501 | Rising groundwater levels in the chalk-basal sands aquifer of the Central London Basin. Progress report, March 1995 |
502 | Tributyltin in the aquatic environment : final report to the National Rivers Authority September 1990 to September 1992 |
503 | A report on the strategic stock assessment survey of the River Esk catchment 1994 with particular reference to salmonids |
504 | An investigation of ecological change in the rivers Kennet and Lambourn. Progress report for the period April 1999-March 2000 |
505 | Guidance notes for local planning authorities on the methods of protecting the water environment through development plans |
506 | Report on Grayling research and production in the Anglian region of the National Rivers Authority, December 1988 to April 1989 |
507 | The development of biomanipulation techniques and control of phosphorus release from sediments (475/1/A) : LIFE project : restoration of the Norfolk Broads |
508 | Preliminary modelling of water storage and transfers in the Anglian region : supporting documentation for the regional water resources strategy May 1993 |
509 | Water quality objectives: procedures used by the NRA for the purpose of surface waters river ecosystem) (classification) regulations 1994 |
510 | Mercury, methylmercury and copper in the River Yare, Norfolk : summary of a report to the National Rivers Authority, Anglian Region |
511 | A report on the 1992 strategic stock assessment survey of the upper Eden catchment with particular reference to salmonids |
512 | River Darent low flow alleviation. Annex 3 : plan for the Darent : report of the joint NRA/TWUL project team |
513 | Conservation and recreation : the Wye challenge : towards a management strategy for the River Wye : summary report (bilingual) |
514 | Implementation of environmental accounting : the way ahead for a new "green agency" : submitted for the Open University Open Business School MBA |
515 | Regulation guidance and direction making powers in the Environment Act 1995 in relation to the Environment Agency |
516 | Opportunities for change : the Environment Agency's response to the government consultation paper on a revised UK strategy for sustainable development |
517 | An assessment of the impact of Berkhamsted and Maple Lodge STWs on the Grand Union canal based on macroinvertebrate surveys |
518 | An Assessment of Cormorant Depredation on Stillwater Coarse Fish Populations in the Lea and Colne Valleys of the Thames Catchment |
519 | Water framework directive : guiding principles on the technical requirements (summary) : accompanying summary to the Environment Agency consultation document |
520 | A biological investigation of the affects of discharges from Meldon quarry on the West Okemont River - 8/08/89 and 20/09/89 |
521 | An investigation into the elevated BOD levels at Brocken Bridge (R30H001) on the Barnstaple Yeo [DEV/E/20/95] |
522 | Options for development of an enhanced team culture in the NRA, using the Welsh Regional Technical Department as an example |
523 | A preliminary investigation into the extent of saline ingress into Curry Moor from the River Tone, January 1994 |
524 | A report on the infaunal communities within Weston Bay in relation to the sewage outfall at Black Rock |
525 | Bioccumulation of halogenated compounds by limpets and fucoid seaweeds in the vicinity by the Black Rock sewage outfall, Weston-Super-Mare |