无人机倾斜摄影在泥石流灾害识别分析中的应用——以北京房山区史家营曹家坊泥石流为例  

The application of UAV oblique photography in debris flow disaster identification and analysis:Taking the debris flow in Caojiafang,Shijiaying,Fangshan District,Beijing as an Example

作　　者：闫驰 焦润成[1] 曹颖[1] 南赟[1] 王晟宇[1] 郭学飞 YAN Chi;JIAO Runcheng;CAO Ying;NAN Yun;WANG Shengyu;GUO Xuefei(Beijing Institute of Geology, Beijing 100120, China)

机构地区：[1]北京市地质研究所,北京100120

出　　处：《国土资源遥感》2020年第4期251-257,共7页Remote Sensing for Land & Resources

基　　金：北京市突发地质灾害监测预警系统(一期)工程运行(编号:PXM2017_158204_000002);“北京市重要泥石流沟航空摄影测量”(编号:ZHYG20170401)共同资助。

摘　　要：传统泥石流遥感调查方法主要是正射航空摄影,其获取数据精度和维度存在局限性,无人机倾斜摄影技术可同时从垂直、倾斜等不同的角度采集影像,获取地面物体更为完整准确的信息,建立的三维模型更直观,可为地质灾害调查提供新的技术手段。以史家营曹家坊泥石流沟为例,开展了基于无人机倾斜摄影测量的泥石流灾害特征识别分析。通过倾斜摄影可以获取泥石流沟高精度三维模型和纹理细节,真实反映实际地表顶面及侧面高分辨率信息,较准确获取泥石流物源分布情况及物源方量的估算,数据可用于泥石流一次最大冲出量的计算。该方法能够对泥石流地质灾害调查、现状评估提供更有力的数据支撑,充分发挥遥感技术在泥石流灾害调查、评价中的效能。The traditional remote sensing survey method of debris flow is mainly orthophoto aerial photography,which has limitations in the accuracy and dimension of data acquisition.UAV tilt photography technology can simultaneously acquire images from different angles,such as vertical and tilt,obtain more complete and accurate information of ground objects,establish more intuitive three-dimensional model,and provide new technical means for geological disaster investigation.Taking the Caojiafang debris flow gully in Shijiaying as an example,the authors carried out the feature recognition analysis of debris flow disaster based on UAV tilt photogrammetry.It is believed that the high-precision three-dimensional model and texture details of debris flow gully can be obtained by incline photography,which can truly reflect the high-resolution information of the top and side of the real surface,and accurately obtain the distribution of debris flow material source and the estimation of material source volume;the data can be used to calculate the maximum amount of debris flow once washed out.This method can provide a more powerful means for the investigation of debris flow geological disasters and the assessment of current situation.The remote sensing technology can be fully used in the investigation and evaluation of debris flow disaster.

关 键 词：倾斜摄影 泥石流 三维模型 遥感识别及分析 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]