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501Water framework directive : guiding principles on the technical requirements (summary) : accompanying summary to the Environment Agency consultation document
502An investigation into the bacterial water quality of the River Umber, N. Devon : December 1996 : DEV/WQ/14/96
503An investigation into the elevated BOD levels at Brocken Bridge (R30H001) on the Barnstaple Yeo [DEV/E/20/95]
504An investigation to determine if Great Torrington STW is the cause of elevated copper and zinc concentrations in the River Torridge
505Options for development of an enhanced team culture in the NRA, using the Welsh Regional Technical Department as an example
506A preliminary investigation into the extent of saline ingress into Curry Moor from the River Tone, January 1994
507A report on the infaunal communities within Weston Bay in relation to the sewage outfall at Black Rock
508Bioccumulation of halogenated compounds by limpets and fucoid seaweeds in the vicinity by the Black Rock sewage outfall, Weston-Super-Mare
509A desk top study into the probable causes of poor water quality at Higher Hollacombe Farm (RO5K013) on the Hollacombe Lake
510Health effects of sea bathing (WMI 9021) - Phase III final report to the Department of the Environment
511Procedure for quality assurance for RIVPACS compatible macro-invertebrate samples analysed to the taxonomic level needed for the BMWP-score system
512Assessment of the Trophic Status of Rivers using Macrophytes - supporting documentation for evaluation of the Mean Trophic Rank
513An audit of performance in the AQC inspection of standard biological macro-invertebrate samples in 2002 : The Environment Agency (C00158/31)
514Analysis of benthic macro-invertebrate samples collected by the NRA during 1989 and 1990 from various habitats in the River Delph
515River Habitat Quality the physical character of rivers and streams in the UK and Isle of Man
516Investigation of flow distribution in a fracture zone at the Stripa mine, using the radar method, results and interpretation
517Biosensors for environmental monitoring : a review of capabilities and strategies for the future : consultant's report to the NRA
518An assessment of the causes of non-compliance with river quality standards within the River Tiddy catchment (1989-1991)
519Assessment of the feasibility of using image analysis in the oyster embryo-larval development and daphnia magna growth tests
520An investigation into the frequency of discharge of three combined sewer overflows in the Afan/Kenfig catchment : TM/EAW/96/06
521NRA report of the blue-green algal monitoring 1990 : a report by the toxic blue-green algae task group
522Options for transfer of water from the River Trent and reservoir storage at Great Bradley : technical summary of the feasibility report
523Land use assessment of non-tidal main rivers in the southern region of the National Rivers Authority : report EX 2922
524The Natural (Baseline) Quality Of Groundwaters In England And Wales: The Permo-Triassic Sandstones Of Cumbria, North-West England;
525PhD Research. Gary Stephen Rushworth. The role of aquatic macroinvertebrates within reedswamps