Determining rainfall thresholds for landslide initiation :: A Case study in Wadas Lintang Watershed Wonosobo Central Java Province

TL;DRAbstract

Landsliding is one of the most damaging natural disasters in tropical countries, such as Indonesia, especially on the mountainous and hilly terrain area. The study area, Wadas Lintang Watershed in Wonosobo District, experiences landslide in yearly basis. Due to landslide, the area has been facing the loss of human lives and damages to properties. The landslide events commonly occur in rainy season, thus the rainfall can be regarded as the main trigger in the area. The condition has been being problematic due to lack of availability of information pertaining correlation between rainfall and persistent landslide events in this area. This research intends to determine rainfall thresholds for landslide initiation in the Wonosobo area using intensity – duration rainfall threshold and antecedent rainfall threshold; to determine return period of excessive rainfall event using Gumbel Distribution; to assess terrain hydrological properties through infiltration measurement, soil texture and pe

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