Analysis of Vulnerability of Immovable Cultural Relics in Extreme Rainstorm——Taking the "7.20" Rainstorm in Henan as An Example
Extreme rainstorms often cause great damage to immovable cultural relics.Analysis on the post-disaster damage can provide crucial insights for effective preventive measures.Through compil-ing post-disaster survey data from 188 immovable cultural relics affected by the"7·20"rainstorm in Henan Province in 2021,different characteristics of damage were analyzed.Damage types were cate-gorized into:slow erosion and deterioration caused by rainstorm runoff and water immersion,as well as sudden destruction due to flood impact and debris flow.In addition,accumulated rainfall was used to characterize the hazard intensity of rainstorm disasters,and a vulnerability curve model based on Lognormal probability distribution function was constructed.The vulnerability characteristics of im-movable cultural relics were comprehensively analyzed,considering structural materials,building scale,and preservation state.The results showed that brick-soil structure relics were more vulnerable than brick-wood and brick-stone structures,with a higher probability of serious damage when rainfall exceeded 100 mm.Brick-wood and brick-stone structure relics had a higher probability of serious dam-age when rainfall exceeded 340 mm.Cultural relics with construction areas under 100 m2 were particu-larly vulnerable,experiencing severe damage during extreme rainstorms.Cultural relics in poor preser-vation states were more vulnerable and had a higher probability of serious damage even at very low rainfall intensity(less than 25 mm).
immovable cultural relicsrainstorm disasterpost-disaster surveydamage characteristicsvulnerability curves
国家科技期刊平台
NSTL
万方数据
