Journal of Geo-information Science, Volume. 22, Issue 3, 338(2020)

Uncertainty of the Morphological Feature Expression of Loess Erosional Gully Affected by DEM Resolution

Sijin LI1...1,2,2,3,3, Wen DAI1,1,2,2,3,3, Liyang XIONG1,1,2,2,3,3,*, and Guoan TANG1,1,2,2,33 |Show fewer author(s)
Author Affiliations
  • 1Key Laboratory of Virtual Geographic Environment (Nanjing Normal University), Ministry of Education, Nanjing 210023, China
  • 1虚拟地理环境教育部重点实验室(南京师范大学),南京 210023
  • 2School of Geography, Nanjing Normal University, Nanjing 210023, China
  • 2南京师范大学地理科学学院,南京 210023
  • 3Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing 210023, China
  • 3江苏省地理信息资源开发与利用协同创新中心,南京 210023
  • show less
    Figures & Tables(8)
    Workflow of uncertainty of the morphological feature expression of loess erosional gully
    Sketch map of illumination model
    Location of the study areas and digital elevation model data
    The results of gully indicators and the relationships between gully channel indicators and DEM resolutions
    The influence of DEM resolution on gully cutting depth
    The results of gully head indicators and the relationships between gully head indicators and DEM resolutions
    • Table 1. The appropriate threshold value for gully network extraction of sample areas (m)

      View table
      View in Article

      Table 1. The appropriate threshold value for gully network extraction of sample areas (m)

      样区
      12345678910
      麻地沟35020010080706050404040
      安塞35020015012010010080706050
      桥沟35015010080807060505050
    • Table 2. Basic information and features of study areas

      View table
      View in Article

      Table 2. Basic information and features of study areas

      样区位置面积/km2海拔/m侵蚀沟特点
      安塞37°14'24"N—37°14'27"N,109°14'41"E—109°14'53"E0.501163.7~1416.5主沟道呈东西走向,南面浅沟和切沟发育多,北面下切侵蚀强烈,发育3条较大的切沟,较少发育浅沟
      麻地沟37°28'59"N—37°28'49"N,108°48'2"E—108°48'35"E0.231396.8~1556.8主沟道呈南北走向,浅沟和切沟发育较多
      桥沟37°34'10"N—37°34'16"N,104°16'49"E—104°16'57"E0.13900.9~1017.1主沟道呈西南—东北走向,两侧发育有较多浅沟和切沟
    Tools

    Get Citation

    Copy Citation Text

    Sijin LI, Wen DAI, Liyang XIONG, Guoan TANG. Uncertainty of the Morphological Feature Expression of Loess Erosional Gully Affected by DEM Resolution[J]. Journal of Geo-information Science, 2020, 22(3): 338

    Download Citation

    EndNote(RIS)BibTexPlain Text
    Save article for my favorites
    Paper Information

    Received: Jul. 3, 2019

    Accepted: --

    Published Online: Sep. 16, 2020

    The Author Email: XIONG Liyang (xiongliyang@163.com)

    DOI:10.12082/dqxxkx.2020.190352

    Topics