Skyline是当前世界上应用较为广泛的三维G IS软件之一,它能够快速地融合数据、更新数据库,展现3D地理空间影像,其功能十分强大。通过利用Skyline提供的3D控件功能,对云南蒋家沟泥石流区域进行真实建模,在模拟计算结果的基础上进行了可视化危险性分区;运用3D G IS技术处理与分析多元地理信息数据,为用户提供了良好的界面和简单实用的操作平台。初步实现3D G IS系统在泥石流危险性分区系统中的应用。
Debris flow is a kind of geological hazard occurring in mountain areas.Its velocity is very important for debris flow dynamics research and designing debris flow control works.However,most of past researches focused on surface velocity and mean velocity of debris flow,while few researches involve its internal velocity because there is no available method for measuring the internal velocity for its destructive power.In this paper,a method of temporally correlated shear forces（TCSF） for meas-uring the internal velocity of debris flows is proposed.The principle of this method is to calculate the internal velocity of a debris flow using the distance between two detecting sections and the time differ-ence between the two waveforms of shear forces measured at both sections.This measuring method has been tested in 14 lab-based flume experiments.
