Maybe you will want to try Nature Climate Change. However, I guess the best way is to search and read as many references as possible using keywords like climate change or catchment assessment in google scholar. In this way, you may get your own perspectives.

Hi.

You could use the journal or author name estimator (JANE) or journal suggester to get the most appropriate journal for your article.

A good option for you is:

https://www.journals.elsevier.com/atmospheric-environment