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How to use FlowAccumulator to get the stream as in ArcGIS?
See original GitHub issueHi,
I’m trying to use landlab to simulate the hydrography in our small catchment.
The Raster that I use is created in ArcGIS.
Here is my question:
When I using this ‘OverlandFlow’ component,
fa = FlowAccumulator(mg,'topographic__elevation', flow_director='D8', runoff_rate=None, depression_finder=None)
no matter which flow_director I used, it could not produce the same flow path as I did in ArcGIS. Instead, there are a lot of nodes that just hold the water without flowing downstream. 😦
This is our catchment with an area about 1.5 km^2.
zoom in:
and further, the channel profiler is also failed because no such drainage could be produced…
Is there anyone who could help me with this? Thanks a lot. Hong
Issue Analytics
- State:
- Created 3 years ago
- Comments:6 (4 by maintainers)
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@awickert JINX
One other thing to note … if you plan to use an overland flow routine, rather than steady state flow, many of them only use D4 flow routing and don’t work with D8. You can fill sinks for D4, but it will then for sure look different than what ARC shows you.