Calculate Flow Accumulation in QGIS using the PCRaster Tools Plugin

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With the PCRaster Tools plugin you can calculate the flow accumulation from a DEM. The video demonstrates how to convert a raster to the PCRaster format, calculate the flow direction raster (local drain direction) with the lddcreate tool and how to use the accuflux tool.

#QGIS #PCRaster #QGISHydro
  1. Hans van der Kwast
  2. Flow Accumulation
  3. Hydraulics
  4. Hydrology
  5. PCRaster
  6. QGIS
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Комментарии
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Lo hice y quedó perfecto, solo que tuve un inconveniente con relacion a el paso de (spatial), lo arreglé no guardando la capa temporal, al igual con la herramienta accuflux, tambien le puse una simbología de 1000 y quedó perfecta. Muchas gracias maestro!! :) saludos desde Guatemala.

mowcloud
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@Hans van der Kwast Thank you very much, you are doing such an amazing job, you rock 🙂

maiyourathaankarunanandara
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what is: "Traceback (most recent call last):
File "C:\PROGRA~1\QGIS32~1.3\apps\Python312\Lib\site-packages\pcraster\operations.py", line 2095, in accuflux
_pcraster._rte().checkAndExec(operator, 2)
RuntimeError: argument nr. 1 of function 'accuflux': type is scalar, legal type is ldd" when i try to make the accuflux? thank you

lorenzomonceri
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Hey thanks for all the videos, I have a problem with the lddcreate process. QGIS always crashes when i run it. I am using SRTM1 data on a 1.5°*1.5° scale. Is it because older system can't handle it or is there some way of troubelshooting?

RubenThe
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Thanks Hans. What is the next step to calculate Height Above Nearest Drainage use this as a start?

HermanBooysen
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Thanks for your tutorial videos. Could you please make video of geomorphic indice analysis using drainage basin for active tectonic study?

febryantmasulili
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heyyy i am struggling with the plugin... when i run iddcreate, there is always the error "PCRaster library is not available"
Do you have an idea what i am doing wrong? i really dont know :(

konstjanix
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Hi all,
lddcreate crashed all the time for me.
The problem was that I had a DEM of a basin that was surrouned by more elevated topography. So, there was no natural outflow. In order to get lddcreate working I needed to "fll sinks" using SAGA. However, sink-filling algorithms typically attempt to remove all depressions (sinks) in a DEM, including the natural basins, by artificially creating an outflow point to ensure hydrological continuity. So it works now, but my basin is gone. Just in case someelse has this problem, you now know the reason.

toffer
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Dear sir, may I know this PC raster tool is also free of charge?

soknethlim