how can I project future climatic parameters such as evapotranspiration, Precipitation from the hydrological model created

William,

Future climate data is available via the catchment delineation tool, accessed via Schematic --> Catchment Delineation Mode. In the menu on the right side, if you click on Select below Load Climate Data, you can select the data source, which includes global CMIP6 projections through the year 2100. The parameters include temperature, precipitation, wind, and humidity.

Hope this helps!
-Doug

I Have downloaded it but how do u go about it from here...

The climate expressions will then appear under the Data Tree for your catchment objects.

If you wish to use the climate data files for a different model, or to load multiple future projection scenarios across multiple scenarios, you can follow the instructions posted here: https://www.weap21.org/index.asp?action=9&read=4546&fID=30.

Hope this helps!
-Doug