426 | Classification of listed substances for the purposes of the EC groundwater directive (80/68/EEC) : technical report |
427 | Running with the tide : reconciling development pressures with flood risk and the environment |
428 | Water for the future in Kent : NRA response to the issues and options report |
429 | Review of flood defence practices on the Somerset Levels and Moors : the appendices |
430 | Review of flood defence practices on the Somerset Levels and Moors : the report |
431 | Investigation of the water quality in the Buckland stream up and downstream of East/West Buckland |
432 | The Effect of Atrazine Exposure on the Timing of Salmon (Salmo salar L.) Smolt Emigration |
433 | Planning for the rising tides : the Humber estuary shoreline management plan. Summary of proposals |
434 | Further surveys to elucidate the distribution of the fine-lined pea mussel Pisidium tenuilineatum Stelfox, 1918 |
435 | The influence of agriculture on the quality of natural waters in England and Wales |
436 | The physical character of rivers and streams in the UK and Isle of Man |
437 | The Distribution of Phytoplankton and Nutrients in the North East Irish Sea During 1998 |
438 | Biological assessment of the effects of Ivybridge Sewage Treatment Works on the River Erme |
439 | The impact of industrial discharges on metal levels in biota of the West Cumbrian coast - 1990 |
440 | Environmental monitoring of the Fal Estuary to support the Fal Swan study : final draft report |
441 | The impact of land use on salmonids (Report 30) : a study of the River Torridge catchment |
442 | The behaviour of atrazine and simazine within the chalk aquifer : experimental results and interpretation |
443 | A unified information system to satisfy the NRA's requirement for ecotoxicology information: the specification study |
444 | A Status Report on the Direct Oxygenation of the Tywi Estuary - October 1989 |
445 | A collation of the environmental impact work carried out following the Rosebay oil spill, May 1990 |
446 | The application of toxicity-based criteria for the regulatory control of wastewater discharges: a consultation document |
447 | An investigation into the effects of Alton sewage works on the River Wey North |
448 | Investigation into the impact of Henstridge sewage treatment works on the River Umber, North Devon |
449 | A brief history of the River Stour navigation : 1705 to the present day |
450 | The Investigation and Specification of Flow Measurement Structure Design Features that Aid the Migration of Fish |