Calculate volumes from a DEM in QGIS

[@suneelkumarahirwar5189]

Finally our request is accepted, I am very happy...This video is very helpful for me...thank u very much sir..Please keep Up...

[@Duenenfelder]

Nowadays, there is also the "Volume Calculation Tool" plugin, which performs this and similar tasks really nicely!

[@HansvanderKwast]

I see it's a plugin. I'll check it out. Thanks.

[@georges2796]

Bedankt hans, ik ben een pix4d maar zeker ook een qgis fan. ik gebruikte meer qgis om multispectrale beelden te bewerken maar dit extra is super!

[@abhimanyukumarbarnwal4616]

Please help in drawing area capacity curve using QGIS for dam reservoir.

[@songhyunchoi2516]

This is very useful. Thank you so much.

[@chinmay3665]

How can we impliment cut and fill analysis and get the highlighted areas that are needed to be cut out and the one needed to be filled?? Thank you.

[@LauraKing-v6p]

Hello, and thank you! This is a great video. I am trying to work out volumes for water behind a dam in a wetland at 5cm elevation increases, and the volumes generated are much higher than expected - and bigger than my back of the envelope checks. The LiDAR data is at 1m resolution. Any thoughts on why this might be? Thank you :)

[@romarssieverything9667]

I was doing this for a reservoir, and I chose the option above base level and got 43 which is i guess in cubic meter. This feels way too low. Do you know why I got that low of a value?

[@mluy1815]

Very nice Hans, thank you very much. I have been looking for a way to do this for quite a while. How would you go about looking for a volume change between two DEM models? So say the mine has operated for a couple of years and you have the survey data for both.

[@HansvanderKwast]

If you want to know the volume difference between 2 DEM's, I would run the tool for both DEM's for the same absolute elevation to calculate the volume below that level and then subtract the values.

[@periruke]

I think the easiest way would be to create difference of DEMs using raster calculator (t2-t1), and then apply raster surface volume to that difference. You can then iterate volume calculation 2 times to get cut and fill volumes (choose above 0 for fill and below for cut). You can inspect volume difference visually using qgis2threejs plugin.

[@faridboussaa3010]

Excellent ! Thank you so much

[@marichrisebrada8130]

Hi! Can we also use this in calculating the volume and area of a lava flow using a DEM?

[@HansvanderKwast]

Yes, you can use it in a similar way if you have a DEM of the lava flow.

[@DeepakSharma-ib4bp]

Very impressive and use full trick but can you upload another video for same process in erdas imagine ?

[@HansvanderKwast]

Sorry. I only do open source software. It can do the job perfectly. I can't afford an expensive Erdas Imagine license like you apparently have.

[@DeepakSharma-ib4bp]

@@HansvanderKwast thanks for your reply and really appreciate your ethics, even i also dont have the personal licence it of my employer 😉 however can you make another video on same subject because in the video process and steps are not clear my bad.

[@HansvanderKwast]

@@DeepakSharma-ib4bp Have you checked Tutorial 7 of the Advanced Tutorials at GIS OpenCourseWare: courses.gisopencourseware.org/course/view.php?id=10 It's only applicable to QGIS with PyQGIS. Code available there too. For other software check with others.

[@DeepakSharma-ib4bp]

@@HansvanderKwast not yet but thanks for sharing the link thank you once again

[@Raghavk9]

How do I do it for a small crater on a volcano? its giving me zero

[@HansvanderKwast]

It should be the same method.

[@Raghavk9]

@@HansvanderKwast 'm getting a zero, Do you think there might be a problem with the base level? Do I have to somehow specify the heights of the edges and the depth of the base of the crater?

[@miraliabbas9267]

My volume and area units are degree square and cube.. how can i change it into meters

[@HansvanderKwast]

You can only do DEM analysis when you reproject to a projected coordinate system in meters prior to the analysis. You can't use a Geographic Coordinate System like EPSG:4326 with lat/lon coordinates in degrees

[@lucabellani3442]

Very Very Great! Grazie!

[@pitruchhaya]

Hi Hans. Is it possible if you could post videos with HD 720p as I was unable to look at it even with 480p on my mobile? Anyways, nice video as always. Thanks

[@HansvanderKwast]

Why would you think I would upload at a low resolution? It's your connection, because I always upload at min. HD720.

[@pitruchhaya]

@@HansvanderKwast Is it?? I only had 3 options till 480p and it was slightly blur. Thanks.

[@sunilkumarpanday969]

In my analysis volume is zero

[@park_cupd4621]

Same here! Did u get the answer how to fix it?

[@sunilkumarpanday969]

@@park_cupd4621 not yet

[@ingthoringason6900]

i was going to like but you have 69 likes and i dont want to ruin that

[@igotyoubeat]

very good video, i am using QGIS to calculate volumes with drones. What an amazing tool. I have a question. my base layer of the stockpile is at 224ft elevation, I clipped a mask around just the pile. Im guessing the base layer should be set to 224 when calculating the "count only above above base level" method

[@HansvanderKwast]

I think that's correct.