Change in drainage basin form in response to rainfall increase due to global warming and applications to hazard mitigation

考虑到近年来日本暴雨和泥沙灾害的增加，我们从地貌学、气候学和人文地理学的角度研究了暴雨引起的山区泥沙产生、输送和沉积及其社会影响。对于东亚和新西兰的不同研究区域，我们评估了1）滑坡敏感性，2）地质对滑坡的影响，3）影响冲积扇形成的因素，4）降雨特征，以及5）当地人民为减灾所做的努力。

Considering recent increase in heavy rainfall and sediment disasters in Japan, we investigated sediment production, transportation, and deposition in mountainous areas due to heavy rainfall and their social impacts from the viewpoints of geomorphology, climatology and human geography. For various study areas in East Asia and New Zealand, We assessed 1) landslide susceptibility, 2) effects of geology on landslides, 3) factors affecting alluvial-fan formation, 4) characteristics of rainfall, and 5) efforts of local people for disaster mitigation.