Peng L.,Geology Environment Geology Survey Institute |
Ma X.,Geology Environment Geology Survey Institute |
Jin J.,Geology Environment Geology Survey Institute |
Tian H.,Geology Environment Geology Survey Institute |
And 2 more authors.
Journal of Natural Disasters | Year: 2014
After the 14 April 2010 Yushu earthquake, the earthquake caused mountain looseness, channel blockage, and a lot of landslides, avalanches, debris flows as well as other geological disasters. The spatial distribution of geological disasters is affected by topography, lithology and human engineering activities and other factors, but for geological disasters triggered by the earthquakes, its spatial distribution is mainly controlled by the seismogenic faults. This paper selects the geological disaster development concentrated zone of Batang River-Jiegu town to study. It is found that the Yushu earthquake fault has the following impact effects on the geological hazards: (1) distribution of the geological disaster development on two sides of the earthquake fault has some differences: strong earthquake geological disasters are developed within the range of 2500m on both sides of the fault zone, where the 500 m range is the most developed area. (2) Yushu earthquake triggered geological disasters occur mainly in districts of Intensity VII degrees, (3) the main slip direction of Yushu earthquake landslides and avalanches is NE-SW direction, which is approximately perpendicular to the strike of the seismgenic fault.