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QGIS: Reservoir volume from DEM - Kajaki Reservoir, Afghanistan

How can I find the volume of a reservoir or lake from a DEM? In this video we will calculate the elevation-area-storage capacity for the Kajaki reservoir, Afghanistan from the SRTM30 DEM. We will use data from a 2006 bathymetric survey, which used an arbitrary datum, to find the elevation-volume relationship below the SRTM30 water mask, and then combine the two data sets together in Excel. I will take you step-by-step through all the processing from the DEM to the final elevation area-storage capacity curves. Chapters: 00:00 Introduction 02:13 Step 1: DEM to Equal Area Projection 03:45 Step 2: Create contour lines 04:19 Step 3: Select maximum flooded area 07:13 Step 4: Edit maximum contour line 15:11 Step 5: Contour line to polygon 16:00 Step 6: Extract reservoir DEM 17:11 Step 7: Calculate Elevation-Area-Volume 21:13 How to get the DEM below the SRTM water mask 22:14 Step 8: Excel processing 25:20 Final remarks Disclaimer: This video is based on open source data & the purpose is to train you in QGIS & Excel. I am not responsible for what you do with this information/methodology. You need to check you own data, work and conclusions. ******************************************************************* Link to Kajaki reservoir data on Google Drive used for this video: QGIS shape files & Reservoir DEM: https://bit.ly/3Lc70Ws EXCEL data & calculations: https://bit.ly/3unSTaz ******************************************************************* Some useful links: Link to the 2007 USGS report on the Kajaki reservoir: https://pubs.usgs.gov/sir/2007/5148/p... Link to video on Reservoir Elevation-Area-Storage Capacity Curves in Excel:    • Excel: How to add a 2nd Axis to a Cha...   For more QGIS videos see the QGIS playlist:    • QGIS 101   Images used under Creative Commons License Bathymetric survey Australian Government Australian Transport Safety Bureau, CC BY 4.0 https://creativecommons.org/licenses/..., via Wikimedia Commons Source: https://upload.wikimedia.org/wikipedi... #QGIS #VolumefromDEM #Reservoirs