551 | River Usk barrage position statement, 18th January 1991 |
552 | Exe freshwater model : quasar model design |
553 | Catchment handbook : River Camel catchment : final draft report |
554 | River Itchen catchment management plan : consultation report |
555 | Macroinvertebrates of the River Nar : Great Ouse catchment : draft report |
556 | River Darent catchment management plan : consultation report |
557 | River Wissey investigations : linking hydrology and ecology March 1994 |
558 | Regional water quality monitoring and surveillance programme for 1992 : quality investigations in controlled waters |
559 | Upper Nene catchment management plan : consultation report summary |
560 | River Glen : river channel assessment : main report |
561 | Dorset Stour : first annual review : January 1998 - December 1998 |
562 | Norfolk Broadland : Halvergate Marsh Erosion Protection Scheme : contract number 7, engineer's report |
563 | Groundwater development scheme : Little Ouse and Thet catchment : control rules |
564 | Investigation of final effluent flow at Fluxton STW |
565 | Mersey sub-catchment report : February 1996 |
566 | Rising groundwater levels in the chalk-basal sands aquifer of the Central London Basin. Progress report, March 1995 |
567 | NRA baseline estuary and coastal waters monitoring programme |
568 | Upper Bristol Avon catchment management : consultation report |
569 | River Lynher catchment river water quality classification 1990 |
570 | Blythe/Cole/Bourne Catchment Management Plan Final Plan July 1994 |
571 | Discharge monitoring in the Kennet catchment. Part 1 : ecological effects of sewage and trade effluents |
572 | Mesotrophic rivers in Anglian region : progress report 4 December 1995 |
573 | Biological characteristics and exploitation of sea trout in the River Tywi during 1989 |
574 | Delabole Stream (abandoned minewater) water quality investigation (total zinc) |
575 | The Wandle, Beverley Brook, Hogsmill catchment management plan : consultation report summary : November 1994 |