ChannelNetworkRS: Build channel network using RSAGA

In ECCC-MSC/Basin-Delineation: Finds upstream area and upstream stations

Description

Builds a channel network from a DEM.

Usage

ChannelNetworkRS(in_DEM, init.grid, out.shape, upstr_threshold = 35000,
  saga_env, verbose = F)

Arguments

in_DEM	character string pointing to the *.sgrd path of a (hydrologically appropriate) DEM
init.grid	(optional) character string pointing to a flow accumulation *.sgrd file. If not supplied, it will be created.
out.shape	character string naming a shapefile open for writing which will be the channel network
upstr_threshold	integer, number of upstream cells required to initiate channel growth. A smaller number will yield more channels and will snap to smaller streams. Larger numbers will produce only major channel branches. For a 50k DEM, numbers between 20,000 and 50,000 are appropriate to reproduce the main channel network without many small branches.
saga_env	A SAGA geoprocessing object. Suggested version is 2.2.2. character string Mosaic 'grid_tools' module 3

Value

character string path to channel network shapefile

ECCC-MSC/Basin-Delineation documentation built on June 9, 2019, 7:29 p.m.