East Cambridgeshire District Council Water Cycle Study Detailed ...
East Cambridgeshire District Council Water Cycle Study Detailed ... East Cambridgeshire District Council Water Cycle Study Detailed ...
Stage 2 Water Cycle Study: Final Report Sept 2011 46 Cambridgeshire Horizons East Cambridgeshire – Detailed WCS It is noted from information supplied by Natural England that a new wind pump has been recently installed which will abstract water from Monks Lode during the winter, hence there will be some additional abstraction from Monks Lode which feeds Wicken Lode and may affect the ability of Wicken Lode to prevent backflow from Burwell Lode/Reach Lode. However, this is a complex hydrodynamic scenario which would require detailed modelling that is beyond the scope of the current commission. Therefore such an analysis will need to be undertaken as part of the application for an increase to the consented discharge volumes at Burwell. 3.3.2 Cam Washes SSSI Burwell Lode flows west from the village of Burwell and joins Reach Lode approximately 1km upstream of the River Cam which is the watercourse into which Reach Lode drains. The Cam Washes are offline meadows which depend upon seasonal inundation from the River Cam to maintain their ornithological interest. Water quality is of some importance but the ornithological interest is probably influenced more by inundation period/depth and vegetation management regime than it is by water quality 33 . Burwell and Bottisham WwTW’s will both require changes to their discharge consents to ensure ‘no deterioration’ in the quality of the receiving watercourses as a result of the increased discharge volumes from each WwTW. In neither case can this be achieved within the limits of conventional treatment (although for Bottisham this relates to the necessary nitrate standard rather than the phosphorus standard, which can be achieved within the limits of BAT). For both WwTW’s therefore solutions beyond the limits of conventional treatment will be required. Given that water quality is not the major factor for the ecological condition of the Cam Washes SSSI (although it is an important factor) and, more importantly, that Burwell WwTW and Bottisham WwTW are likely to make a relatively small contribution to phosphorus loads in the downstream River Cam 34 , it is reasonable to conclude that the upgrades necessary to achieve ‘no deterioration’ in the receiving watercourse should adequately address the WwTW’s individual contribution to phosphorus loading in the River Cam. However, this will need to be verified at the detailed application level. 3.3.3 New River/Monks Lode County Wildlife Site The same ECON Consultancy survey that was undertaken for spined loach on Wicken Lode also recorded a spined loach density of 0.22 individuals per m 2 for Monk’s Lode. In addition to spined loach, Monks Lode contains a number of other fish species including bitterling, bream, dace, eel, perch, roach and pike. The lodes (including Monks Lode) also contain various communities of submerged and floating-leaved aquatics which belong to the class Potametea and are part of the SSSI interest. Drainers Dyke, and the part of Wicken Lode above its junction with Monks' Lode, contain much Nuphar lutea (Yellow Water-lily), together with Sagittaria sagittifolia (Arrow-head) and Potamogeton lucens (Shining Pondweed). This is the species-poor subcommunity of the Nuphar lutea community [A8a] belonging to the Nymphaeion alliance. 33 View supported by BTO Research Report no. 431 Survey and Assessment of the Birds of Berry Fen and Cam Washes SSSIs 34 Smith JT. 2005. PAPER 14-05 MODELLING THE BIO-ACCUMULATION OF 32P AND 33P IN FRESHWATER SYSTEMS. http://www.ndawg.org/documents/Paper14-05_000.pdf The average P loading for the River Cam according to this paper is 0.49 mg/l i.e.147 kg P flows through the River Cam per day, since the flow rate in the River Cam is of the order of 300,000 cubic metres per day. This compares with the additional discharges from Burwell and Bottisham WwTW which will release an average additional 76 g P per day (i.e. approximately 0.05% of the loading in the River Cam) not all of which will reach the River Cam.
Legend Stage 2 Water Cycle Study: Final Report Sept 2011 47 Cambridgeshire Horizons East Cambridgeshire – Detailed WCS The Outline Water Cycle Study identified a potential connection between discharges of Burwell WwTW and the New River via Catchwater Drain which is the receiving watercourse for the WwTW. Further scrutiny for the Detailed WCS has identified that before the New River flows through Wicken Fen (at which point it is also known as Monks Lode) it bifurcates with a significant proportion of the flow (up to 50% according to the EA RoC for Wicken Fen) being directed down the Catchwater Drain, which in turn drains to Burwell Lode. As such, the prevailing direction of flow will in fact prevent significant backflow into the New River and there is thus no evidence of a connection between Burwell WwTW and Monks Lode. Upware Sluice rivers " dam plastic membrane isolated drain clay bank wicken fen Drainer's Dyke Verral's Fen " " Wicken Lode Reach Lode " Sedge Fen Wicken Dyke Wicken Fen Pumping Station discharge point Monk's Lode Burwell Lode New River 3.3.4 Ouse Washes SAC/SPA/Ramsar site/SSSI Catchwater Drain Kilometers New River ± 0 0.25 0.5 1 1.5 2 © Crown copyright. All rights reserved. Environment Agency, 100026380, 2006. bifurcation Haddenham WwTW was identified in the Outline WCS as potentially contributing to an ‘in combination’ increase in phosphorus loadings in the Great Ouse as it traverses the Ouse Washes. However, the Environment Agency Review of Consents report concluded that the consented discharges were unlikely to lead to a significant effect and Haddenham is not proposed for any changes to the current consent.
- Page 1 and 2: East Cambridgeshire District Counci
- Page 3 and 4: Table of Contents Cambridgeshire Ho
- Page 5 and 6: Executive Summary Stage 2 Water Cyc
- Page 7 and 8: Stage 2 Water Cycle Study: Final Re
- Page 9 and 10: Surface Water Drainage Management S
- Page 11 and 12: SWM5 - Linkages to SWMP and SFRA St
- Page 13 and 14: Glossary of Acronyms and Abbreviati
- Page 15 and 16: Abbreviation Description RTPI Royal
- Page 17 and 18: 1.3 Stage 2 - Study Governance Stag
- Page 19 and 20: Stage 2 Water Cycle Study: Final Re
- Page 21 and 22: • Surface Water Management Plan f
- Page 23 and 24: 2 Proposed Growth 2.1 Preferred Gro
- Page 25 and 26: 2.3 Employment Stage 2 Water Cycle
- Page 27 and 28: Figure 2-1: Potential development s
- Page 29 and 30: Relevant WwTW Stage 2 Water Cycle S
- Page 31 and 32: Stage 2 Water Cycle Study: Final Re
- Page 33 and 34: WwTW Soham Burwell Bottisham Hadden
- Page 36 and 37: 3.2.2 Results Discussion WwTW Soham
- Page 38 and 39: WwTW Consent parameter Stage 2 Wate
- Page 40 and 41: Stage 2 Water Cycle Study: Final Re
- Page 42 and 43: Stage 2 Water Cycle Study: Final Re
- Page 44 and 45: Stage 2 Water Cycle Study: Final Re
- Page 46 and 47: Table 3-7: Potential Impact of Clim
- Page 48 and 49: 3.3 Ecological Appraisal Stage 2 Wa
- Page 52 and 53: Stage 2 Water Cycle Study: Final Re
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- Page 60 and 61: 3.4.1 Stage 2 network assessment re
- Page 62 and 63: Site Description of potential waste
- Page 64 and 65: Site Description of potential waste
- Page 66 and 67: Bottisham Site Assessment Site Desc
- Page 68 and 69: Stage 2 Water Cycle Study: Final Re
- Page 70 and 71: Impact on Supplies Stage 2 Water Cy
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- Page 74 and 75: Stage 2 Water Cycle Study: Final Re
- Page 76 and 77: Low flow taps and showers Stage 2 W
- Page 78 and 79: Stage 2 Water Cycle Study: Final Re
- Page 80 and 81: Figure 4-1: A typical domestic rain
- Page 82 and 83: Stage 2 Water Cycle Study: Final Re
- Page 84 and 85: Medium Scenario The key assumptions
- Page 86 and 87: Table 4-7: Details of new Build Spe
- Page 88 and 89: WN Scenario New development Water u
- Page 90 and 91: Operation of GWR £30 per annum 82
- Page 92 and 93: Table 4-12: Estimated Cost of Neutr
- Page 94 and 95: Figure 4-3: CO2 emissions from a
- Page 96 and 97: Stage 2 Water Cycle Study: Final Re
- Page 98 and 99: 4.4.7 Preferred strategy - delivery
Legend<br />
Stage 2 <strong>Water</strong> <strong>Cycle</strong> <strong>Study</strong>: Final Report<br />
Sept 2011<br />
47<br />
<strong>Cambridgeshire</strong> Horizons<br />
<strong>East</strong> <strong>Cambridgeshire</strong> – <strong>Detailed</strong> WCS<br />
The Outline <strong>Water</strong> <strong>Cycle</strong> <strong>Study</strong> identified a potential connection between discharges of Burwell<br />
WwTW and the New River via Catchwater Drain which is the receiving watercourse for the<br />
WwTW. Further scrutiny for the <strong>Detailed</strong> WCS has identified that before the New River flows<br />
through Wicken Fen (at which point it is also known as Monks Lode) it bifurcates with a<br />
significant proportion of the flow (up to 50% according to the EA RoC for Wicken Fen) being<br />
directed down the Catchwater Drain, which in turn drains to Burwell Lode. As such, the<br />
prevailing direction of flow will in fact prevent significant backflow into the New River and there<br />
is thus no evidence of a connection between Burwell WwTW and Monks Lode.<br />
Upware Sluice<br />
rivers<br />
" dam<br />
plastic membrane<br />
isolated drain<br />
clay bank<br />
wicken fen<br />
Drainer's<br />
Dyke<br />
Verral's<br />
Fen<br />
"<br />
"<br />
Wicken<br />
Lode<br />
Reach Lode<br />
" Sedge Fen<br />
Wicken<br />
Dyke<br />
Wicken Fen Pumping Station discharge point<br />
Monk's<br />
Lode<br />
Burwell Lode<br />
New<br />
River<br />
3.3.4 Ouse Washes SAC/SPA/Ramsar site/SSSI<br />
Catchwater<br />
Drain<br />
Kilometers<br />
New<br />
River<br />
±<br />
0 0.25 0.5 1 1.5 2<br />
© Crown copyright. All rights reserved.<br />
Environment Agency, 100026380,<br />
2006.<br />
bifurcation<br />
Haddenham WwTW was identified in the Outline WCS as potentially contributing to an ‘in<br />
combination’ increase in phosphorus loadings in the Great Ouse as it traverses the Ouse<br />
Washes. However, the Environment Agency Review of Consents report concluded that the<br />
consented discharges were unlikely to lead to a significant effect and Haddenham is not<br />
proposed for any changes to the current consent.
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