501 | Bathing water quality in England and Wales in 1993 : report of the National Rivers Authority |
502 | Water pollution incidents in England and Wales - 1993 : report of the National Rivers Authority |
503 | The Wandle, Beverley Brook, Hogsmill catchment management plan : consultation report summary : November 1994 |
504 | The distribution of PCDDS and PCDFS in surface freshwater systems 2nd Interim Progress Report - February 1993 |
505 | A study to investigate and propose remedies for river quality problems in the Madford catchment |
506 | Regional river quality monitoring and surveillance : results of the 1990/1991 biological survey : draft report |
507 | Impact assessment of Meldon quarry on water quality in the West Okement river |
508 | R and D Strategy to Support Implementation of the Water Framework Directive - Preliminary Scoping Report |
509 | The government's policy for a public regulatory body in a privatised water industry |
510 | Less sensitive areas and candidate high natural dispersion areas in the North West region |
511 | Water pollution incidents in England and Wales - 1990 : report of the National Rivers Authority |
512 | Two year aesthetic survey of beaches in the South West (1990 and 1991) |
513 | Annual classification of river water quality 1992 : numbers of samples exceeding the quality standard |
514 | Water pollution incidents in England and Wales 1991 : report of the National Rivers Authority |
515 | The Impact Of Grazing And Upland Management On Erosion And Runoff: Additional Information |
516 | Extending Rutland yield analysis to 1933 : supporting documentation for the regional water resources strategy |
517 | Investigation into the intermittent failure of Wembury Beach to comply with EC bathing water |
518 | The River Babingley. Volume 1 : executive summary : a report for National Rivers Authority, Anglian Region |
519 | The effect of ferric dosing of lakes on benthic invertebrates : first year report |
520 | The hydrological effects of demand management : project definition stage report : 28th May 1996 |
521 | Improved monitoring for surface water quality : the development of a manual of best practice |
522 | YSI, turbidity and stage data for the Wensum Demonstration Test Catchment's monitoring kiosk D in 2011 |
523 | YSI, turbidity and stage data for the Wensum Demonstration Test Catchment's monitoring kiosk B in 2011 |
524 | Routine laboratory water sample data for the Wensum Demonstration Test Catchment's monitoring kiosk A |
525 | Use Of Pattern Recognition To Identify The Source Of An Oil Spill On An Inland Water |