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426Report on Grayling research and production in the Anglian region of the National Rivers Authority, December 1988 to April 1989
427The development of biomanipulation techniques and control of phosphorus release from sediments (475/1/A) : LIFE project : restoration of the Norfolk Broads
428The application of toxicity-based criteria for the regulatory control of wastewater dicharges Response compendium March 1997
429Rising groundwater levels in the chalk-basal sands aquifer of the Central London Basin. Progress report, March 1996
430Preliminary modelling of water storage and transfers in the Anglian region : supporting documentation for the regional water resources strategy May 1993
431Continuous water quality monitoring results collected from the river Torridge at Cockshilhay and Beam Bridge for the EU UWWTD
432Water quality objectives: procedures used by the NRA for the purpose of surface waters river ecosystem) (classification) regulations 1994
433Mercury, methylmercury and copper in the River Yare, Norfolk : summary of a report to the National Rivers Authority, Anglian Region
434Interim report on the environmental impacts of the drought on Yorkshire rivers April 1995 to April 1996
435River Darent low flow alleviation. Annex 3 : plan for the Darent : report of the joint NRA/TWUL project team
436Conservation and recreation : the Wye challenge : towards a management strategy for the River Wye : summary report (bilingual)
437An assessment of the impact of Berkhamsted and Maple Lodge STWs on the Grand Union canal based on macroinvertebrate surveys
438An Assessment of Cormorant Depredation on Stillwater Coarse Fish Populations in the Lea and Colne Valleys of the Thames Catchment
439Water framework directive : guiding principles on the technical requirements (summary) : accompanying summary to the Environment Agency consultation document
440A biological investigation of the affects of discharges from Meldon quarry on the West Okemont River - 8/08/89 and 20/09/89
441An investigation into the bacterial water quality of the River Umber, N. Devon : December 1996 : DEV/WQ/14/96
442An investigation into the elevated BOD levels at Brocken Bridge (R30H001) on the Barnstaple Yeo [DEV/E/20/95]
443An investigation to determine if Great Torrington STW is the cause of elevated copper and zinc concentrations in the River Torridge
444Options for development of an enhanced team culture in the NRA, using the Welsh Regional Technical Department as an example
445Bioccumulation of halogenated compounds by limpets and fucoid seaweeds in the vicinity by the Black Rock sewage outfall, Weston-Super-Mare
446Modelling the contribution from non-agricultural sources to nitrate pollution in the Sor Brook (Thames Region) (UC 3134)
447A desk top study into the probable causes of poor water quality at Higher Hollacombe Farm (RO5K013) on the Hollacombe Lake
448Health effects of sea bathing (WMI 9021) - Phase III final report to the Department of the Environment
449Procedure for quality assurance for RIVPACS compatible macro-invertebrate samples analysed to the taxonomic level needed for the BMWP-score system
450Assessment of the Trophic Status of Rivers using Macrophytes - supporting documentation for evaluation of the Mean Trophic Rank