRasterLayer|MASK|Mask|None|False QgsProcessingParameterRasterDestination|SURF|Surface QgsProcessingParameterRasterDestination|GRAD|Gradient QgsProcessingParameterRasterDestination|CONC|Concentration QgsProcessingParameterNumber|SURF_E|Surface Approximation Threshold|QgsProcessingParameterNumber.Double|0.001000|False|0.000000|None QgsProcessingParameterNumber|CONC_IN|Inlet Concentration|QgsProcessingParameterNumber.Double|5.000000|False|0.000000|None QgsProcessingParameterNumber|CONC_OUT|Outlet Concentration|QgsProcessingParameterNumber.Double|3.000000|False|0.000000|None QgsProcessingParameterNumber|CONC_E|Concentration Approximation Threshold|QgsProcessingParameterNumber.Double|0.001000|False|0.000000|None QgsProcessingParameterNumber|GRAD_MIN|Minimum Gradient|QgsProcessingParameterNumber.Double|0.000000|False|0.000000|None QgsProcessingParameterEnum|NEIGHBOURS|Neighbourhood|[0] Moore (8);[1] Neumann (4);[2] Optimised|False|0