期刊文献+
共找到3篇文章
< 1 >
每页显示 20 50 100
Extraction and Analysis of Gully Head of Loess Plateau in China Based on Digital Elevation Model 被引量:18
1
作者 ZHU Hongchun TANG Guoan +1 位作者 QIAN Kejian LIU Haiying 《Chinese Geographical Science》 SCIE CSCD 2014年第3期328-338,共11页
In China′s Loess Plateau area, gully head is the most active zone of a drainage system in gully areas. The differentiation of loess gully head follows geospatial patterns and reflects the process of the loess landfor... In China′s Loess Plateau area, gully head is the most active zone of a drainage system in gully areas. The differentiation of loess gully head follows geospatial patterns and reflects the process of the loess landform development and evolution of its drainage system to some extent. In this study, the geomorphic meaning, basic characteristics, morphological structure and the basic types of loess gully heads were systematically analysed. Then, the loess gully head′s conceptual model was established, and an extraction method based on Digital Elevation Model(DEM) for loess gully head features and elements was proposed. Through analysing the achieved statistics of loess gully head features, loess gully heads have apparently similar and different characteristics depending on the different loess landforms where they are found. The loess head characteristics reflect their growth period and evolution tendency to a certain degree, and they indirectly represent evolutionary mechanisms. In addition, the loess gully developmental stages and the evolutionary processes can be deduced by using loess gully head characteristics. This study is of great significance for development and improvement of the theoretical system for describing loess gully landforms. 展开更多
关键词 Loess Plateau loess gully head Digital Elevation Model (DEM) loess landform evolution feature extraction STATISTICALANALYSIS
下载PDF
Abnormal Earthquake Intensity Areas and Formation Mechanism of the Minxian-Zhangxian M_S6.6 Earthquake on July 22,2013,Gansu
2
作者 Chen Zhengwei Tudentsni Yan Xiaobin 《Earthquake Research in China》 CSCD 2016年第2期208-214,共7页
On July 22, 2013, the Minxian-Zhangxian Ms6. 6 earthquake occurred on the east segment of Lintan-Dangchang fault. The analysis of digital elevation and remote sensing imaging shows that the east segment of Lintan-Dang... On July 22, 2013, the Minxian-Zhangxian Ms6. 6 earthquake occurred on the east segment of Lintan-Dangchang fault. The analysis of digital elevation and remote sensing imaging shows that the east segment of Lintan-Dangchang fault is still active and the main thrust feature of the fault switches to left lateral slip. With the field research of intensity and damage, several abnormal areas of degree VIII spread in the isoseismal line of degree VII and some abnormal areas of degree VII spread in the isoseismal line of degree VI. These abnormal areas are distributed along the hanging wall of the fault in a width of 2km. The analysis based on the remote sensing and digital elevation model shows that the segment of the Lintan-Dangchang fault south of Minxian mainly slips in left literal. The fault movement made the soil soft in the fault zone. The earthquake motion propagated along the fault zone. Therefore the strong earthquake motion caused foundation failure in the soft soil along the fault zone and the abnormal intense areas of disaster formed. 展开更多
关键词 Minxian-Zhangxian Ms6. 6 earthquake Lintan-Dangchang faultEarthquake intensity Disaster
下载PDF
证据理论融合多视角遥感信息的地热异常探测 被引量:1
3
作者 郝明 高彦彦 +2 位作者 王青 何鹏 张华 《地球科学》 EI CAS CSCD 北大核心 2024年第1期347-358,共12页
针对传统遥感地热探测方法存在虚假异常多、效率低等问题,提出一种证据理论融合多视角遥感信息的地热异常探测方法.基于遥感数据反演的温度信息,分别从全局、局部分块和高程分区等多视角提取温度异常.采用Dempster/Shafer证据理论方法... 针对传统遥感地热探测方法存在虚假异常多、效率低等问题,提出一种证据理论融合多视角遥感信息的地热异常探测方法.基于遥感数据反演的温度信息,分别从全局、局部分块和高程分区等多视角提取温度异常.采用Dempster/Shafer证据理论方法融合上述热异常证据,实现多视角温度异常探测.最后,根据断裂构造建立缓冲区,通过分析缓冲区内及附近的热异常圈定地热范围.以山东省青岛市为例,基于Landsat-8卫星影像利用提出方法探测地热,72.7%的温度异常分布在断裂构造的1 km缓冲区内;圈定的11处地热异常,其中3处为青岛市已全部探明的地热田或地热井,验证了方法的可靠性.与传统遥感地热异常探测方法相比,提出的方法通过融合全局、局部和高程信息,消除了大量虚假异常,提高结果的精度和可靠性. 展开更多
关键词 地热异常 局部分块 高程分区 断裂构造 D-S证据理论融合 测绘学
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部