Calculate time of concentration of a river in QGIS (Kirpich)

Описание к видео Calculate time of concentration of a river in QGIS (Kirpich)

This video demonstrates how to calculate the time of concentration for a river using the Kirpich method. The basic equation for SI units is used.
These are the steps:
1. Select longest path of a river
2. Dissolve the line segments
3. Find first and last node on river
4. Merge first and last node into one point vector layer
5. Sample elevation from DEM at these points
6. Calculate Kirpich equation by hand or using the PyQGIS script

PyQGIS script: https://github.com/jvdkwast/PyQGIS_Hy...

This video is part of IHE Delft OpenCourseWare. More free materials at http://www.gisopencourseware.org

#QGISHydro #IHEDelft #OpenCourseWare

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