QGIS_Clear explanations about steps of a watershed model with DEM(.Tif)

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Qgis is presenting very useful solutions  for watershed modelling via Digital Elevation Model.In this mean,I will carry-out a explanation based on example

Data source link:
https://drive.google.com/drive/folders/1Y_BetElx9kRsQ7mWkjnq1ymObCTeWoX4


Firstly,calling to DEM file with Qgis;




And next,.dragging to qgis data presentation field via cursor .shp file for watershed boundary;



Exporting .shp file for river network via similar procedure;





 Clip Operation:

 Where,I concluded to shape of watershed with clip technic of GDAL;









You can express gradient modelling via considering to various combination via attributes of data clipped.Where,I only presented gradient by standart template;









And,final presentation with waterlines of watershed;





 

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