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551A biological investigation of the affects of discharges from Meldon quarry on the West Okemont River - 8/08/89 and 20/09/89
552An investigation into the elevated BOD levels at Brocken Bridge (R30H001) on the Barnstaple Yeo [DEV/E/20/95]
553An investigation to determine if Great Torrington STW is the cause of elevated copper and zinc concentrations in the River Torridge
554Options for development of an enhanced team culture in the NRA, using the Welsh Regional Technical Department as an example
555A preliminary investigation into the extent of saline ingress into Curry Moor from the River Tone, January 1994
556Modelling the contribution from non-agricultural sources to nitrate pollution in the Sor Brook (Thames Region) (UC 3134)
557A desk top study into the probable causes of poor water quality at Higher Hollacombe Farm (RO5K013) on the Hollacombe Lake
558Procedure for quality assurance for RIVPACS compatible macro-invertebrate samples analysed to the taxonomic level needed for the BMWP-score system
559Assessment of the Trophic Status of Rivers using Macrophytes - supporting documentation for evaluation of the Mean Trophic Rank
560The Economics of No-Spray Zones - a Study of the Risks and Benefits of Pesticide No-Spray Restrictions
561An audit of performance in the AQC inspection of standard biological macro-invertebrate samples in 2002 : The Environment Agency (C00158/31)
562Analysis of benthic macro-invertebrate samples collected by the NRA during 1989 and 1990 from various habitats in the River Delph
563Biological investigation of the impact of Ivybridge sewage treatment works discharge to the River Erme, May 1991
564An investigation to determine the source of high levels of gamma-HCH in the Newlyn River during summer 1989
565An investigation into high concentrations of atrazine in surface waters and the increase in maize production in the Otter valley
566River Habitat Quality the physical character of rivers and streams in the UK and Isle of Man
567Investigation of flow distribution in a fracture zone at the Stripa mine, using the radar method, results and interpretation
568Biosensors for environmental monitoring : a review of capabilities and strategies for the future : consultant's report to the NRA
569An assessment of the causes of non-compliance with river quality standards within the River Tiddy catchment (1989-1991)
570Assessment of the feasibility of using image analysis in the oyster embryo-larval development and daphnia magna growth tests
571An investigation into the frequency of discharge of three combined sewer overflows in the Afan/Kenfig catchment : TM/EAW/96/06
572NRA report of the blue-green algal monitoring 1990 : a report by the toxic blue-green algae task group
573Options for transfer of water from the River Trent and reservoir storage at Great Bradley : technical summary of the feasibility report
574The Natural (Baseline) Quality Of Groundwaters In England And Wales: The Permo-Triassic Sandstones Of Cumbria, North-West England;
575PhD Research. Gary Stephen Rushworth. The role of aquatic macroinvertebrates within reedswamps