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501The development of biomanipulation techniques and control of phosphorus release from sediments (475/1/A) : LIFE project : restoration of the Norfolk Broads
502The application of toxicity-based criteria for the regulatory control of wastewater dicharges Response compendium March 1997
503Rising groundwater levels in the chalk-basal sands aquifer of the Central London Basin. Progress report, March 1996
504Preliminary modelling of water storage and transfers in the Anglian region : supporting documentation for the regional water resources strategy May 1993
505Continuous water quality monitoring results collected from the river Torridge at Cockshilhay and Beam Bridge for the EU UWWTD
506Water quality objectives: procedures used by the NRA for the purpose of surface waters river ecosystem) (classification) regulations 1994
507Second interim report on the environmental impacts of the drought on Yorkshire's rivers April 1995 to April 1996
508Interim report on the environmental impacts of the drought on Yorkshire rivers April 1995 to April 1996
509A report on the 1992 strategic stock assessment survey of the upper Eden catchment with particular reference to salmonids
510River Darent low flow alleviation. Annex 3 : plan for the Darent : report of the joint NRA/TWUL project team
511Conservation and recreation : the Wye challenge : towards a management strategy for the River Wye : summary report (bilingual)
512An Assessment of Cormorant Depredation on Stillwater Coarse Fish Populations in the Lea and Colne Valleys of the Thames Catchment
513Water framework directive : guiding principles on the technical requirements (summary) : accompanying summary to the Environment Agency consultation document
514A biological investigation of the affects of discharges from Meldon quarry on the West Okemont River - 8/08/89 and 20/09/89
515An investigation into the bacterial water quality of the River Umber, N. Devon : December 1996 : DEV/WQ/14/96
516An investigation into the elevated BOD levels at Brocken Bridge (R30H001) on the Barnstaple Yeo [DEV/E/20/95]
517An investigation to determine if Great Torrington STW is the cause of elevated copper and zinc concentrations in the River Torridge
518Options for development of an enhanced team culture in the NRA, using the Welsh Regional Technical Department as an example
519A preliminary investigation into the extent of saline ingress into Curry Moor from the River Tone, January 1994
520Bioccumulation of halogenated compounds by limpets and fucoid seaweeds in the vicinity by the Black Rock sewage outfall, Weston-Super-Mare
521Modelling the contribution from non-agricultural sources to nitrate pollution in the Sor Brook (Thames Region) (UC 3134)
522A desk top study into the probable causes of poor water quality at Higher Hollacombe Farm (RO5K013) on the Hollacombe Lake
523Health effects of sea bathing (WMI 9021) - Phase III final report to the Department of the Environment
524Procedure for quality assurance for RIVPACS compatible macro-invertebrate samples analysed to the taxonomic level needed for the BMWP-score system
525Assessment of the Trophic Status of Rivers using Macrophytes - supporting documentation for evaluation of the Mean Trophic Rank