The Old Farmer I worked for as a Kid used to say " The Water is the Water, you can't create it, you can't distroy it. Its the same water that the Dinosaures drank, It will do what ever it wants to do, and it will head to the Sea no matter what you want it to do. Oh you can divert it, you can impound it, for awhile, you can pollute it, you can change its course a bit, but the water is the water, and it will do what it wants to do. " Our efforts to use it for our benefit while it is here, befor it heads to the Sea , is all we can talk about. Water does run down hill, and we can divert it a bit on its way. That slight change of course can really help our plants and improve our gardens, orchards, cane fruits etc. The more I study water flows the more I feel that it is not Rocket Science. It runs down hill. As little as 1 inch fall in 10 feet is enough to make water flow. Making it soak into our propertys by holding it level in swales can make a great long term inprovement to our lands. I love playing in the water, playing in the creek, I have since I was a kid.
Never doubt that a small group of dedicated people can change the world, indeed it is the only thing that ever has.