Delimitation of watersheds & extraction of streams from a DEM

In this tutorial, we will learn how to delineate watersheds and extract stream networks from a Digital Elevation Model (DEM) using GIS and hydrological analysis techniques. Watershed delineation and stream extraction are essential components of hydrological modelling, drainage basin analysis, geomorphological studies, and flood susceptibility assessment. This step-by-step tutorial demonstrates how to process a DEM to identify drainage patterns, define watershed boundaries, and extract stream networks based on flow direction, flow accumulation, and a suitable stream initiation threshold. Topics covered in this video: Introduction to DEM and its applications in hydrological analysis. DEM preprocessing and sink filling. Generation of the flow direction raster. Calculation of flow accumulation. Selection of an appropriate flow accumulation threshold for stream extraction. Extraction of stream networks from a DEM. Delineation of watershed and sub-watershed boundaries. Identification of drainage patterns and stream networks. Applications in watershed management, flood hazard assessment, and geomorphological studies. Way of knowing the UTM Zone number of your study area in ArcGIS:    • Way of knowing the UTM Zone number of your...   #GIS #WatershedDelineation #DEM #StreamExtraction #HydrologicalAnalysis #QGIS #ArcGIS #RemoteSensing #FlowAccumulation #FlowDirection #WatershedManagement #DrainageNetwork #Geomorphology #FloodSusceptibility #Map2Decision