Failures of Ecological Engineering Following Typhoon Mindulle in Taiwan
There were 990 erosion and deposition events attributed to Typhoon Mindulle that brought extremely strong storms and induced heavy rains in June 2004. The rains caused 12 deaths and 9 injuries as a result of debris flows, landslides and rockfalls. Field investigations of the damage to facilities and the applicability of ecological engineering in slopeland and debris flow hazards mitigation were conducted. Some common concerns attributed - to these damage events are buildings located at the river confluent, an immediate neighbor riverside, insufficient facilities for debris collection, and weak stone revetments at stream concave banks, n addition, the designed bridge piers were not able to avoid the impact and scouring by debris masses. Impact on the main channel by mass wasting of a tributary stream and encroachment of the riverbank is another important factor besides heavy rainfall. It is important to improve the study of ecological engineering for debris flow mitigation including the effective design of revetment protection at the concave banks of channels. Treatment technology for rain water and runoff, as well as ecological and traditional engineering used for hazard mitigations, needs to be enhanced. It is necessary to consider the effects of debris flows during route planning to avoid failure. Methods to strengthen the application of ecological engineering are also suggested.
landslides debris flow ecological engineering hazard mitigations
Chien-Yuan Chen Ho-Wen Chen
Department of Civil and Water Resources Engineering National Chiayi University, Chiayi City, Taiwan, Department of Environmental Science and Engineering Tunghai University, Taichung City, Taiwan, R.O.C
国际会议
三峡
英文
756-759
2012-05-18（万方平台首次上网日期，不代表论文的发表时间）