Channel Network and Drainage Basins ta_channels QgsProcessingParameterRasterLayer|DEM|Elevation|None|False QgsProcessingParameterNumber|THRESHOLD|Threshold|QgsProcessingParameterNumber.Integer|5|False|1|None QgsProcessingParameterRasterDestination|DIRECTION|Flow Direction QgsProcessingParameterRasterDestination|CONNECTION|Flow Connectivity QgsProcessingParameterRasterDestination|ORDER|Strahler Order QgsProcessingParameterRasterDestination|BASIN|Drainage Basins QgsProcessingParameterVectorDestination|SEGMENTS|Channels QgsProcessingParameterVectorDestination|BASINS|Drainage Basins QgsProcessingParameterVectorDestination|NODES|Junctions