Stream and catchment delineation with GIS (theory) скачать в хорошем качестве

Stream and catchment delineation with GIS (theory)

This video show how to derive streams and catchments from a DEM using geographic information systems (GIS). The whole workflow will be presented, which includes, DEM aquisition, mosaic, reprojection, void filling, filling of sinks, Strahler order, D8 flow direction and much more. This video is part of IHE Delft OpenCourseWare. More free resources can be found at http://www.gisopencourseware.org For an overview of our GIS courses and info on tailor made trainings and advise see our folder: https://www.un-ihe.org/sites/default/... More information about the book "QGIS for Hydrological Applications - Recipes for Catchment Hydrology and Water Management" by Kurt Menke and Hans van der Kwast can be found at the website of Locate Press: http://www.locatepress.com/hyd IHE Delft and Nieuwland Geoinformatie offer an online course. It includes support from experienced trainers and you'll get the official QGIS certificate after completion. More info at: http://www.learning-gis.com Subscribe to the YouTube Channel for updates! 0:00 Introduction 0:18 Learning objectives 2:10 Catchments 5:42 Reproject DEM 8:33 Subset DEM 10:09 Fill sinks 11:43 Burn-in the stream network 12:40 Calculate flow directions: D8 15:57 Derive streams: Flow accumulation 16:56 Strahler order 18:28 Define outflow point 19:05 Derive catchment 19:29 Stream and catchment delineation 20:15 Boundary condititions