here's some books to get you started. Do a search for a lot more info.

<a href="https://microhydropower.net/literature/#7" target="_blank" rel="nofollow noopener noreferrer">Literature @ microhydropower.net</a>, Micro-Hydropower Systems - A Buyer's Guide <a href="https://microhydropower.net/literature/#13" target="_blank" rel="nofollow noopener noreferrer">Literature @ microhydropower.net</a>, Manual on Pumps Used as Turbines, part of Harnessing Water Power on a Small Scale, volume 11 <a href="https://microhydropower.net/literature/#10" target="_blank" rel="nofollow noopener noreferrer">Literature @ microhydropower.net</a>, Going with the flow: Small Scale Water Power Made Simple <a href="https://microhydropower.net/literature/#23" target="_blank" rel="nofollow noopener noreferrer">Literature @ microhydropower.net</a>, Micro-hydro: Clean Power from Water <a href="https://microhydropower.net/literature/#4" target="_blank" rel="nofollow noopener noreferrer">Literature @ microhydropower.net</a>, Micro-hydro power, A guide for development workers <a href="https://microhydropower.net/literature/#8" target="_blank" rel="nofollow noopener noreferrer">Literature @ microhydropower.net</a>, Low cost development of small water power sites <a href="https://microhydropower.net/literature/#3" target="_blank" rel="nofollow noopener noreferrer">Literature @ microhydropower.net</a>, Micro-hydro design manual, A guide to small-scale water power schemes <a href="https://microhydropower.net/literature/#9" target="_blank" rel="nofollow noopener noreferrer">Literature @ microhydropower.net</a>, Micro Hydro Electric Power <a href="https://microhydropower.net/literature/#5" target="_blank" rel="nofollow noopener noreferrer">Literature @ microhydropower.net</a>, Micro-Hydropower Sourcebook : A Practical Guide to Design and Implementation in Developing Countries <a href="https://microhydropower.net/literature/#6" target="_blank" rel="nofollow noopener noreferrer">Literature @ microhydropower.net</a>, Best practices for sustainable development of micro hydro power in developing countries <a href="https://microhydropower.net/literature/#11" target="_blank" rel="nofollow noopener noreferrer">Literature @ microhydropower.net</a>, Local experience with micro-hydro technology <a href="https://microhydropower.net/literature/#12" target="_blank" rel="nofollow noopener noreferrer">Literature @ microhydropower.net</a>, Hydraulics Engineering Manual, part of Harnessing Water Power on a Small Scale, volume 2 <a href="https://microhydropower.net/literature/#20" target="_blank" rel="nofollow noopener noreferrer">Literature @ microhydropower.net</a>, New Himalayan Water Wheels <a href="https://microhydropower.net/literature/#17" target="_blank" rel="nofollow noopener noreferrer">Literature @ microhydropower.net</a>, Multi-Purpose Power-Unit, with horizontal water turbine, Basic information <a href="https://microhydropower.net/literature/#18" target="_blank" rel="nofollow noopener noreferrer">Literature @ microhydropower.net</a>, A Design Manual for Water Wheels <a href="https://microhydropower.net/literature/#2" target="_blank" rel="nofollow noopener noreferrer">Literature @ microhydropower.net</a>, Layman's guide on how to develop a small hydro site <a href="https://microhydropower.net/literature/#15" target="_blank" rel="nofollow noopener noreferrer">Literature @ microhydropower.net</a>, Motors as Generators for Micro-Hydro Power <a href="https://microhydropower.net/literature/#22" target="_blank" rel="nofollow noopener noreferrer">Literature @ microhydropower.net</a>, Hydraulic rams - a comparative investigation <a href="https://microhydropower.net/literature/#16" target="_blank" rel="nofollow noopener noreferrer">Literature @ microhydropower.net</a>, The Micro-hydro Pelton Turbine Manual, Design Manufacture and Installation for Small-scale Hydropower <a href="https://microhydropower.net/literature/#21" target="_blank" rel="nofollow noopener noreferrer">Literature @ microhydropower.net</a>, A Manual on the Hydraulic Ram for Pumping Water <a href="https://microhydropower.net/literature/#14" target="_blank" rel="nofollow noopener noreferrer">Literature @ microhydropower.net</a>, Pumps as Turbines: A user's guide