[GRASS-dev] [GRASS GIS] #1740: r.watershed: multiple outlets points at once for watershed delineation

[GRASS GIS]

#1740: r.watershed: multiple outlets points at once for watershed delineation
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  Reporter:  hzambran     |       Owner:  grass-dev@…              
      Type:  enhancement  |      Status:  closed                   
  Priority:  normal       |   Milestone:  7.0.0                    
 Component:  LibRaster    |     Version:  unspecified              
Resolution:  fixed        |    Keywords:  r.watershed, consider    
  Platform:  All          |         Cpu:  Unspecified              
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Changes (by mmetz):

  * status:  new => closed
  * resolution:  => fixed


Comment:

 Replying to [ticket:1740 hzambran]:
 > [...] there is a feature that I'm missing in order to start using it as
 a replacement of similar functionality available in TauDem5
 (http://hydrology.usu.edu/taudem/taudem5.0/):
 >
 > The possibility of providing, in addition to the DEM file, an optional
 shapefile with the known locations of the desired outlet point(s), in
 order to be able to define the watersheds not only by using a threshold
 for the upstream area, but also by using the location of all the outlet
 points present in the main study area.
 >
 > It would be great if you could consider implementing such a feature for
 the official release of Grass7.
 >
 > This feature should be able to:
 >
 > -) move all the outlet points provided by the user to nearest cell
 belonging to the river network.
 >
 > -) apply the current 'r.watershed' to each one of the outlets points
 obtained in the previous step.

 The addon module r.stream.basins already defines the catchment areas for
 one or more outlets, using the output of r.watershed. You could then set a
 MASK for each catchment and do further processing with the r.stream.*
 modules. BTW, you can also use the output of !TauDem (DEM + flow
 accumulation) as input for r.stream.extract and then continue with other
 r.stream.* modules.

 Markus M

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Ticket URL: <http://trac.osgeo.org/grass/ticket/1740#comment:1>
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