Spatiotemporal Hotspots and Decadal Evolution of Extreme Rainfall-Induced Landslides: Case Studies in Southern Taiwan

The 2009 Typhoon Morakot triggered numerous landslides in southern Taiwan, and the landslide ratios Ailiao Tamali river watershed were 7.6% 10.7%, respectively. sediment yields from that deposited gullies narrow reaches upstream of watersheds dominated recovery evolution 2010 to 2015. Rainfall records annual inventories 2005 2015 used analyze identify hotspots. time after was estimated as 5 years Morakot. easily induced, enlarged, or difficult recover during oscillating period, particularly sub-watersheds, with a ratio > 4.4%. return period threshold rainfall-induced <2 years, types new enlarged bank-erosion landslide, headwater reoccurrence old landslide. hotspot areas 2.67–2.88 times larger using emerging hot spot analysis, most cases identified into sporadic consecutive results can contribute developing strategies management dense