tailieunhanh - Báo cáo " Pattern and determinant agents of the debris and mud flash flood in Lay Nua Commune area, the Former Muong Lay District, Dien Bien Province "

This paper discusses debris and mud flash flood, which is a widespread phenomenon with different levels of damaging effects and repetition in the mountainous areas of Vietnam. There are some sites where the flash flood with severe debris components has recurred many times and it has always caused heavy loss of human and materials, such as Lay Nua Commune, the Former | VNU Journal of Science Earth Sciences 23 2007 203-212 Pattern and determinant agents of the debris and mud flash flood in Lay Nua Commune area the Former Muong Lay District Dien Bien Province Dao Dinh Bac1 Tran Thanh Ha2 1 College of Science VNU 2 Institute of Vietnamese Studies and Development Sciences VNU Received 20 October 2007 received in revised form 03 December 2007 Abstract. This paper discusses debris and mud flash flood which is a widespread phenomenon with different levels of damaging effects and repetition in the mountainous areas of Vietnam. There are some sites where the flash flood with severe debris components has recurred many times and it has always caused heavy loss of human and materials such as Lay Nua Commune the Former Muong Lay District Dien Bien Province. During the 1990s this kind of severe hazard is recorded to occur every two years in the town of Former Muong Lay District. This leads to the government s decision to relocate the town to another place. Some characteristics of physiographical conditions such as climate relief lithologic and tectonic features which are considered relevant to debris and mudflows activities are analyzed and then come to the conclusions on determinant agents of debris and mud flash flood in this area. Keywords Muong Lay Landslide Mud flow Debris flow Mud flash flood. 1. Introduction Debris and mud flash flood is a specific form of the flash flood which presents a very dangerous hazard for the mountainous inhabitants. Finding out its appearance mechanism and determinant factors allows us to make an appropriate warning of the risks that can occur in specific areas. This phenomenon is rather widespread in mountain regions of Vietnam but its damaging effect level and repetition appears very different. There are some sites where the flash Corresponding author. Tel. 84-4-8581420 E-mail geography@ flood with severe debris components has recurred many times and always causing heavy human and material losses

• Báo cáo khoa học
• determinant agents
• debris
• earth sciences
• Research
• scientific research
• scientific reports