Fore­shore cli­mate ef­fect warn­ing

Western Suburbs Weekly - - News - FIRST RE­PORTED AT

Com­mu­ni­tynews be­cause of cli­mate change are not con­sid­ered in a pro­posal to build a sea­side swim­ming pool op­po­site the Ocean Beach Ho­tel.

“I know for a fact that in front of the OBH it’s all sand that could be sucked out by sea rises,” he said.

Mr Baver­stock mod­elled what ef­fect an an­nual 1mm in­crease in the sea level would have on beach­front de­vel­op­ment while con­sult­ing for Cottes­loe Coun­cil in 2010.

He said while the In­di­ana and Cottes­loe Beach Ho­tel sites were “quite sta­ble”, the OBH and south along the fore­shore to Napier Street were “vul­ner­a­ble” to the sea en­croach­ing an av­er­age 50m be­cause the build­ing and parks were on large sand dunes.

“I’m scep­ti­cal that it’s ge­o­log­i­cally sta­ble,” he said.

His modelling us­ing the coun­cil’s seis­mic sur­vey at the time in­di­cated 7m sea­walls could be needed along the Cottes­loe fore­shore north of the In­di­ana by 2100.

Mr Baver­stock said the coun­cil and res­i­dents were still “in­dif­fer­ent” to con­sid­er­ing cli­mate change ef­fects on the coun­cil’s $26 mil­lion fore­shore re­fur­bish­ment plan and any new pri­vate high-rise de­vel­op­ments.

“We should plan for the nat­u­ral ingress of the sea and al­low nat­u­ral beaches to form, be­cause oth­er­wise we will have to build sea­walls,” Mr Baver­stock said.

North Cottes­loe sea pool pro­po­nent Chris Shellabear would not com­ment on Mr Baver­stock’s con­cerns specif­i­cally, but said any pool would be built on bedrock, not dunes, about 6.5m above sea level.

He said a pro bono coali­tion of plan­ners, oceanog­ra­phers, ar­chi­tects and pump­ing ex­perts was seek­ing seis­mic data on the bedrock’s lo­ca­tion from the coun­cil.

Its ad­vice would be sent to the coun­cil when it held a fea­si­bil­ity study for sea pools.

Cottes­loe Mayor Jo Dawkins said the coun­cil would not com­ment on spe­cific pool sites un­til af­ter stud­ies were com­pleted.

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