Well, I'm not an expert by no means but I will give you my thoughts, observations, and suggestions so you don't feel like you are being blown off. The guys here on the forum are probably just not real familiar with what you are wanting to accomplish. I have a decent size Koi pond and have tinkered over the years with different pumps and such. What I have found is that you may just need to do a little trial and error. I buy my pumps at my local hardware store. It is a True Value store so it is a bigger chain and has lots of options. I have looked at both Home Depot and Lowes and they have the same items. My biggest pump will pump 800 gallons per hour through a 1 inch pipe up hill 6 feet. This might not sound like much but if you pop that hose off unexpectedely, you will be shocked how much water comes out. Do I think it would supply a 4 foot wide simulated creek? Probably not. Now what I would do though is get the next couple of sizes up. I think I saw a 1600 gallon per hour pump last time I was there. I believe that would probably supply a good flow down a small simulated creek. The good thing about these small pumps to is that they just lay in the water. They have a screen to keep junk out of them and once in a while it will get plugged and you just clean it off. My pump cost 89 dollars and I think the bigger one was around 150. Not to bad if you ask me. Then if that does not supply the amount of water that you need, I would just put another one in. They are very efficient, simple to hook up, and last a long time. My one pump has been running for 4 years and just pooped out on me. The hardware store also sells the flexible line that you would need and the pump comes with the fittings.
