Study on the yearly variation of river geomorphology after sediment runoff due to large sediment yield in South-east Asia

2004年3月26日，印度尼西亚共和国南苏拉威西省Bawakaraeng火山火山口发生了巨大的滑坡，滑坡体沉积在Jeneberang河上游。本研究主要得出2个结论。首先，根据卫星影像分析和野外调查，研究了侵蚀沟地貌和输沙量的时间变化规律。第二，根据他们对放射性核素沉降物的分析，洪水时的沉积物来自于比平时更深的土层。

Gigantic landslide occurred at March 26, 2004, at the caldera of Mt Bawakaraeng, South Sulawesi Province, Republic of Indonesia, and landslide mass deposited at the upstream of Jeneberang River. In this research, 2 main results were derived. The first is time variation of geomorphology of eroded gully and sediment discharge according to satellite image analysis and field survey. The second is that sediment at flood comes from deeper soil layer than that at usual time according to ther analysis of fallout radionuclides.