Tag Info

New answers tagged

0

Two suggestions The Australians opeate almost entirely on rainfall-driven models. Gets you around the snow melt modeling problem South Africa has a well-developed (mainly) event rainfall rainfall runoff model based on US SCS methods. For starters check the works of Prof Roland Schulze, U. Natal, Pietermaitzburg. Hope this helps bucky


0

??? presume you have no snowmelt and no baseflow to worry about? Curvve numbers only give respones to rainfall events. OTBE there are models that do this. Often/mainly out of USDA. Suggest AGWA for openers. Try SWAT.


1

If you are new to hydrology/arc I'd suggest using arc hydro (for 10.2 try download and documentation). This will give you average slope and 10-85 using Watershed Processing - Flow Path Parameters - Flow Path Parameters from 2D Line. elrobis's is correct that you may need to sample the slope more often depending on: (1) how the rivers were defined (think ...


2

I have a tremendous respect for GRASS and the r.tarraflow algorithm and I'm sure that given enough effort, you would be able to make it work for this application. But as an alternative, I develop a cross-platform free and open-source GIS called Whitebox Geospatial Analysis Tools (download here). Here is an example for how to use it for hydrological ...


0

If you're already familiar with the upstream trace tools, you should be able to apply the following steps: Create a constant raster. A constant value of zero is a convenient number. Subtract the elevation raster from the constant raster, leaving you with an inverse of the elevation raster. If you used a constant value of zero, your inverse raster is now a ...


1

There is a tool in the free and open-source (GNU GPL licensed) GIS Whitebox Geospatial Analysis Tools that can identify the flowpath from any point or collection of points specified either as a ShapeFile or as a categorical raster. The tool is called Trace Downslope Flowpaths: The tool takes a D8 flow pointer (flow directions) grid as an input, which ...



Top 50 recent answers are included