Farmer Gary, you forgot to mention that you have a flowing creek. So, not actually flat ! With flowing water you can make a ram pump to pump water up to a tank and then use gravity. The ram pump uses no electricity and works 24/7 as long as the water flows. Utube has a number of videos. No sun, no wind, just flowing water. The volume may be low but over a period of time it amounts to a lot of water! And only two moving parts !!