| 4501 | River quality : 1993 |
|---|
| 4502 | Metal contamination of sediments an statutory quality objectives R and D (331/8/N) |
|---|
| 4503 | Effects on gammarus of sediments impacted by watercress farms |
|---|
| 4504 | Synoptic State of the Environment Monitoring |
|---|
| 4505 | Northern sea wall (Reculver) improvement works : environmental statement : non-technical summary |
|---|
| 4506 | Evaluation of the effectiveness of the Water Fringe Option Scheme on Environmental Quality |
|---|
| 4507 | Monitoring of rivers and effluents |
|---|
| 4508 | Environmental Protection Act 1990 Best Practical Environmental Option and Other Assessment Methods: Case Study Comparisons |
|---|
| 4509 | The River Conwy catchment management plan : action plan (bilingual) : 1995: Cynllun Gweithrediad Cynllun Rheoli Dalgylch yr Afon Conwy 1995 |
|---|
| 4510 | Isle of Wight catchment management plan : consultation report |
|---|
| 4511 | Spring Carp Mortality Syndrome (SCMS) Transmission Study |
|---|
| 4512 | Hampshire salmon investigation report on salmon radio tracking 1991 |
|---|
| 4513 | Focus on Biodiversity Update 2002 |
|---|
| 4514 | R and D Strategy to Support Implementation of the Water Framework Directive - Preliminary Scoping Report |
|---|
| 4515 | River Corridor Surveys
|
|---|
| 4516 | Technical services available to NRA staff |
|---|
| 4517 | Land drainage consent report : investigation of the conservation input into land drainage consents |
|---|
| 4518 | Guidance on the Assessment of Cause and Effect in Ecological Risk Assessment |
|---|
| 4519 | Flood defence levels of service : stage 2 annex B (Note 127) : land use assessment |
|---|
| 4520 | The rehabilitation of the River Taff |
|---|
| 4521 | Electron Microscope Image: Filament of Oscillatoria being ingested by the ciliate Nassula tumida |
|---|
| 4522 | The government's policy for a public regulatory body in a privatised water industry |
|---|
| 4523 | Bideford flood plan : public information leaflet |
|---|
| 4524 | Upper Lee catchment management plan : final plan : September 1994 |
|---|
| 4525 | Restoration of Riverine Trout Habitats - A Guidance Manual |
|---|
