Start a couple of blank documents and copy/paste all the links and stories you find that sound like they might apply to your particular site. Meybe one doc for stories on batteries, chargers, and inverters, etc.
Another doc with applicable info on hydro wheel/turbine stories that match your water performance profile.
Click on the "Hydro" section, and read every story from now, going back the last two years.
How much elevation difference is there from the highest part of your water (on your property) to the lowest part of the stream? this is the water drop, called "head" height.
How long is the water run you have authority over?
How fast is the flow (measure 100 feet and count how many seconds it takes a ball to float down that length), and how much volume of flow do you have? (measure average width and depth times speed, convert to gallons per minute).
Do you want to charge a battery pack that will power a 120 VAC television and lights through an inverter? How many kilowatts does your current electric bill say you use monthly now? Describe the loads you wish to power so component size can be calculated.
Are you allowed to raise a 60-foot tower to add a wind-gen later?
Have your wife put a moist cloth on your forehead, now that your brain is overheating from all the questions....
Also, what region of what country/state are you in? (steam begins rising from clyde01's head)