Hi, we are doing climate change studies in a couple of basins with use of WEAP. We use the gridded input (Princeton data) that comes with a new WEAP setup and would like to change this gripped input, based on "delta change values" we can find for each country via e.g. the World Bank Climate change portal.

Data from the WB portal comes as a "percentage change" (for precipitation) and degree change (for temperatures) for every month of the selected time period.

Do you have any tips on how we can impose the 'delta change values' on all of the historical gridded data in the most easy/efficient way in WEAP?

Thank you!
Tor Haakon Bakken

If you would like to implement an increase or decrease in input climate data to deviate from your time-series inputs:

I would make a key expression containing the magnitude of your deviation, and then modify your climate input expressions. For example, your temperature input may be = Key\Temperature increase value + ReadFromFile(temperature file.....)

Apologies for not answering this question originally.