AUTHOR=Qin Haiyan , He Jun , Guo Jian , Cai Lu 

TITLE=Developmental characteristics of rainfall-induced landslides from 1999 to 2016 in Wenzhou City of China

JOURNAL=Frontiers in Earth Science

VOLUME=Volume 10 - 2022

YEAR=2022

URL=https://www.frontiersin.org/journals/earth-science/articles/10.3389/feart.2022.1005199

DOI=10.3389/feart.2022.1005199

ISSN=2296-6463

ABSTRACT=Many landslides are triggered by strong precipitation. In the eastern part of China, extreme rainfall-triggered landslides caused by typhoons in the monsoon season are the main geomorphological process that commonly has catastrophic impacts on society and the environment. In this study, Wenzhou City in east China was taken as the study area and we compiled a detailed inventory of rainfall-triggered landslides between 1999 and 2016. The development laws of these landslides were analyzed with an emphasis on the tempo-spatial distribution characteristics. The results showed that most of the landslides were located in the mountainous area of the western part of Wenzhou City. Typhoon rainfall-triggered landslides commonly occurred concentratedly during a short period and more than 70% of the landslides occurred from July to September. The main landslide type in the region is debris flow, most of which had small scale but with severe effects due to large elevation differences and long runout distance. Because the precipitation in typhoon events is commonly extreme, the initiation area of most landslides is kept in coincidence with the region where the highest hourly precipitation happened. The results can provide references and scientific guides for landslide early warning and risk reduction in the study area.