SEFTON and WEST LANCASHIRE Annual Local Monitoring Report 2015
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SEFTON AND WEST LANCASHIRE Annual Local Monitoring Report 2015 Final Report July 2016 Sefton Annual Local Monitoring Report 2015 Final Report July 2016 Produced by the Flood & Coastal Erosion Risk Management Team Locality Services Commissioned 3rd Floor, Magdalen House 30 Trinity Road Bootle L20 3NJ Tel: +44 (0)345 140 0845 e-mail: [email protected] This report has been prepared by Sefton Metropolitan Borough Council in accordance with the instructions of their client, the Flood & Coastal Erosion Risk Management Team. Any other persons who use any information contained herein do so at their own risk. Ordnance Survey mapping and aerial photography included in this report is provided by Sefton Council under licence in order to provide specialist coastal monitoring services. Persons viewing this mapping should contact Ordnance Survey copyright for advice where they wish to licence Ordnance Survey for their own use. Oblique Aerial Photography is provided under open licencing by the North West and North Wales Coastal Group. © Crown Copyright and database rights 2016 Ordnance Survey LA 100018192 Document History Record This report has been issued and amended as follows: Issue Revision Description Date 1 0 Draft 23/06/2015 2 1 Final 13/07/2016 Addressee Sefton Council Audience Coastal/Environmental Engineers/Students/Internal staff Contributor(s) Wave data and Tide data provided from SANDS internal database (Sefton Council) Coverage Coastal Frontage: Seaforth to the River Ribble Creator Sefton Council Date Created: 2015-06-16 Draft Issued: 2015-06-23 Final Issued: 2016-07-13 Description Report on data, the behaviour of coastal processes and comparison with previous years’ data Format Text, WORD, Pdf Identifier 2015_SMBC_Proc Keyword Sefton, West Lancashire, Ribble, Coastal, Monitoring, Local, NWRMF, CERMS Language English Location Sefton Metropolitan Borough Council, Magdalen House, 30 Trinity Road. Bootle. Mandate North West Regional Monitoring Framework Publisher Sefton Metropolitan Borough Council Relation 6th in series of annual and process reports Rights Copyright Sefton Metropolitan Borough Council Status Final Subject Coastal Monitoring Title Sefton & West Lancashire Annual Local Monitoring Report 2015 Type Text/report Date of metadata 2016-11-21 update Sefton and West Lancashire Annual Monitoring Report Contents: 1.0 Background 1.1 Governance 2.0 Introduction 2.1 Purpose 2.2 Key summary points from this report 2.2.1 Planned actions from the SMP 2.2.2 Uncertainties and issues 2.2.3 Recommendations for additional actions 2.2.4 Potential influences on SMP policies 3.0 Conceptual Model Liverpool Bay 3.1 How Liverpool Bay Works 3.2 What we expect to see happen in any one year 4.0 Crosby to Hightown Area Summary 4.1 Baseline Information 4.2 Site overview 4.3 Current (SMP2) policy (adopted 2010) 4.4 Policy and approach (from 2010) 4.5 Key assumptions made during development 4.6 Summary of behaviour 4.7 Risk assessment 4.7.1 What would risk look like 4.8 Uncertainties and issues 4.9 Planned actions from the SMP 4.10 Recommendations for actions 4.11 Potential influences on SMP policies 5.0 Formby Dunes Area Summary 5.1 Baseline Information 5.2 Site overview 5.3 Current (SMP2) policy (adopted 2010) 5.4 Policy and approach (from 2010) 5.5 Key assumptions made during development 5.6 Summary of behaviour 5.7 Risk assessment 5.7.1 What would risk look like 5.8 Uncertainties and issues 5.9 Planned actions from the SMP 5.10 Recommendations for actions 5.11 Potential influences on SMP policies 6.0 Southport Area Summary 6.1 Baseline Information 6.2 Site overview 6.3 Current (SMP2) policy (adopted 2010) 6.4 Policy and approach (from 2010) 6.5 Key assumptions made during development 6.6 Summary of behaviour 6.7 Risk assessment 6.7.1 What would risk look like 6.8 Uncertainties and issues 6.9 Planned actions from the SMP 6.10 Recommendations for actions 6.11 Potential influences on SMP policies 7.0 West Lancashire Area Summary 7.1 Baseline Information 7.2 Site overview 7.3 Current (SMP2) policy (adopted 2010) 7.4 Policy and approach (from 2010) 7.5 Key assumptions made during development 7.6 Summary of behaviour 7.7 Risk assessment 7.7.1 What would risk look like 7.8 Uncertainties and issues 7.9 Planned actions from the SMP 7.10 Recommendations for actions 7.11 Potential influences on SMP policies 1.0 Background 1.1 Governance Sefton Council is a Maritime Authority and Lead Local Flood Authority and as such has completed a Strategy setting out how it will manage flooding and coastal erosion in its area. Sefton Council’s vision in relation to this service area is ‘To improve the health and wellbeing of our communities through joint management of flood and coastal erosion risk’. The Council will deliver this through four key activities: • Understanding risk to our communities • Avoiding increase of risk to our communities • Reducing risk to our communities • Reducing consequences to our communities This report supports the delivery of the Strategy and will be linked back to the strategy. The Shoreline Management Plan is reflected in this strategy. Figure 1: Management of flood and coastal erosion risk Sefton West Lancashire Borough Council is a Maritime Authority and is a partner in the development and delivery of the Shoreline Management Plan. This report will help inform any decisions they may need to take to manage risk to their communities. The Environment Agency has a role both in terms of tidal flooding and an overview in relation to the delivery of the Shoreline Management Plan. This report will provide evidence to them in relation to the delivery of the Shoreline Management Plan and also provide supporting evidence for any management decisions they may take within the Ribble Estuary. The Shoreline Management Plan covers the area from the Solway Firth to the Great Orme (North West England and North Wales) and sets out the long term policy for the management of the coast in relation to tidal flood risk and coastal erosion. It sets the policies out over three time-periods (0-20, 20-50 and 50-100 years) but these are indicative only. A change between policies in different time-periods might be triggered by storm events, failure of defences, climate change or other changes in circumstances. The polices are: Policy Option Description Hold the line By maintaining or changing the current standard of protection. This policy includes those situations where work is carried out in front of the existing defences (such as beach recharge, rebuilding the toe of a structure, building offshore breakwaters and so on) to improve or maintain the standard of protection provided by the existing defence line. It also includes work behind existing defences (such as building secondary flood defences) where this work would form an essential part of maintaining the current coastal defence system. Advance the By building new defences on the seaward side of the original defences. Use of line this policy is limited to those policy units where significant land reclamation is considered. Managed By allowing the shoreline to move backwards or forwards, with management realignment to control or limit movement (such as reducing erosion or building new defences on the landward side of the original defences). No active Where there is no investment in coastal defences or operations. intervention Table 1: SMP policies The Maritime Authorities responsible for the Shoreline Management Plan aim to keep it relevant by regularly reviewing and updating the evidence upon which the policies are based and where necessary reviewing the policies. They will co-ordinate this through the North West and North Wales Coastal Group, the Northern Coastal sub-group and Liverpool Bay Coastal sub-group. This report will contribute to that process. Policy Option Description 2.0 Introduction 2.1 Purpose The purpose of this report is to review our policies and actions for coastal defence as set out in the Shoreline Management Plan (SMP) and supporting documents. To do this we will review our conceptual understanding of coastal processes as it forms the baseline for the development of our policies. We will also review progress against our action plan and compare this against what is happening on the coast (natural and human activity) to see if it needs updating in relation to the activities set out or their timing. To achieve this purpose this report will summarise our understanding of coastal processes, our policies and our action plans based on the following documents: • Local Flood Risk Strategy and coastal erosion • Shoreline Management Plan (SMP) • Crosby to Formby Point Strategy • Regional Process Report • CETASS (Cell Eleven Tide and Sediment Study) • Estuary Reports • Past Local Process Reports • Sefton Coast Adaptation study • Formby Point Erosion Report • Formby Point Caravan Site Report Reference should be made to these documents if you would like more detail on how our understanding, policies and actions have been developed. We do not expect our understanding or policies to change greatly year to year but the action plan will be updated as progress is made. This material will be reviewed against available information, for actions this will be up to the date of the report, for processes it will be based on the calendar year preceding this report. This will include changes on the coast, both natural and human, and actions undertaken to progress our policies. The monitoring of natural processes is based upon extensive data collection and analysis which is available in digital