Web-site for the British Hydropower Association:

http://www.british-hydro.org/

Web-site for the European Small Hydropower Association, including download of their Layman’s Guide to small hydro:

http://www.esha.be/

Internet portal for micro-hydro power, with a focus on developing countries:

http://microhydropower.net

The National River Flow Archive, containing river flow data from the UK network of over 1300 gauging stations:

www.nwl.ac.uk/ih/nrfa/

An international hydropower industry guide as compiled by The International Journal of Hydropower and Dams – mainly oriented towards larger companies and projects.

http://www.hydropower-dams.com/atlas/industry.html

The James & James database of Renewable Energy Suppliers and Services, holding the details of nearly 12,000 renewable energy companies and organizations from around the world.
http://www.jxj.com/suppands/renenerg/index.html