4.7             Catchment Polygon

 

Catchment polygons are the vector representation of the catchment grid. Similar to the catchment grid a catchment polygon bounds the region which has a single drainage outlet.

 

Figure x.x shows the catchment polygon obtained corresponding to the catchment grid obtained in the section 4.6 for the synthetic grid.

 

 

In the Input section of the dialog browse the Catchment Grid generated by the step 4.6. In the Output section of the dialog browse the file name to which the Catchment Polygon could be saved. At this point module is ready to run; select Run to begin processing. Please be patient until it completes processing. The text browser at the bottom of the dialog should provide information related to any error or processing. If the Load in Data Frame is checked the generated Catchment Polygon will be automatically loaded in the Qgis window. After the processing is complete you need to press Close to proceed to next step.