Draft Great Ouse Catchment Flood Management Plan Summary Report – April 2010 Consultation Draft Managing Flood Risk We Are the Environment Agency
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Draft Great Ouse Catchment Flood Management Plan Summary Report – April 2010 Consultation Draft managing flood risk We are the Environment Agency. It’s our job to look after your environment and make it a better place – for you, and for future generations. Your environment is the air you breathe, the water you drink and the ground you walk on. Working with business, Government and society as a whole, we are making your environment cleaner and healthier. The Environment Agency. Out there, making your environment a better place. Published by: Environment Agency Kingfisher House Goldhay Way, Orton Goldhay Peterborough PE2 5ZR Tel: 08708 506 506 Email: [email protected] www.environment-agency.gov.uk © Environment Agency All rights reserved. This document may be reproduced with prior permission of the Environment Agency. Front cover photo: Denver Sluice. April 2010 Introduction I am pleased to introduce our summary of the draft Great Ouse Catchment Flood Management Plan (CFMP). This CFMP gives an overview of the flood risk in the Great Ouse catchment and sets out our preferred plan for sustainable flood risk management over the next 50 to 100 years. The Great Ouse CFMP is one of 77 CFMPs for England this risk. This is your opportunity to get involved in the and Wales. Through the CFMPs, we have assessed inland consultation and have your say. Your views are important. flood risk across all of England and Wales for the first In particular we would like your comments on: time. The CFMP considers all types of inland flooding, from rivers, ground water, surface water and tidal • our intended proposals for policy decisions; flooding, but not flooding directly from the sea (coastal flooding). This is covered by Shoreline Management • our intended actions to implement the selected Plans (SMPs). Our coverage of surface and groundwater policies. flooding is however limited due to a lack of available For more information about the Great Ouse CFMP information. consultation please go to: https://consult.environment- The role of CFMPs is to establish flood risk management agency.gov.uk/portal and follow the links for the Great policies which will deliver sustainable flood risk Ouse Catchment Flood Management Plan. The full copy management for the long term. This is essential if we are of the CFMP document is available to download from to make the right investment decisions for the future and the website or to obtain a hard copy of the document, to help prepare ourselves effectively for the impact of contact Nichola Carter by email: greatousecfmp@ climate change. We will use CFMPs to help us target our environment-agency.gov.uk or write to: Nichola Carter, limited resources where the risks are greatest. Environment Agency, Kingfisher House, Goldhay Way, Orton Goldhay, Peterborough. PE2 5ZR. We cannot reduce flood risk on our own. We will therefore work closely with all our partners to improve the co- We would prefer you to respond online through ordination of flood risk activities and agree the most our consultation page. This will help us to gather effective way to manage flood risk in the future. and summarise responses quickly and accurately. Alternatively you can respond by email or in writing This is a summary of the draft plan and no final decisions to the above address. have been made. We want to hear from you to help us to identify anything we may have missed in the preparation We will review all the comments received and use of this draft plan. The draft Great Ouse CFMP is out for the responses to finalise the Great Ouse CFMP. The public consultation from 29 March to 18 June 2010. completed CFMP will be published in late summer 2010. Please share with us your views on our recommended management options and any concerns you may have. We aim to get responses from interested groups or Paul Woodcock individuals on our understanding of flood risk within the Regional Director Anglian Region Great Ouse catchment and the best ways of managing Environment Agency Draft Great Ouse Catchment Flood Management Plan 1 Contents The purpose of a CFMP in managing flood risk 3 8 Saffron Walden and Thetford 28 9 Bury St Edmunds and Biggleswade/ Catchment overview 4 Sandy/Blunham 30 Current and future flood risk 6 10 The Fens 32 11 King’s Lynn/South Wootton 34 Future direction for flood risk management 12 Map of CFMP policies 36 Sub-areas 1 Bedford Ouse Rural and Eastern Rivers 14 2 Clipstone and the Great Ouse River Corridor 16 3 Cambridge, Godmanchester, Milton Keynes/ the Stratfords/Newport Pagnell and Hitchin 18 4 St Neots/Little Paxton, Bedford/Kempston and Leighton Buzzard 20 5 Buckingham, Edlesborough/Eaton Bray and Newmarket 22 6 Houghton/the Hemingfords/St Ives 24 7 Towcester, Shefford/the Flit Corridor, Alconbury/Alconbury Weston and Huntingdon/Brampton 26 River Great Ouse, Godmanchester 2 Environment Agency Draft Great Ouse Catchment Flood Management Plan The purpose of a CFMP in managing flood risk CFMPs help us to understand the • Internal Drainage Boards CFMPs aim to promote more scale and extent of flooding now (IDBs), water companies and sustainable approaches to managing and in the future, and set policies other utilities to help plan their flood risk. The policies identified in for managing flood risk within the activities in the wider context the CFMP will be delivered through a catchment. CFMPs should be used of the catchment; combination of different approaches. to inform planning and decision Together with our partners, we • transportation planners; making by key stakeholders such as: will implement these approaches • land owners, farmers and through a range of delivery plans, • the Environment Agency, who will land managers that manage projects and actions. use the plan to guide decisions and operate land for on investment in further plans, The relationship between the CFMP, agriculture, conservation projects or actions; delivery plans, strategies, projects and amenity purposes; and actions is shown in Figure 1. • regional planning bodies and • the public and businesses to local authorities who can use the enhance their understanding plan to inform spatial planning of flood risk and how it will activities and emergency be managed. planning; Figure 1 The relationship between CFMPs, delivery plans, projects and actions Policy planning • CFMPs and Shoreline Management Plans. • Action plans define requirement for delivery plans, projects and actions. Policy delivery plans (see note) Projects and actions • Influence spatial planning to reduce risk • Make sure our spending delivers the best and restore floodplains. possible outcomes. • Prepare for and manage floods • Focus on risk based targets, for example (including local Flood Warning plans). numbers of households at risk. • Managing assets. • Water level management plans. • Land management and habitat creation. Note: Some plans may not be led by us – we may • Surface water management plans. identify the need and encourage their development. Environment Agency Draft Great Ouse Catchment Flood Management Plan 3 Catchment overview The catchment of the Great Ouse Nearly half (44%) of the agricultural rock is non-porous mudstones, is located in the east of England. land in the Great Ouse catchment there are higher rates of rainfall The River Great Ouse starts in is grade one and two. Grade runoff, and runoff flows directly Northamptonshire near Brackley three makes up a further 45% of into the watercourses. In the areas and passes through several towns agricultural land. Most of the high where there is limestone or chalk before it crosses the Fens and quality land is located in the Fens. bedrock, runoff may infiltrate the flows into The Wash downstream rock delaying the response of The landscape of the catchment of King’s Lynn. Other significant rivers to rainfall and reducing peak varies significantly. Land is highest rivers in the catchment include the flows. There is also a risk from to the west of Milton Keynes Tove (Towcester), Ouzel (south of groundwater flooding in these and in the southern parts of the Milton Keynes), Cam (Cambridge), areas. In the headwaters of the catchment. The River Great Ouse Ivel (Biggleswade), Lark (Bury St catchment the underlying limestone flows east through relatively steep Edmunds/Mildenhall), Little Ouse and chalk is covered by till deposits land around Buckingham before (Thetford) and Wissey (south and which make the rivers respond more flowing northeast towards Bedford. east of Downham Market). Map quickly. In the lower fenland areas From Bedford, the river flows over 1 shows the location and extent in the east of the catchment, the a relatively moderate gradient of the Great Ouse CFMP area. The peat soils and low gradients mean in a north easterly direction downstream limit of the CFMP is that water moves slowly to the river towards Earith before entering the located near the confluence with channels. embanked tidal reach across the Babingley Brook, at The Wash Fens. The Fens are approximately Within the Great Ouse catchment Shoreline Management Plan (SMP) one fifth of the total catchment there are a number of sites boundary. The Wash SMP deals with area. Much of the Fens lie at or designated for their environmental coastal flood management issues below sea level and depend on importance including seven Ramsar from The Wash. The CFMP considers pumping stations for drainage. sites, three Special Protection tidal flood risk along the River Great Internal Drainage Boards play an Areas (SPAs), 11 Special Areas Ouse upstream of the confluence important role in managing water of Conservation (SACs) and 241 with Babingley Brook, to the tidal levels and flood defences within Sites of Special Scientific Interest limit at Brownshill Staunch near these low-lying areas. (SSSIs). The Ouse Washes (Ramsar, Earith. SPA and SAC) is an important site The underlying geology of the The overall catchment area is about in the CFMP area.