| 526 | Two year aesthetic survey of beaches in the South West (1990 and 1991) |
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| 527 | The Influence of Variations in Flow on General Quality Assessment of Rivers - Summary Document |
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| 528 | Annual classification of river water quality 1992 : numbers of samples exceeding the quality standard |
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| 529 | Water pollution incidents in England and Wales 1991 : report of the National Rivers Authority |
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| 530 | The Impact Of Grazing And Upland Management On Erosion And Runoff: Additional Information |
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| 531 | Extending Rutland yield analysis to 1933 : supporting documentation for the regional water resources strategy |
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| 532 | Investigation into the intermittent failure of Wembury Beach to comply with EC bathing water |
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| 533 | The River Babingley. Volume 1 : executive summary : a report for National Rivers Authority, Anglian Region |
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| 534 | The effect of ferric dosing of lakes on benthic invertebrates : first year report |
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| 535 | The hydrological effects of demand management : project definition stage report : 28th May 1996 |
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| 536 | Improved monitoring for surface water quality : the development of a manual of best practice |
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| 537 | YSI, turbidity and stage data for the Wensum Demonstration Test Catchment's monitoring kiosk D in 2011 |
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| 538 | YSI, turbidity and stage data for the Wensum Demonstration Test Catchment's monitoring kiosk B in 2011 |
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| 539 | Routine laboratory water sample data for the Wensum Demonstration Test Catchment's monitoring kiosk A |
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| 540 | Use Of Pattern Recognition To Identify The Source Of An Oil Spill On An Inland Water |
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| 541 | Evaluating the impact of groundwater abstraction on key conservation sites. Stage 1 reports for AMP3 |
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| 542 | Report on the By Brook low flow investigations : October 2001 : volume 1 : report |
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| 543 | Routine laboratory water sample data for the Wensum Demonstration Test Catchment's monitoring kiosk E |
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| 544 | Demand for irrigation water (413/1/A) : progress report for the period August 1992 to January 1993 |
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| 545 | Future water resources in the Thames Region : a strategy for sustainable management : summary document |
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| 546 | Future water resources in the Thames Region : a strategy for sustainable management. June 1994 |
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| 547 | Groundwater management in the North West: efficiency review and business plan: certificate in management |
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| 548 | Environmental impact assessment in relation to water resources authorisations : guidance on the requirements and procedures |
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| 549 | Impact assessment of Helston Sewage Treatment Works on water quality of the River Cober Loe Pool |
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| 550 | An audit of performance in the analysis of biological samples in 1998. Environment Agency : AQC audit |
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