The Environment Agency have published the following documents about hydro and are due to publish new guidelines in early 2012:
Good practice guidelines to the environment agency hydropower handbook
Hydropower: A guide for you and your community
The EA's fish pass technical guidelines are also available EA Fish Pass Manual
DEFRA's White Paper 'The Natural Choice: Securing the Value of Nature' places great emphasis on the importance of bio-diversity from all sorts of angles
Sheffield Specific Links
The Sheffield Local Biodiversity Action Partnership's 'Spatial Biodiversity Action Plan' for the River Don and the Sheffield and South Yorkshire Navigation Canals contains information regarding the sensitivity of the Kelham Island site as well as in-depth information about the current state of the River and what will be done to improve it. Essential reading. Further info about Sheffield Wildlife Trust's 'Living Don' project is here.
The Angling Trust
Here's some headlines of late:
Anglers Fume as Regulator Bows to Hydropower
Anglers Fury as Hydro Project Given Go-Ahead
EA Provides Consent to Massacre Eels on River Trent
EA Breaks Promise About River Thames Weirs
EA 'Complacent' about Hydropower Regulation
Government Fails to Ease Passage of Fish
Most Hydropower schemes are a waste of taxpayers' money and damaging to the environment
Tees Barrage Report Confirms Anglers' Fears
The AT's website is easy to search - just pop 'hydro' into the box and see what comes up.
The Salmon And Trout Association's hydro page is here
In the News
Hexham Hydro won £100k in a British Gas competition to build a scheme that will power just 150 homes per year. The Tyne Rivers Trust released this statement in response.
Hexham Hydro scheme 'shelved' due to costs (BBC June 2013 and HH's webpage) .
Brazilian fish ladders come under fire in this informative article from Nature - Fish Ladders of Doom
Short New York Times article with video of the Washington State Governor on the dismantling of the Elwha Valley HEPs
The brilliant Wandle Trust is a charity dedicated to the restoration of the River Wandle. Here's a great example of their weir notching programme.
The importance of woody debris in rivers and streams is explored in this very informative Wildlife Trust publication - Woody Debris Booklet
Chris Firth's '900 Years of The Don Fishery' is available here. This is absolutely essential reading for anyone interested in the history of our rivers and how humans have impacted on them over centuries.
Dr Paul Gaskell of the Wild Trout Trust examines the quality of catches above and below a large impounding weir in this free download of a Trout and Salmon article.