Coastal flood risk management strategy, Pegwell Bay to Kingsdown

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what do these options mean for me?Nature can affect the coast and riverbanks in different ways. The level ofimpact depends on the current and future flooding and erosion risks in thedifferent reaches of the strategy. The condition of the existing flood defencesis also a factor in the impacts that can be expected as some are in bettercondition than others.The following identifies the impact on those reaches at risk of flooding if noaction is taken. Reaches 2, 5, 7 and 9 require do nothing or do minimum asdescribed later.Reach 1: Cliffs End to Stonar CutIf nothing is done, 14 propertieswould be flooded annually andtherefore lost by 2107. A further24 residential and commercialproperties would also beaffected by flooding, althoughthe damage to individualproperties would vary.It is also likely to lead toflooding of large stretches ofthe low-lying land of theWantsum Channel, while flooddamage to the A256 is alsoincreasingly likely.Reach 3: Sandwich Bay EstateAlthough the current defencesprovide sufficient protection tothe properties in Sandwich BayEstate now, if nothing is doneduring the next 100 years 38properties will be lost due toannual flooding by 2107. Afurther 54 properties would beaffected by flooding.Reach 4: Sandwich Bay Estateto Deal CastleAlmost 1,300 residential andcommercial properties arecurrently at risk of floodingduring an extreme tidal event(1 in 100 chance of occurringeach year). This would rise tomore than 4,000 by 2107 if noaction was taken, with many ofthose lost permanently.Along this reach the CinquePorts golf course is also likely tosuffer significant damage, whilethe promenade and Pier at Dealwould also become increasinglyvulnerable to flood damage.Reach 6: Walmer, Kingsdownand Oldstairs BayIn this reach the main problemis erosion of the coastline,which will move landward if nomeasures are taken to stop thisprocess. There would be asteady loss of property in thisreach and it is expected thatapproximately 177 propertieswould be lost by 2107.Reach 8: Sandwich and StonarLoopIn the current situation someflooding already occursoccasionally, most markedly atSandwich Quay. To date, thishas not resulted in the loss ofproperties but there has beensome flood damage to propertyin Sandwich in the past – mostnotably in 1953 and 1983.Almost 500 properties arecurrently at risk of floodingduring a tidal event with a 1 in 20chance of occurring each year.If no action was taken, by 2107some 1,400 properties would beaffected by flooding to varyingdegrees during significant tidalevents, with nearly 600properties affected so badlythat they would be lost.6 Environment Agency Pegwell Bay to Kingsdown coastal strategy
shortlisted optionsFor each of the nine reaches a number of appropriate options were shortlistedfor further analysis. To determine the preferred option each of thereaches has been considered in terms of:• flood and erosion risk to people and property;• climate change and predicted sea level rise;• cost of the option and value of protected assets;• impact on the natural environment.The following paragraphs outline the characteristicsof all nine reaches together with the short-listedoptions for the relevant reach. The leading optionfor each reach has been highlighted in blue.Pegwell Bay, Reach 1Reach 1: Cliffs End to Stonar CutThe only reach combiningcoastal and river frontages,the reach between Cliffs Endand the Stonar Cut comprisesthe left bank of the RiverStour downstream of theStonar Cut and the coastalfrontage of Pegwell Bay.Pegwell Bay Country Park hasa small embankment at itsperimeter boundary while theA256 provides furtherprotection to the land behind.There are no formal flooddefence structures along theriver frontage as the groundlevel north of RichboroughPort provides the protectionagainst flooding, while atRichborough Port itself, floodprotection is provided by theland behind the quayside.The inter-tidal mudflats onthe coast and the rivercorridor itself are ofinternational environmentalvalue.The Stonelees Golf Club islocated behind the A256.Strategic optionDo nothingDo minimumSustainImproveActionsNo further work will be undertaken on the existing defencesRepair A256 road and rock revetment as and when damage occursThe existing defences currently offer sufficient protection. To sustain thisprotection into the future the defences will need to be improved in about 50years, with a combination of walls and embankments adjacent to the A256Works are undertaken now to increase protection, with a combination of wallsand embankments adjacent to the A256Sustain has been selected because the existing level of protection is sufficient, although workswill be required in the future to allow for sea level rise. This option provides the best economicoption and will not have significant impact on the natural environment.Environment Agency Pegwell Bay to Kingsdown coastal strategy 7
Page 2 and 3: Published by:Environment Agency in
Page 4 and 5: the Pegwell Bay toKingsdown coastli
Page 8 and 9: Reach 2: Shell Ness to Sandwich Bay
Page 10 and 11: erosion risk andtidal flood risk10
Page 12 and 13: Reach 4 ...continuedImprove 1 has b
Page 14 and 15: Reach 8: Sandwich and Stonar LoopTh
Page 16 and 17: Reach 9: Stour ValleyAlong the Rive
Page 18 and 19: Notes18 Environment Agency Pegwell
Page 20: Would you like to find out more abo

Coastal flood risk management strategy, Pegwell Bay to Kingsdown

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