摘要
本文以马吉水电站地质环境调查为例,叙述了遥感信息在区域地质环境调查中应用的流程和方法。以TM卫星影像和假彩色航片为信息源,对遥感信息处理过程和解译方法进行了针对性的研究。文中首先对TM影像进行波段选择、几何精校正等处理,以达到良好的目视解译效果,进而建立构造、滑坡和泥石流的解译标志,以此为依据对工程区进行了判读,最后对结果进行野外重点地区验证。验证表明断裂构造的解译准确率达到90%,滑坡的解译准确率达到95%,泥石流的解译准确率达到100%。特别是通过遥感影像解译出来的与1:25万区域地质图略有不同的贡山-马吉断裂,以及地质图上没有显示的北东向、近东西向断裂,在野外考察中均得到了实地验证。与常规地质调查方法相比,利用遥感数据能更加快速而准确地对区域地质环境进行解译。
This paper described the application of remote sensing information in the geological environmental interpretation for Maji hydro. TM satellite and aerial images were selected as data source. Both the image processing and the interpretation methods were carefully studied. After image processing, such as band combination and precision geometric correction, the image could get a good result for interpretation. The interpretation signs of fault structures, landslides and debris flow were established according to the resultant images. The results of field validation showed that its accuracy could reach 90%. Especially from the interpretation, it found that the Gongshan-Maji fault was different from that in the 1/250000 regional geology chart, and this question was proved by the field investigation finally. Besides, the fault striking towards northeast and east-west was not included in the regional geological map. Compared with the conventional geological surveying, this way should be more accurate and effective for regional geological environmental interpretation.
出处
《工程勘察》
CSCD
北大核心
2007年第7期53-57,共5页
Geotechnical Investigation & Surveying
关键词
区域地质环境
遥感信息
断裂构造
环形构造
滑坡
泥石流
regional geological environment
remote sensing information
fault structure
ring-shaped structure
landslide
debris flow
