Sackperson the advice on piping the water to your pond is the best solution.
My pond wouldn't exist if I didn't pipe in the water from a stream. I'm lucky enough to have about 8 ft. of head from the pipe inlet to the pond surface and both 2" pipes run 300ft. to the pond supplying 110 GPM total.
I'm using 2" gray plastic conduit with bell ends so each pipe fits into the other, the cost is reasonable at that size and easy to work with, and as Ken said you can put gate valves on the pipe to control the water input.
