中国地理科学 ›› 2014, Vol. 0 ›› Issue (3): 328-338.doi: 10.1007/s11769-014-0663-8

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Extraction and Analysis of Gully Head of Loess Plateau in China Based on Digital Elevation Model

ZHU Hongchun1,2, TANG Guoan2, QIAN Kejian2, LIU Haiying3   

  1. 1. Geomatics College, Shandong University of Science and Technology, Qingdao 266590, China;
    2. Key Laboratory of Virtual Geographic Environment of Ministry of Education, Nanjing Normal University, Nanjing 210046, China;
    3. College of Information Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China
  • 收稿日期:2012-12-21 修回日期:2013-02-28 出版日期:2014-03-27 发布日期:2014-04-30
  • 通讯作者: ZHU Hongchun. E-mail: sdny_xa@163.com E-mail:sdny_xa@163.com
  • 基金资助:

    Under the auspices of National Youth Science Foundation of China (No. 41001294), Key Project of National Natural Science Foundation of China (No. 40930531), Research Fund of State Key Laboratory Resources and Environment Information System (No. 2010KF0002SA)

Extraction and Analysis of Gully Head of Loess Plateau in China Based on Digital Elevation Model

ZHU Hongchun1,2, TANG Guoan2, QIAN Kejian2, LIU Haiying3   

  1. 1. Geomatics College, Shandong University of Science and Technology, Qingdao 266590, China;
    2. Key Laboratory of Virtual Geographic Environment of Ministry of Education, Nanjing Normal University, Nanjing 210046, China;
    3. College of Information Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China
  • Received:2012-12-21 Revised:2013-02-28 Online:2014-03-27 Published:2014-04-30
  • Contact: ZHU Hongchun. E-mail: sdny_xa@163.com E-mail:sdny_xa@163.com
  • Supported by:

    Under the auspices of National Youth Science Foundation of China (No. 41001294), Key Project of National Natural Science Foundation of China (No. 40930531), Research Fund of State Key Laboratory Resources and Environment Information System (No. 2010KF0002SA)

摘要:

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.

关键词: Loess Plateau, loess gully head, Digital Elevation Model (DEM), loess landform evolution, feature extraction, statistical analysis

Abstract:

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.

Key words: Loess Plateau, loess gully head, Digital Elevation Model (DEM), loess landform evolution, feature extraction, statistical analysis