How to deal with water seeps?

I'm playing the crater map and I'd like to find a better way to use the water seeps for filling up a dam. Any suggestions for this map?

https://preview.redd.it/n0a5jpc4wd0h1.png?width=2940&format=png&auto=webp&s=821dcad49c0c8018ce0796391926720d9e299984