| 426 | River Stort : draft catchment management plan for flood defence and the environment : May 1991 |
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| 427 | Catchment management plans : protecting and enhancing the water environment in an integrated manner |
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| 428 | Impact assessment of scour valve test at Roadford Reservoir on water quality of the River Lyd |
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| 429 | The Blythe/Cole/Bourne catchment management plan : first annual review : July 1994 to July 1995 (NRA Severn-Trent 48)
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| 430 | Micro low flows average and low flows estimation in the SW region : validation of regional version 1.3 software |
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| 431 | Mercury and methylmercury in the river Yare, Norfolk (1986 - 1992) (OI/420/8/A annex) : annex to main report |
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| 432 | Audit of priority species of rivers and wetlands : riverine and wetland molluscs in South Hampshire and the Isle of Wight |
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| 433 | Audit of priority species of rivers and wetlands : kingfisher Alcedo atthis in South Hampshire and the Isle of Wight |
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| 434 | Audit of priority species of rivers and wetlands : Marsh Fritillary in South Hampshire and the Isle of Wight |
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| 435 | Audit of priority species of rivers and wetlands : Bittern Botaurus stellaris in South Hampshire and the Isle of Wight |
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| 436 | Audit of priority species of rivers and wetlands : white-clawed crayfish Austropotambius pallipes in South Hampshire and the Isle of Wight |
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| 437 | Investigation into failures of the River Dalch from Canns Mill Bridge to below Lapford sewage treatment works (2001) |
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| 438 | The development of macroinvertebrate keys using TWINSPAN classification : a manual for NRA biologists (001/10/W) : draft final report |
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| 439 | Micro low flows average and low flow estimation in the SW region : validation of version 1.2 software |
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| 440 | River Stour (2), Sudbury : report of a river corridor survey carried out for the National Rivers Authority, Anglian region |
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| 441 | River Wissey investigations : linking hydrology and ecology : the basis for in-river flow management. Final Draft (OI/526/ ) |
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| 442 | River Glen : river channel assessment : annex B : an analysis of invertebrate records for the River Glen 1976-1991 |
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| 443 | River Glen : river channel assessment : annex C : an assessment of low flow characteristics of the River Glen, Lincolnshire |
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| 444 | The Warwickshire Avon catchment management plan : first annual review : October 1994 - October 1995 (NRA Severn -Trent 45)
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| 445 | Low flows and water resources : facts on the top 40 low flow rivers in England and Wales |
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| 446 | Micro low flows average and low flows estimation in the SW region : validation of regional version 1.1 software |
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| 447 | Low flows and water resources : facts on the top 40 low flow rivers in England and Wales |
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| 448 | Eutrophication in controlled waters in the Warwickshire Avon catchment (final report). Vol 1 : report and executive summary |
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| 449 | East Devon public water supply strategy : the existence and potential use in yield analysis of historic flow records |
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| 450 | An investigation into possible causes of poor water quality at Nymphayes Bridge (R30D009) on the Gissage Lake |
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