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451The application of toxicity-based criteria for the regulatory control of wastewater dicharges Response compendium March 1997
452Rising groundwater levels in the chalk-basal sands aquifer of the Central London Basin. Progress report, March 1996
453Preliminary modelling of water storage and transfers in the Anglian region : supporting documentation for the regional water resources strategy May 1993
454Mercury, methylmercury and copper in the River Yare, Norfolk : summary of a report to the National Rivers Authority, Anglian Region
455Second interim report on the environmental impacts of the drought on Yorkshire's rivers April 1995 to April 1996
456A report on the 1992 strategic stock assessment survey of the upper Eden catchment with particular reference to salmonids
457River Darent low flow alleviation. Annex 3 : plan for the Darent : report of the joint NRA/TWUL project team
458Conservation and recreation : the Wye challenge : towards a management strategy for the River Wye : summary report (bilingual)
459Implementation of environmental accounting : the way ahead for a new "green agency" : submitted for the Open University Open Business School MBA
460Regulation guidance and direction making powers in the Environment Act 1995 in relation to the Environment Agency
461Opportunities for change : the Environment Agency's response to the government consultation paper on a revised UK strategy for sustainable development
462An Assessment of Cormorant Depredation on Stillwater Coarse Fish Populations in the Lea and Colne Valleys of the Thames Catchment
463Water framework directive : guiding principles on the technical requirements (summary) : accompanying summary to the Environment Agency consultation document
464A biological investigation of the affects of discharges from Meldon quarry on the West Okemont River - 8/08/89 and 20/09/89
465An investigation to determine if Great Torrington STW is the cause of elevated copper and zinc concentrations in the River Torridge
466Options for development of an enhanced team culture in the NRA, using the Welsh Regional Technical Department as an example
467A preliminary investigation into the extent of saline ingress into Curry Moor from the River Tone, January 1994
468Bioccumulation of halogenated compounds by limpets and fucoid seaweeds in the vicinity by the Black Rock sewage outfall, Weston-Super-Mare
469Modelling the contribution from non-agricultural sources to nitrate pollution in the Sor Brook (Thames Region) (UC 3134)
470Assessment of the Trophic Status of Rivers using Macrophytes - supporting documentation for evaluation of the Mean Trophic Rank
471The Economics of No-Spray Zones - a Study of the Risks and Benefits of Pesticide No-Spray Restrictions
472Analysis of benthic macro-invertebrate samples collected by the NRA during 1989 and 1990 from various habitats in the River Delph
473Biological investigation of the impact of Ivybridge sewage treatment works discharge to the River Erme, May 1991
474An investigation to determine the source of high levels of gamma-HCH in the Newlyn River during summer 1989
475An investigation into high concentrations of atrazine in surface waters and the increase in maize production in the Otter valley