Complete QGIS Watershed Delineation Tutorial

[@geodeltalabs]

The QGIS version that I'm using in this tutorial is QGIS 3.34 Prizren (LTR), In case if you want to make sure you have the same version installed at your end to potentially not have any version conflicts.

[@loicndzang3839]

Thanks Sir for your content! I follow you since 4 years. I meet issues using Saga tools in qgis. all Saga algorithms used to derive river networks and catchment delineation don't work in all QGIS version. Could you please help fix that issue?

[@LordLegion-d4b]

@@loicndzang3839 did u find a fix for the saga upslope area?

[@loicndzang3839]

@@LordLegion-d4b not yet. I used the Saga GIS to do my project I better do it in QGIS but saga algorithm don't work anymore

[@LordLegion-d4b]

@@loicndzang3839 whats saga his? Another software? Hope u help me on this

[@MarioAlejandroRodriguezBarros]

Thank you very much. Your tutorial is amazing and the explanation is very well-detailed. I hope you continue developing this content.

[@geodeltalabs]

Thank you, I will

[@nedsonkaunda5927]

Finally I can design my bridges from scratch..thanks GeoDelta

[@abutaher5612]

Excellent video

[@alfredomartinez8894]

i HAVE BEEN SPENDING LOT OF TIME WATCHING TUTORIALS OF LATAM, BUT MUCH OF THEM AREN'T ABLE TO EXPLAIN CORRECTLY WHAY THEY'RE USING SOME TOOLS AND THE PRODUCT OF THESE STEPS I'VE FOLLOWED WERE A MESS. THANX ALOT GEO DELTA, YOUR MY HERO (that data it that makes me feel mor confindent to start my tesis)

[@ajaynair1253]

Thankyou for uploading such a nice educative content. It is very useful

[@davidgoldmann7695]

thank you for this video, it was a great help for me

[@RODELPILLE]

This is very Helpful thank you sir.

[@zees1804]

Thank you for this very informative video. Do you, by any chance, know how to extract the lineament density of a catchment from a 1m DEM? It would be useful to have a tutorial on this topic. Thank you!

[@coopernik]

Thanks for the great content

[@geodeltalabs]

No worries!

[@gayathrihasitha6253]

Thank you so much!

[@aminmneina6317]

Thank you very much for the step-by-step tutorial. I was able to generate the streams network but my catchment area delineation step resulted in rubbish. The watershed resulting from the UpSlope tool were butchered (too small, or just a line, outside the streams). I've repeated it so many times and made sure the coordinates are correct, but same rubbish results

[@hugolicaon442]

Awesome tutorial dude! I have a doubt, save the raster with the "Save as" have the same effect as the Warp(reproject)?

[@travelwonder]

The ta_hydrology_upslope_area file does not exist, instead a file ta_hydrology_upslope_height is visible in QGis folder. Do you have any idea in this case as error message is exactly same as you mentioned.

[@AsheniAbeysinghe-wm3ss]

Same question. Please let me know how to fix this issue😒

[@BISAGN-gd9sc]

When it is required to use Projected Co-ordinate system and UTM zones are unknowm, just use EPSG:3857. it is pseudo-mercator projection. It is similar to UTM projection. EPSG:3857 has unit meters.

[@pavlovezdenetsky7824]

I proceeded all along, but has not got any stream network, just random pixels. Also the suggested approach seems not to work if one has to delineate the catchment area of the reservoir and the river dale is wide.

[@aminmneina6317]

I was able to generate the streams network but my catchment area delineation step resulted in rubbish. The watershed resulting from the UpSlope tool were butchered (too small, or just a line, outside the streams). I've repeated it so many times and made sure the coordinates are correct, but same rubbish results

[@pavlovezdenetsky7824]

@aminmneina6317 I used HEC HMS and the results obtained were very good. QGIS is not suitable for hydrology. My professor was right. Use HEC HMS. Easier and much more precise.

[@AileenFernandez-yd4og]

Thank you for this helpful tutorial. Could I ask for your assistance with an error message I encountered while processing the channel network and drainage basin: 'The following layers were not correctly generated.' Your help would be greatly appreciated.

[@geodeltalabs]

A potential fix for this that may work is making sure you are running one of the recent versions of QGIS (such as QGIS 3.34 LTR - Prizren, which is what I happen to use currently), and then install SAGA Next Gen Provider plugin on that. You might be able to circumvent the version issues that way.

[@AileenFernandez-yd4og]

⁠​⁠@@geodeltalabsI installed QGIS 3.34 Prizren version and it works perfectly. Thank you so much.

[@bensekuye7276]

hOW DO YOU INDICATE DIRECTION OF FLOW

[@fbstar26]

my fill sinks(wang&liu) process is very long, it has been 2 hours already, any idea why this happens?

[@neelmoudgil6061]

seems like an issue with the input DEM? mine took 10 seconds

[@Pk0601]

sir could you please make watershed delineation map of Pennar river sir

[@ghislainhenri1694]

Merci

[@geodeltalabs]

You are welcome!

[@raghvendrapatel6447]

Sir I request you to please provide us advance class of RS and GIS we will paid for that.... Thank you

[@Geo_RmR]

I have followed every step precisely but I'm getting an error saying "COORDINATES OF TARGET POINT OUTSIDE DEM" any solution please 😢😢😢😢😢😢😢😢😢

[@aminmneina6317]

I ran into that too. Check your DEM coordinate (through it's properties). now your Canvas coordinates are probably different from that (found on the bottom right corner of your screen). click on your Canvas coordinates and change them to your DEM's coordinate system