526 | Analysis of growth and survival of sea trout from the Welsh Dee: Interim Report, 2nd April 2000 |
527 | An audit of performance in the analysis of biological samples in 2000. Environment Agency : primary audit : C00158/10 |
528 | Low flows and water resources : facts on the top 40 low flow rivers in England and Wales |
529 | Chemical river quality 1993-1995 according to the general quality assessment (GQA) scheme [map] : scale 1 : 750 000 |
530 | Foot and Mouth Disease Epidemic. Disposal of culled stock by burial : guidance and reference data for the protection of controlled waters |
531 | Water resources for the future : a strategy for Wales (Bilingual) : Adnoddau dwr ar gyfer y dyfodol (Bilingual) |
532 | NRA guidance on the acceptable leachable values for contaminated material to be deposited in Upper Tame catchment |
533 | River Glen : river channel assessment : annex C : an assessment of low flow characteristics of the River Glen, Lincolnshire |
534 | The development of macroinvertebrate keys using TWINSPAN classification : a manual for NRA biologists (001/10/W) : draft final report |
535 | NRA response to using water wisely : a consultation paper published by the DoE/Welsh Office July 1992 |
536 | Environmental Impacts of Alkylphenol Ethoxylates and Carboxylates. Part 1 Proposals for the Development of Environmental Quality Standards |
537 | Investigating the effect of changing retention time in natural and artificial water bodies: Simulations using PROTECH-D |
538 | Torridge data report : biological monitoring of organic inputs to the study catchments using rapid biological assessment keys |
539 | An investigation into the presence of high levels of cadmium in sea-water samples from Mounts Bay, Cornwall |
540 | Water quality modelling in the Environment Agency (Report no.28) : present practice and future challenges : Water Quality Modelling Group workshop proceedings |
541 | The Blythe/Cole/Bourne catchment management plan : first annual review : July 1994 to July 1995 (NRA Severn-Trent 48)
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542 | Environmental assessment of Denver MRF : impact of freshwater flow on water quality of the Great Ouse estuary : draft working paper 3 |
543 | Local Environment Agency plan for the West Midlands Tame, 2nd annual review, July 2001 : local environment focus |
544 | Water wise : are you pouring money down the drain? (Bilingual) : Doeth a dwr : ydych chi'n tywallt arian i lawr y draen? |
545 | The use of constructed wetlands to ameliorate metal-rich mine waters. Stage 1 : review of existing literature |
546 | Further monitoring of the impact of Crown Dale waste water treatment works final effluent on water quality |
547 | An investigation into possible causes of poor water quality at Nymphayes Bridge (R30D009) on the Gissage Lake |
548 | The FBA-Welsh Water simulation model of phytoplankton dynamics in flushed systems. Authentication in a coastal lagoon |
549 | The protection of East Anglian wetlands Phase 2 : review of BGS draft report. February 1995 (OI 558) |
550 | The use of constructed wetlands to ameliorate metal-rich mine waters. Stage 1 : study of natural wetlands |