I still say you need to talk to a well driller that can supply you with a pump and expertise. One reason is a local driller should be able to tell you what the water potential in your area is. That well may be recorded on a state well log too. No use drying the local wells just to top your pond if your water potential is not that great.

I'm not an expert but a 2 inch diameter pipe is not very wide for a submersible pump. However they may exist.

You may be limited by how much you can pump by 2 diameter casing too. But for topping your pond it may be O.K.

Before I had my well, I bypassed my geothermal heating and cooling discharge (uses groundwater to heat and cool) and was pumping 20 gpms which filled the .62 pond and could more than keep up with evaporation.

I think splashing the water in on rocks would probably be just fine for a 1 acre pond.

If pigs could fly bacon would be harder to come by and there would be a lot of damaged trees.