526 | A study to investigate and propose remedies for river quality problems in the Madford catchment |
527 | Broadland flood alleviation strategy : the programme for flood defence works |
528 | Severn Trent region : River Sence, Hilton Brook : Annex of R and D Note 456 |
529 | Water quality 2000 : a strategy for the water quality function |
530 | R and D project management manual : user manual |
531 | Pollution and how to spot it (NRA Severn-Trent 61) |
532 | River corridor strategic overview feasibility study : a report to the National Rivers Authority |
533 | An assessment of River Fowey salmonid populations |
534 | An investigation of ecological change in the rivers Kennet and Lambourn. Progress report for the period April 1999-March 2000 |
535 | Water quality report 1990 |
536 | The Role of Bankside Habitat in River Ecology: The importance of riparian and marginal vegetation on the distribution and abundance of aquatice invertebrates |
537 | Identified uses of tidal waters : volume 1 |
538 | River Tavy catchment river water quality classification 1991 |
539 | St Columb Major STW UV disinfection survey 1994 : final draft report |
540 | Regional river quality monitoring and surveillance : results of the 1990/1991 biological survey : draft report |
541 | The role of the National Rivers Authority in droughts |
542 | River Glen : river channel assessment : annex C : an assessment of low flow characteristics of the River Glen, Lincolnshire |
543 | River quality : 1993 |
544 | Fishery survey of the River Axe catchment |
545 | Synoptic State of the Environment Monitoring |
546 | Monitoring of rivers and effluents |
547 | Impact assessment of Meldon quarry on water quality in the West Okement river |
548 | River Strat catchment river water quality classification 1991 |
549 | River catchment management plans : data report |
550 | Hampshire salmon investigation report on salmon radio tracking 1991 |