基于雷达和光学遥感数据地震堰塞湖 监测方法研究

由于地震形成的堰塞湖是一种严重的次生灾害,利用遥感对堰塞湖的动态范围进行监测已成为一种重要的手段。基于堰塞湖在光学遥感图像和雷达图像上的分布特征,为满足全天候实时监测的要求,本文建立了光学遥感数据和雷达微波数据进行堰塞湖监测的技术流程,阐述了从原始数据获取到堰塞湖面积范围确定的步骤。最后分别以光学遥感数据和微波遥感数据为例,对“5. 12"汉川地震发生后形成的唐家山堰塞湖的动态范围信息进行了提取。

Study on the monitoring method of landslide dam formed by earthquake based on optical and radar remote sensing data

As landslide dam is a serious secondary disaster after earthquake.The remote sensing is an important method to monitor the dynamic range of the landslide dam.Based on the distribution feature of the landslide dam in optical and radar remote sensing images,the technical procedure of the monitoring on the landslide dam with the radar and optical sensing data is analyzed herein,so as to meet the requirement of the all-weather real-time monitoring on landslide dam,and then,the determination steps to obtain the area range of landslide is expounded as well.The information of the dynamic range of Tangjiashan Landslide Dam formed during "5.12" Earthquake is finally extracted by taking both the optical remote sensing data and the data from the microwave remote sensing as the study cases concerned.