251 | Catches of migratory fish in the River Don, Aberdeenshire |
252 | Stream survey and assessment in the Ashford and Folkestone areas |
253 | Lakes, Ponds and Reservoirs in the Southern Region (NRA) |
254 | The 1990 river and estuary classification survey of England and Wales |
255 | The evaluation of an orion ammonium ion selective electrode (220/15/T) |
256 | Anthropogenic Impacts on the Hydrology of Rivers and Lochs |
257 | Model For Investigating The Impacts Of Groundwater Abstraction |
258 | The Impact of Grazing and Upland Management on Erosion and Runoff |
259 | Water resources for the future : a strategy for Midlands Region |
260 | Water resources for the future : a strategy for Southern region |
261 | The feasibility of biomanipulation in reservoirs and deeper lakes : draft final report |
262 | Distribution of Azolla in the Great Ouse catchment |
263 | Investigation into the cause of high phenols in Budleigh Brook (1998) |
264 | Non-compliance of the Bidwell Brook with river quality objectives |
265 | An investigation into the sewage system and storm overflow at Beer (1997) |
266 | Sustainable urban drainage : an introduction : protecting the quality of our environment |
267 | Identification of water quality problems in the Strat and Neet catchments |
268 | Method for the assessment of river water quality using benthic macroinvertebrates |
269 | The National Groundwater and Contaminated Land Centre (NGWCLC) |
270 | The greening of Grasmere: its plankton periodicity in 1988 |
271 | Policy and practice for the protection of groundwater - Thames region appendix |
272 | The Yarrow catchment : recommendations for statutory water quality objectives |
273 | Targeted Monitoring Programme for Pharmaceuticals in the Aquatic Environment |
274 | The Louth coastal catchment management plan : final report |
275 | Fine sediment deposition in the River Keer : geomorphological assessment |