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GIS based Seismic Stability Zonation of Slope around Lanzhou City
Wang Ya-qiang, Zhang Xiao-ye
State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, CAS, Xian 710075, China;
Wang Lan-min
Lanzhou Institute of Seismology, China Seismological Bureau, Lanzhou 730000, China)
Abstract
Using a pseudo-static analysis method of slope instability proposed by Koppula, combining with GIS technology, the slope stability during earthquake around Lanzhou City under three probability of exceedance (2%, 10% and 63.5% probability of exceedance in 50 years) is forecasted. And the slope stabililty zonation maps during earthquake are accomplished. The slopes been located south of Xigu and Qilihe Zone in Lanzhou have the highest landslide susceptibility and should be defended preferentially.
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