RESEARCH ARTICLE


Mapping Submarine Landslide: A Case Study in Northern Continental Slope of the South China Sea



Tianyun Su1, *, Xishuang Li1, Jiagang Li2, Lejun Liu1
1 First Institute of Oceanography, SOA, Qingdao, 266061, China;
2 Research Center of China National Offshore Oil Corporation, Beijing, 100027, China


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© 2015 Su et al.;

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Correspondence: * Address correspondence to this author at the No.6 Xian Xialing Road, Qingdao, China. Postcard: 266061; Tel: +86 532 88967957; E-mail: tianyun.su@gmail.com


Abstract

Geographical Information Systems is a useful tool for marine geohazard mapping. This paper describes an integrated and systematic map-based approach for identification and characterization of submarine landslide with multidisciplinary data such as multibeam bathymetric data, multichannel seismic data, sidescan sonar and so on. Taking Liwan 3- 1 gas field in northern continental slope of Southern China Sea as a case study, a regional database is established to provide convenient services to manage search and extract the target data for geohazard mapping and identification. Bathymetric map and seismo-geomorphologic map are calculated and produced with GIS to establish an elementary understanding of geomorphologic features. With this integrated approach, dozens of landslides are identified in the study area and they are featured as small and multiple superimposed failure scars. Fundamental information of landslides can also be provided for further detail interpretation, quantification and assessment of their mechanism and potential risks.

Keywords: Geographic information system (GIS), morphometric map, multibeam bathymetry, submarine landslide, South China Sea.