Analyzing Green Space as a Flooding Mitigation – Storm Chaba case in South Korea.

초록

A tropical storm Chaba hit the southeastern part of South Korea in 2016. Ulsan, the 8(th) largest city in terms of the number of population, was especially damaged with heavy flooding, and the calculated damage was approximately $500million.ByusingNormalizedDifferencesinVegetationIndex(NDVI),fourdistrictsand46sub-districtsinUlsancity,SouthKorea.Analysisresultsindicatethathavingahigherproportionofgreenspaceinsideacitycouldhaveareductioneffectonfloodingrisks.1km(2)ofincreaseingreenspacecouldreducefinancialinsurancepaymentoffloodingby$44,099. In addition, an increase in non- green space also could have raised insurance payment by $691,094.Theresultconfirmsthatgreenspaceinsidefloodplainismoreeffectivethanitsexistenceoutsidefloodplain.Thedifferenceisabout21times($44,099 vs. $953,755). Green space can mitigate flooding impact to a certain degree and it could be used to determine how natural disaster policy in municipal level should be organized. In addition, it can also provide a foundation for claiming insurance payments to those facilities without careful considerations on environmental planning.

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