Calculate flow downhill effective_retention to the channel.
mfd_flow_direction_path (string) – a path to a raster with pygeoprocessing.routing MFD flow direction values.
stream_path (string) – a path to a raster where 1 indicates a stream all other values ignored must be same dimensions and projection as mfd_flow_direction_path.
retention_eff_lulc_path (string) – a path to a raster indicating the maximum retention efficiency that the landcover on that pixel can accumulate.
crit_len_path (string) – a path to a raster indicating the critical length of the retention efficiency that the landcover on this pixel.
effective_retention_path (string) – path to a raster that is created by this call that contains a per-pixel effective sediment retention to the stream.