Cell 11 Regional Monitoring Strategy (CERMS) 2009 Baseline Reporting
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Cell 11 Regional Monitoring Strategy (CERMS) 2009 Baseline Reporting Cell 11 Regional Monitoring Strategy (CERMS) 2009 Baseline Reporting Cell 11 Regional Monitoring Strategy (CERMS) 2009 Baseline Reporting Contents Amendment Record This report has been issued and amended as follows: Issue Revision Description Date Approved by 1 0 Draft Report 28th Jan 10 NP 2 1 Revised report 9th April 10 AP Halcrow Group Limited Burderop Park, Swindon, Wiltshire SN4 0QD Tel +44 (0)1793 812479 Fax +44 (0)1793 812089 www.halcrow.com Halcrow Group Limited has prepared this report in accordance with the instructions of their client, Sefton Council, for their sole and specific use. Any other persons who use any information contained herein do so at their own risk. © Halcrow Group Limited 2010 Metadata Addressee Aggregation Audience Coastal/Environmental Engineers Contributor(s) Coverage Cell 11: Great Orme’s Head to the Scottish Border (including sub-cells 11a, b, c, d and e) Creator Halcrow Group Ltd Date Description Cell 11 Regional Monitoring Strategy (CERMS) Baseline Reporting Format Text Identifier Language English Location Mandate CERMS Regional Monitoring Framework Publisher Sefton Council Relation Status Final Subject Coastal Processes Title CERMS 2009 Baseline Reporting Type Text/report Cell 11 Regional Monitoring Strategy (CERMS) 2009 Baseline Reporting Table of Contents LIST OF TABLES .................................................................................................................................... II LIST OF FIGURES.................................................................................................................................. III GLOSSARY .............................................................................................................................................IV EXECUTIVE SUMMARY.........................................................................................................................1 1 INTRODUCTION ............................................................................................................................2 1.1 CERMS OBJECTIVES..................................................................................................................................2 1.2 THE ROLE OF THIS REPORT ......................................................................................................................2 1.3 RELATED STUDIES......................................................................................................................................3 2 DATA AVAILABILITY ....................................................................................................................5 2.1 INTRODUCTION ........................................................................................................................................5 2.2 LOCAL FRAMEWORK DATA .....................................................................................................................5 2.3 CERMS STRATEGIC MONITORING..........................................................................................................6 2.4 SUMMARY OF DATA HELD IN EXISTING SANDS DATABASE..................................................................7 2.5 OTHER LOCAL DATA COLLECTED BUT NOT CURRENTLY RECORDED IN SANDS........................... 19 2.6 OTHER MONITORING PROGRAMMES ................................................................................................... 20 2.7 DATA / INFORMATION AVAILABLE FROM LINKED STUDIES ................................................................ 21 2.8 OTHER THIRD PARTY DATA SOURCES ................................................................................................ 23 3 CELL WIDE BASELINE ................................................................................................................24 3.1 INTRODUCTION ..................................................................................................................................... 24 3.2 EXISTING UNDERSTANDING ................................................................................................................. 24 3.3 ISSUES AND UNCERTAINTIES ................................................................................................................. 40 4 SUB-CELL BASELINES.................................................................................................................42 4.1 INTRODUCTION ..................................................................................................................................... 42 4.2 SUB CELL 11A ......................................................................................................................................... 43 4.3 SUB-CELL 11B ......................................................................................................................................... 65 4.4 SUB CELL 11 C ....................................................................................................................................... 79 4.5 SUB CELL 11 D..................................................................................................................................... 103 4.6 SUB CELL 11 E ...................................................................................................................................... 116 5 OPERATIONAL MATTERS........................................................................................................132 5.1 DATA COLLATION AND MANAGEMENT............................................................................................ 132 5.2 CONCLUSIONS FROM CERMS REVIEW.............................................................................................. 132 6 CONCLUSION.............................................................................................................................136 7 REFERENCES ...............................................................................................................................137 APPENDIX A i Cell 11 Regional Monitoring Strategy (CERMS) 2009 Baseline Reporting List of Tables Table 2.1 Sub-cell 11a fixed monitoring instruments…………………………………………... 8 Table 2.2 Sub-cell 11b fixed monitoring instruments…………………………………………... 12 Table 2.3 Sub-cell 11c fixed monitoring instruments…………………………………………... 14 Table 2.4 Sub-cell 11e fixed monitoring instruments…………………………………………... 17 Table 3.1 Uncertainties in present regional understanding…………………………………….. 41 Table 4.1 Extreme Sea Levels for North Wales (Atkins (2008) North Wales Tidal Flood Mapping Phase II Report)……………………………………………………………. 45 Table 4.2 Extreme Sea Levels for Central North West England (JBA Consulting (2007), Central Area Tidal Areas Benefiting from Defence. Final Sea Level Report)............... 46 Table 4.3 Sub-Cell 11a - Supporting information for Conceptual Understanding.......................... 49 Table 4.4 Extreme Sea Levels for Central North West England (JBA Consulting (2007), Central Area Tidal Areas Benefiting from Defence. Final Sea Level Report)............... 67 Table 4.5 Sub-Cell 11b - Supporting information for Conceptual Understanding.......................... 69 Table 4.6 Extreme Sea Levels for Central North West England (JBA Consulting (2007), Central Area Tidal Areas Benefiting from Defence. Final Sea Level Report)............... 82 Table 4.7 Extreme Sea Levels for North Area, North West England (JBA Consulting (2007), North Area Tidal Areas Benefiting from Defence. Final Sea Level Report)................. 83 Table 4.8 Sub-Cell 11c - Supporting information for Conceptual Understanding.......................... 85 Table 4.9 Extreme Sea Levels for North Area, North West England (JBA Consulting (2007), North Area Tidal Areas Benefiting from Defence. Final Sea Level Report)................. 105 Table 4.10 Sub-Cell 11d - Supporting information for Conceptual Understanding......................... 107 Table 4.11 Extreme Sea Levels for North Area, North West England (JBA Consulting (2007), North Area Tidal Areas Benefiting from Defence. Final Sea Level Report)................. 118 Table 4.12 Sub-Cell 11e - Supporting information for Conceptual Understanding......................... 120 ii Cell 11 Regional Monitoring Strategy (CERMS) 2009 Baseline Reporting List of Figures Figure 2.1 Overview of data currently held in SANDS, database Sub-cell 11a………………... 11 Figure 2.2 Overview of data currently held in SANDS, database Sub-cell 11b……………….... 13 Figure 2.3 Overview of data currently held in SANDS, database Sub-cell 11c ……………….. 15 Figure 2.4 Overview of data currently held in SANDS, database Sub-cell 11d………………... 16 Figure 2.5 Overview of data currently held in SANDS, database Sub-cell 11e………………… 18 Figure 3.1 Overview of Cell 11 study area, showing SMP2 sub-cell frontages………………… 25 Figure 3.2 Irish Sea bathymetry, Bathymetry of Halcrow’s Irish Sea Regional model………….. 26 Figure 3.3 Wind rose offshore from Barrow………………………………………………….... 27 Figure 3.4 Peak depth averaged flood currents in Cell 11…………………………………….... 29 Figure 3.5 Peak depth averaged ebb currents in Cell 11……………………………………….. 30 Figure 3.6 Residual (monthly average tidal currents)………………………………………….... 32 Figure 3.7 Wave roses for the Cell 11 coastline (adapted from Halcrow 2002)………………. 34 Figure 3.8 Distribution of sea-bed sediments. Classification after Folk (1954). Modified from Jackson et. al., (1995)………………………………………………………………… 36 Figure 3.9 Mean sea bed bottom stress. After Pingree and Griffiths (1979)…………………..