Montgomery Canal Conservation Management Strategy (1.2MB PDF)

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The invertebrate fauna is one method by which this assessment is made, and the Agency data and survey work this year, has enabled a more canal specific assessment to be made. Perhaps surprisingly suspended sediment concentrations have not varied greatly either along the canal or over the last thirteen years. Total oxidised nitrogen is highest at Queen’s Head, and lowest in the south. In general there is a significant difference between lower water quality and higher nutrient levels in the English length, when compared to the canal in Wales. A computer analysis has plotted the invertebrate results for the ten sample sites from this year’s survey. The greatest variations, separates the England and Wales sites; but also shows correlation with navigation and water transparency. There is also a smaller correlation with dissolved oxygen and amount of aquatic vegetation cover. Results overall indicate a mesotrophic water canal, with some tendencies to eutrophic, and an invertebrate assemblage indicative of high water quality for a canal. 3.5.3 Vulnerabilities Supply • The Penarth and Tanat feeders both require significant engineering to the intakes and dams. • British Waterways does not currently control the flows from the River Morda intake. • Leakage is a significant problem in some sections of the canal, especially near Newhouse Lock in the southern Wales section, but also from the aqueducts and the Wern embankment. • Aqueduct failure would threaten all of the Wales length. These can all be addressed within a planned restoration programme. Quality • Eutrophication is a major vulnerability. Drainage from agricultural land is a major source, but further study would help quantify and inform priorities for remedial action. Other sources, almost certainly of much lower importance include grey water from boats, and artificial feeding of ducks, geese and fish. • Point sources of pollution have previously included the Rednal feeder, but this has since been rectified. Other localised sites have been identified and will require action. • Navigation particularly affects quality through increased turbidity, as a result of propeller action disturbing loose silt. This is exacerbated by inadequate dredging. Sediment disturbance can also return nutrients to the water column that had settled out, contributing to the eutrophication problem. • Low flows from the Penarth and Tanat feeders in times of low summer flows affect quality through reduced oxygen levels in the water, and also less dilution of nutrients. Algal blooms are one harmful consequence. 53
References for further information British Waterways, Water Development (1996) Montgomery Canal: Water Resources Study Summary. 9pp. British Waterways (2002) Border Counties Waterways Water Management Plan. 41pp. BWB (1986) Montgomery Canal Parliamentary Bill. An analysis of the water supply. 30pp. BWB (1986) Water Supply and Discharge Points. Series of 1:10,000 maps. BWB (Undated) Outfalls Discharging into Canal. 30pp. Environment Agency (2002) Severn Corridor CAMS. 28pp. Environmental Simulations International (esi) (2001) Upper Severn Area Hydrogeological and hydrological assessment of selected wetland sites. Montgomery Canal. 35pp. Smith (Oct 2002) Montgomery Canal Water Quality Review 1990 – 2002 Queens Head and Rednal Moss Feeder. 24pp. WRc plc (2004) Water Quality in the Montgomery Canal. Report for Environment Agency 73 pp. 54
Page 1 and 2:
Montgomery Canal: Regeneration thro
Page 3 and 4: ACKNOWLEDGEMENTS This document is t
Page 6 and 7: 1. INTRODUCTION Summary of chapter
Page 8 and 9: 1.1 THE PARTNERSHIP This Strategy h
Page 10 and 11: 1.3 COMPANION REPORTS Throughout th
Page 12 and 13: Llangollen Canal Frankton Junction
Page 14 and 15: 2.1 INTRODUCTION Many of the conser
Page 16 and 17: (Department for Culture Media and S
Page 18 and 19: A key aim of the Shropshire Tourism
Page 20 and 21: 3.1 LANDSCAPE HERITAGE 3.1.1 Overvi
Page 22 and 23: iv. The Canal The driving force beh
Page 24 and 25: Table 3.1. Montgomery Canal Corrido
Page 26 and 27: The country has been divided up int
Page 28 and 29: Although there is little natural wo
Page 30 and 31: References for further information
Page 32 and 33: they have undergone extensive repai
Page 34 and 35: xi. Water Economy The canal require
Page 36 and 37: iii. Canal-related industry The nat
Page 40 and 41: This Strategy seeks to further deve
Page 42 and 43: The Shropshire Biodiversity Action
Page 44 and 45: Mammals: Bats Pipistrelle Noctule D
Page 46 and 47: Figure 3.9. Luronium natans (Floati
Page 50 and 51: Overall the Welsh section is lightl
Page 52 and 53: 3.4.7 Paddlesports Currently the Ca
Page 56 and 57: 3.6 COMMUNITY AND VISITOR ACCESS 3.
Page 58 and 59: 3.6.2 Cycling Cycling is growing in
Page 62 and 63: 4. OPTIONS APPRAISAL Summary of cha
Page 64 and 65: Proposals for restoration in any fo
Page 66 and 67: 4.2.6 Option 3B: Option 3 + Additio
Page 68 and 69: OPTION 1 1B 2 2B 3 3B 4 4b 5 Archae
Page 70 and 71: 5. VISION Summary of chapter The pr
Page 72 and 73: In parallel to the engineering, and
Page 74 and 75: 6.1 LANDSCAPE HERITAGE 6.1.1 Existi
Page 76 and 77: 6.2.2 Local Implementation B) Briti
Page 78 and 79: 6.3.4 Monitoring Informs Action L)
Page 80 and 81: F) A transparent and impartial syst
Page 82 and 83: 6.6 COMMUNITY AND VISITOR ACCESS 6.
Page 84 and 85: 6.7.2 Visitor spend Visitor spend w
Page 86 and 87: 7. MANAGEMENT PROPOSALS Summary of
Page 88 and 89: Waterlogged sites, e.g. peat in the
Page 90 and 91: Suggested Canal gateway - enhanced
Page 94 and 95: 5) The Partnership will seek early
Page 96 and 97: Figure 7.5. Proposed Conservation A
Page 98 and 99: 7.2.4 Benign Neglect This is often
Page 102 and 103: Separate standards have been agreed
Page 104 and 105:
See also Sections 6.4 (Navigation)
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19) The Countryside Council for Wal
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30) Management will be by careful m
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References for further information
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1. Establishment of compensatory ha
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Table 7.6. Private boat moorings an
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trip day hire private visiting 6,00
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Day hire boats offer particular opp
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Figure 7.12. Dutch design electric
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Paddlesports are popular on the Mon
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9) It is proposed to keep the separ
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Urban areas and road run-off are im
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ii. Long Distance Routes 7) The Par
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Figure 7.16. Proposed Cycle Routes
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Upgrade path through school grounds
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ii. Commercial Fishing 24) Commerci
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These include: • Field Studies Co
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7.8 ECONOMIC AND RURAL REGENERATION
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7.8.3 Proposals 1) Local suppliers:
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8. PHASED RESTORATION Summary of ch
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8.1.1 Context Although this is a co
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8.2 THE CRITICAL PATH: PHASING Time
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Timescale is an indication, and wil
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vii. Belan Locks Previous temporary
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9.1 PHILOSOPHY The Montgomery is a
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Techniques and events included the
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What do you want conserved or prote
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4) A database of customer groups is
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10.1 NATIONAL SUSTAINABILITY INDICA
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EDUCATION BW-organised visits - num
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Table 10.3 Summary Conservation Obj
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AQUATIC VEGETATION - LOCAL DISTINCT
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10.3.3 Other Biological Monitoring
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Llantysilio Sluice Llantysilio Feed
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Page 176 and 177:
Table 11.1 Commitments to Action. F
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