Typhoon Morakot of December 31, 2009 brought a great amount of rainfall in southern Taiwan, which triggered numerous slopeland disasters in Kaohsiung City. The Xiaolin Village was hit by a catastrophic landslide and debris flow and the entire village was nearly razed to the ground, over 47 residents are believed to have been buried alive. The tragedy caused the public more and more attention on prevention works for debris flow hazards. And with increasing advancement of mobile technology, more and more devices are able to be equipped with wireless network. The small handheld mobile device is the most convenient and if it is able to be functioned with the integration with debris flow disaster management system, the disaster prevention work will be more efficient. With the consideration of disaster prevention requirements to the public, this study develops a mobile application software through iOS system. With the combination of 10-min updating-frequency rainfall data from Central Weather Bureau (CWB) and the debris flow warning data from Soil and Water Conservation Bureau (SWCB), the system utilizes Arc GIS Runtime SDK for code writing. The general public can receive instant information including mapping of potential debris flow torrents, locations of nearby evacuation shelters, climate conditions and debris flow alerts through this application system. Moreover, this application's positioning and navigation function can provide the users' paths to closest refuge in emergency.
