| 526 | ISCO automatic water sample data for the Wensum Demonstration Test Catchment's Kiosk M |
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| 527 | YSI, turbidity and discharge data for the Wensum Demonstration Test Catchment's monitoring kiosk M in 2014 |
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| 528 | YSI, turbidity and stage data for the Wensum Demonstration Test Catchment's monitoring kiosk A in 2012 |
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| 529 | Devon area internal report - further investigations into pipe discharges in the Lower Teign estuary |
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| 530 | Alleviation of low flow studies : the River Avon and its tributaries near Malmesbury : towards a solution |
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| 531 | A report on water quality issues within the Midford Brook catchment - June 1996 |
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| 532 | Investigation into the frequency of storm overflow operation at Bradworthy sewage treatment works (1996) |
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| 533 | Report on the By Brook low flow investigations : October 2001 : volume 2 : (figures, maps and appendices) |
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| 534 | Bathing water quality in England and Wales in 1993 : report of the National Rivers Authority |
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| 535 | Water pollution incidents in England and Wales - 1993 : report of the National Rivers Authority |
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| 536 | The Wandle, Beverley Brook, Hogsmill catchment management plan : consultation report summary : November 1994 |
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| 537 | The distribution of PCDDS and PCDFS in surface freshwater systems 2nd Interim Progress Report - February 1993 |
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| 538 | A study to investigate and propose remedies for river quality problems in the Madford catchment |
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| 539 | Regional river quality monitoring and surveillance : results of the 1990/1991 biological survey : draft report |
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| 540 | Impact assessment of Meldon quarry on water quality in the West Okement river |
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| 541 | R and D Strategy to Support Implementation of the Water Framework Directive - Preliminary Scoping Report |
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| 542 | The government's policy for a public regulatory body in a privatised water industry |
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| 543 | Less sensitive areas and candidate high natural dispersion areas in the North West region |
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| 544 | Water pollution incidents in England and Wales - 1990 : report of the National Rivers Authority |
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| 545 | Two year aesthetic survey of beaches in the South West (1990 and 1991) |
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| 546 | The Influence of Variations in Flow on General Quality Assessment of Rivers - Summary Document |
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| 547 | Annual classification of river water quality 1992 : numbers of samples exceeding the quality standard |
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| 548 | Water pollution incidents in England and Wales 1991 : report of the National Rivers Authority |
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| 549 | The Impact Of Grazing And Upland Management On Erosion And Runoff: Additional Information |
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| 550 | Extending Rutland yield analysis to 1933 : supporting documentation for the regional water resources strategy |
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