| On September 25 and 26、2009、Typhoon Ondoy struck the south-west island of the Luzon islands in the Philippines. Heavy rainfall affected 4.9 million people、causing 501 fatalities. In the middle of October 2009、Typhoon Pepeng struck in and around Baguio City、located in the northern part of the Luzon islands. Heavy rainfall caused a large number of landslides、and 4.5 million people were affected、totaling 539 fatalities. This is a survey report of the great water related disasters that occurred in the Philippines and that were caused by Typhoons Ondoy and Pepeng. The report is focused on the extensive urban flood disaster that occurred in Metro Manila and on the landslides that occurred in and around Baguio City. The investigation was managed and carried out by an interdisciplinary team including a geologist、a geophysical scientist、a geographer、a sociologist、and an anthropologist. This research reveals that changes in socio-economic conditions increases vulnerability to disasters and thereby exacerbates damage. It is suggested that future rapid population growth in urban areas along with global warming could further increase vulnerability to disasters in developing countries. |