基于遥感与D8算法的泥石流威胁对象信息提取与应急防治对策分析

INFORMATION EXTRACTION AND EMERGENCY PREVENTION ANALYSIS OF THREATENED OBJECTS OF DEBRIS FLOW BASED ON RS TECHNOLOGY AND D8 ALGORITHM

为丰富防灾减灾技术手段,达到主动防范地质灾害的目的,本文开展了基于遥感与D8算法的泥石流威胁对象的信息快速提取与应急防治对策研究。通过遥感与GIS技术手段提取、分析隐患区的地形地貌、土地利用现状、地层、构造等区域地质环境因子,基于最大坡降法——D8算法建模实现快速模拟泥石流流向以及汇水面积、出水口等信息,通过缓冲分析与叠加分析快速提取泥石流威胁对象。结合泥石流隐患现状分析认为区域泥石流存在复发可能,并提出地质灾害应急防治措施。研究表明通过遥感与D8算法能高效开展泥石流地质灾害防治,为应急处置提供技术支撑。

In this paper, RS technology and D8 algorithm based on the debris flow threat object information rapid extraction and emergency prevention and control analysis, in order to enrich the disaster prevention and mitigation technology, to achieve the purpose of active prevention of geological disasters. Using RS and GIS technology to extract and analyze regional geological environment factors such as topography, land use status, stratum and structure in the hidden danger area. Based on the maximum gradient method-d8 algorithm, the flow direction, catchment area, outlet and other information of debris flow can be quickly simulated. Fast extraction of debris flow threat objects by buffer analysis and overlay analysis. According to the analysis of the current situation of debris flow hidden dangers, it is considered that there is a possibility of recurrence of regional debris flow, and the emergency prevention and control measures of geological disasters are put forward. The research shows that RS technology and D8 algorithm can effectively carry out the prevention and control of debris flow geological disasters and provide technical support for the emergency disposal of geological disasters.