Hi, I am a graduate student and my study is hydrological simulation. I wanted to knowT can I use satellite images( like TRMM,..) to measure the rainfall of each catchment without using catchment delineation mode?

Dear Arefeh,
This sounds like something that could be done in GIS. If you are able perform this analysis, you could certainly use the data in WEAP to manually build your model (without using catchment delineation mode). However, WEAP does not have the capability to read and analyze satellite images.

Hope that helps,
Anne