QGIS 101: Map the Catchment - Mapping catchments & streams from DEM - Part 2 of 3

Video 2 of 3, Mapping catchments and streams from DEM. In this video we will delineate the catchment/watershed of the Salma dam in Afghanistan using the filled DEM we prepared in the first video. If we want to understand the water balance of a catchment or drainage basin, we need to start by delineating the catchment/watershed. In this three-part sequence we will prepare the DEM (Video 1), map the catchment/watershed (Video 2) and extract the streams (Video 3). 00:00 Introduction 00:33 Step 4: Flow Direction & Flow Accumulation Grid 00:54 GRASS - Raster - r.watershed 03:10 Flow Accumulation Grid symbology 04:27 Step 5: Delineate the catchment 04:53 GRASS - Raster - r.water.outlet 06:12 Step 6: Convert catchment raster to vector 06:20 GRASS - Raster - r.to vect 07:21 Catchment polygon symbology 07:40 The results 08:30 Final words Link to Video 1:    • QGIS 101: Prepare the DEM - Mapping catchm...   Link to Video 2:    • QGIS 101: Map the Catchment - Mapping catc...   (THIS VIDEO) Link to Video 3:    • QGIS 101: Extract the Streams - Mapping ca...   This video is part of the online QGIS 101 training course. For more QGIS videos see the QGIS playlist:    • QGIS 101   #QGIS #Catchment #Watershed