Excellent tutorial. Explained in a simple manner.

This was so comprehensive and excellent. Preparing my thesis now and the software i tried to use to delineate my catchments wasn't working properly. This saved me. Cheers

@geodeltalabs

3 жыл бұрын

Glad you liked it!

Thank you, you just help me through by following exactly what you do here. I always come back to you whenever I forgot something he he...I even bookmarked this video.

Thanks a lot. Your explanations of each step were very precise.

Thank you for the lecture. May God bless you.

Fantastic tutorial, hats off !!

This is exactly what I needed! Thank you so much for this, it's saved my life! 😊❤❤

@shivimridula7486

3 жыл бұрын

Can u help me, my fill sink is not working, keep showing errors

An amazing video - so informative and descriptive. Thank you

This tutorial is excellent. I also appreciate your overview on stream orders 👏🏼

@geodeltalabs

9 ай бұрын

Glad it was helpful!

thanks for the wonderful tutorial sir.

Well explained.. Thank you so much, I have been wanting this for so many days

@geodeltalabs

3 жыл бұрын

Glad you found us! :)

Thank you very much. This is a very useful tip for deriving catchment area using QGIS. I'm excited to try this one.

@geodeltalabs

3 жыл бұрын

You are welcome 🙂

Great Work! Salutations to your way of explanation. Thanks

Your videos are very helpful. Thanks

Great video, clear and neat!

Great tutorial ,very helpful

Thank you very much for your crystal clear explanation.

@geodeltalabs

3 жыл бұрын

You are welcome :)

Very Good, Thank you , great job!!!

Great tutorial. Much appreciated. Kindest regards.

@geodeltalabs

3 жыл бұрын

You are welcome :)

You have been extremely helpful! Thank you

@geodeltalabs

3 жыл бұрын

Glad you liked it!

Great video. Thanks!

wow. West Malaysia. nice to have tutorial from Malaysia :D

Thanks a lot, very pedagogical and easy to understand

@geodeltalabs

2 жыл бұрын

Glad it was helpful!

very clear and useful! thank you

Thank you sir. So helpful

Man, thanks for usefull tutorial. 👍

Very informative. :)

Thank you for this.

Dear sir Excellent demonstration Please next video uploaded the Marphometric Analysis using QGIS ,,( Areal, Linner and Relief Aspect)

Nice. Thank you.

Sir wonderful video thanks

this is very cool!

Thank you for your very powerful, and well simplified and articulated demonstrations. It always saves some of us out here. Please could you do something on how to generate knickpoints in ArcMap for us? I really need to generate Knickpoints for my studies but i am unable to do it, and I cannot also lay my hands on any KZread video to lead me through the process. Thank you

This was so informative

Very helpful... Thank you kindly

@geodeltalabs

Жыл бұрын

You are welcome

So comprehensive and excellent. My college task is as the same as this video, very useful, thank you so much. i likely to give you like and subscribe

@geodeltalabs

2 жыл бұрын

Great 👍😃

Fantastic tutorial

@geodeltalabs

23 күн бұрын

Thank you! Cheers!

Thank you so much :)

Powerful tutorial

Thanks.very cool

Really good stuff. I just subscribed 😊❤

@geodeltalabs

8 ай бұрын

Welcome!!

thank you, I like how you explained in an easiest way🙂

@geodeltalabs

3 жыл бұрын

You are welcome 🙂

@shivimridula7486

3 жыл бұрын

Please help m, my fill sink is showing error

Thank you! ❤😊

Excellent ! Thanks.

@geodeltalabs

Жыл бұрын

You are welcome :)

Amazing :) thank you ^-^

@geodeltalabs

3 жыл бұрын

You are welcome :)

Thank you very much sir.

@geodeltalabs

3 жыл бұрын

You are welcome!

Quite educative, bless up

@geodeltalabs

3 жыл бұрын

You are welcome

@GeoScreen

3 жыл бұрын

@@geodeltalabs Thanks.

Thank you!

EXCELLENT!!!

Very clear explanation, thank you. If heavy rain falls, can we predict the possible flooded area by this method? I think we should also look at satellite images to detect flooded areas from the past in order to be sure. Do you suggest more?

@geodeltalabs

4 жыл бұрын

Hi, a great question! To do a more realistic and an accurate simulation of the flooded area, you will have to use some hydrodynamic simulation tools, particularly for simulating river floods. You can use what we have discussed in this tutorial to, let's say, derive the corresponding catchment which can be used in a hydrological model to simulate the discharge from that catchment under design rainfall conditions (since your interest is in simulating floods). Once you do this, you can use the simulated discharge from the hydrological model as an inflow boundary condition to a hydrodynamic model which can actually simulate the water level of the river along the river stretch which you are interested to see whether it floods or otherwise. If you use a 1D hydrodynamic model like MIKE 11, you will only be able to simulate the water level along the river banks, and by seeing how high the water level rises over the banks, you might be able to get an idea of the stretches of the river which can actually flood under the given inflow boundaries. However, if you want let the flood water move into the flood plain, you will have to use a 2D hydrodynamic model such as MIKE 21 + MIKE 11 or HEC-RAS (recent versions) to see how much of an inundation happens in the adjacent flood plains. And yes, you may use satellite images to sort of validate your hydrodynamic models by checking whether the model is able to simulate the flood extents as closely as possible to the real historical floods :)

@ata1088

4 жыл бұрын

@@geodeltalabs Thank you very much. That is really helpful :)

Excellent Thx

great tutorial. How to fix th error saying "layers were not generated correctly" in the Fill sink execution? thanks

When I apply the fill_sinks function, nothing changes in my data set. It has the same values as the DEM before. As soon as I apply the Strahler-tool, I get only a diffuse image (with 12 Strahler-classes) and no flow lines even after filtering for exclusively higher Strahler-orders (Strahler-order >=9). What can be the reason for this?

It's AWESOME

Sir, kindly help me in determining the longest stream among the channel network in a catchment area.

how to calculate how many number of 6th order streams are present in basin?

thanks you very mouch

Can we do Stream Ordering here and also a couple of exercises like Drainage Density, Ruggedness Index etc. Thanks

i am getting error in stahler order The following layers were not correctly generated.C:/Users/harshit/Desktop/major project/Final/strah.sdatYou can check the 'Log Messages Panel' in QGIS main window to find more information about the execution of the algorithm.

Sir, After run strahler order it is not showing drainage network .It shows lots of pixels in B&W.. Plz suggest. I followed all steps properly

@balpreetkaur6509

2 жыл бұрын

I am getting the same pixelated DEM. Looking for a solution to it.

Sir, I need a clarification on using filled DEM . Can we use filled DEM as the input for hydrologic modelling in models like HECRAS for the preparation of terrain?

@geodeltalabs

2 жыл бұрын

Hi, yes, it should not be a problem.

very nice

Thanks so much but how can I isolate the catchment area

Could you provide a little more detail about the need to warp the projection at the beginning of the project? I tried the same and got crazy output when running the fill (I was using SRTM for Idaho-Wyoming)

Brother can you also do a video on potential zones for Rainwater harvesting or ground water potential zones.

Thank you for the lecture. It was very comprehensive and interesting. I would like to ask how one would go about delineating the catchment area if there are multiple outputs (for example into a lake), eg: Lake Malawi

@ugandhara12

Жыл бұрын

Take multiple tile and merge

Thanks for the wonderful video uploaded. Is it possible to derive multiple sub watersheds in qgis? If so please give instructions on the same....

I'm wondering which is the difference between using the reproject feature or simply exporting the layer in a different coordinate system?

@fengfan3996

2 жыл бұрын

when you export the layer in a different coordinate system you can't choose the method. with the warp function, you can choose the resampling methods

Thanks bro

@geodeltalabs

Жыл бұрын

You are welcome :)

The following layers were not correctly generated. • D:/Anak Kampus/Teknik Sipil Undana/fill sinks (wang & liu)/area.sdat You can check the 'Log Messages Panel' in QGIS main window to find more information about the execution of the algorithm. Why ? Help me

@JackyVSO

9 ай бұрын

I'm also having this issue. Did you find a solution?

Thanks

@geodeltalabs

2 жыл бұрын

You are welcome ☺️

Can use it to discover water ground and depth

Dear all, when I use Upslope Area and Run why try a error "SAGA Version: 7.8.2 (64 bit) Error: tool needs graphical user interface [Upslope Area]" and dont create basin? Thanks

Thank you

@geodeltalabs

9 ай бұрын

You're welcome

Thank you so much for all your videos, May I know the algorithm for applying this technique, please?

hi, your explanation was too good, thank you for giving this video. but in current version of qgis there is no option for starhler order option. please tell me how to overcome this issue. thank you.

Can we specify the outlet point from our side if we know its exact coordinates?

Hello When I input data in Upslope area box and run, there is a error showing with missing parameters. So how can I fix this issue. If possible please explain for me. Thanks a lot for your very informative tutorial.

Which version of the software are you using?? Why error in upslope step? Please reply

Hi, thank you again for another great video. I do have a similar problem than with Troy Nguyen but with the next step - the upslope tool. "Error: tool needs graphical user interface [Upslope Area]" (...) The layer were not generated properly. How do we make sure that SAGA 7.8.2 is supported on QGIS please? It looks like that might be the issue. Thank you!

@ahmad-arrafi6711

2 жыл бұрын

I am facing the same problem man

@robertbachmann1573

2 жыл бұрын

Check out: kzread.info/dash/bejne/pmFmp9qoqcuvlqQ.html&ab_channel=HansvanderKwast & gis.stackexchange.com/questions/407307/upslope-area-shows-an-error-stating-tool-needs-graphical-user-interface.

@anggapranata9619

2 жыл бұрын

@@robertbachmann1573 Thanks for the link

thanks alot for this tutorial i hafe a problem in getting the catchment area it can apear with me and give me a massage say the following layers were not generated.

Which version of qgis you are using in this tutorial?

Can I find road networks of area using Qgis?

how do you get the target grid pahang grid? at 2:48 ?

I followed your tutorial but it did't work with deriving coordinate x,y. It keeps resulting in the same number of coordinate and unable to calculate upslope area. Do you have any suggestion?

Nice video, may you please provide the link wer u get those high resolution DEMs and Satellite images

@geodeltalabs

4 жыл бұрын

Hi, the DEM used in this tutorial is just a 30 meter SRTM DEM. You can quite easily download them using USGS EarthExplorer. You might as well use an ASTER DEM for this. Refer to this tutorial where we have shown step-by-step how to download an ASTER DEM kzread.info/dash/bejne/pKOm26ulf6i9nKw.html :)

@hugonicolaubarbosadegusmao7824

4 жыл бұрын

There also a plugin called SRTM Download for QGIS plugins.qgis.org/plugins/SRTM-Downloader/

@snapsmicrosystems7532

4 жыл бұрын

@@geodeltalabs thank you

@snapsmicrosystems7532

4 жыл бұрын

@@hugonicolaubarbosadegusmao7824 much appreciated

Which Qgis version and saga version do you use ?

order 8 stream i.e. main river isn't coming after deriving channels under SAGA tool 'channel network and drainage basin'. What could be the reason. Thanks

Can you please give the link to downland Qgis?

GG, BROOOO, THANKS UUUUUU

May I ask , how do you make the DEM ?

Thank you so much sir for this . My research area is based on swmm. Can you help me out in making the shape file of the study area inorder to upload in SWMM..It would be so grateful.

hi, I find your tutorials very helpful however my upslope saga tool is constantly giving error and isn't working, can you help me out with it.

Sir after running reprojected dem.. Its showing "The following layers were not generated properly".. Not able to generate Filled DEM layer.. Kindly help

Can I ask what machine specification you use with such a speed? In my case, I am using a very strong machine, with 32 GB Ram but still takes time like one to two mins to complete the tasks. Thank you for your work as well.

hi, may i know which website this DEM was downloaded from? I am trying to obtain a high res DEM of Singapore! Thank you!

@geodeltalabs

2 жыл бұрын

You may check this out to learn how to download a SRTM DEM from USGS: kzread.info/dash/bejne/q42Lxtp-qMTIeNI.html

Good day! Is it possible to create different catchment from different outlets and combine all those into one map? Thank you

@geodeltalabs

2 жыл бұрын

Yes, certainly. Once you manage to extract the shapefiles of different catchments, you can use the 'merge vector layers' function to combine them all.

I can't do upslope. it says "The following layers were not correctly generated.". Does anyone have the solution to my problem?

@muhammadfaour3211

2 жыл бұрын

yes same here

Its a nice video, very informative although unfortunately my DEM didn't produce the strahler order.Just watched the rest...Thank you.

@geodeltalabs

2 жыл бұрын

Sorry to hear that. Did you try using a different DEM? you can download for free from USGS. Have a look at the following tutorial- kzread.info/dash/bejne/q42Lxtp-qMTIeNI.html

I have a doubt regarding it... What if we don't want to use the raster calculator..so can we go to the next step skipping that part??