as a teacher of permaculture, i don't understand why you think ponds need pumps ? none of the ponds near my house have pumps in them.
Ponds don't need pumps, but I do because I need the water in tanks. Even if it's best to keep water in the soil, I need some backup for irrigation.
More than pumps, ponds need a thriving and lush life around it to keep things (like mosquitoes) in check.
I really have to start thinking about the mosquito problem before this spring, so I can pre-plan that disaster.
William
ps: sorry for hijacking this thread. I can contribute the fact that blueberries like lots of water, while raspberries don't like it so much. If you have a pond+hugelkulture you can plant both (one on top, one near the pond).