|Table of Contents|

Study on Landslide Hazard Zonation Based on GIS——Taking Wanzhou District of Chongqing City as an Example(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2010年第04期
Page:
409-415
Research Field:
水资源与环境
Publishing date:

Info

Title:
Study on Landslide Hazard Zonation Based on GIS——Taking Wanzhou District of Chongqing City as an Example
Author(s):
CHU Jing-long;  WANG Jin-sheng;  TENG Yan-guo;  WANG Xiao-na
(School of Water Sciences, Beijing Normal University, Beijing 100875, China)
Keywords:
landslide;  information content model;  hazard zonation;  administrative district;  GIS;  Chongqing City
PACS:
P642.22;P208
DOI:
-
Abstract:
In order to make up the uncertainty of impact factor and classification while studying landslide hazard zonation, based on previous research results, assessment criteria of landslide hazard in Wanzhou District of Chongqing City was documented according to the relationship between the number of happened landslide hazard in the research area and the impact factors, such as slope geometry, lithology, geological structure, river erosion, land use type, human engineering activity, precipitation condition, and so on; based on GIS and information content model, information content of evaluation factor of landslide was calculated, landslide hazard zonation in Wanzhou District was divided; finally, landslide hazard zonation was subdivided according to the administrative district of villages and towns in Wanzhou District. The result showed that construction land, slope elevation(90-200 m), annual precipitation(1 024-1 060 mm)and Upper Shaximiao Formation of Middle Jurassic System were major factors to cause landslide; landslide hazard in Wanzhou District was divided into high, medium, low and very low dangerous zones according to the assessment criteria; landslide hazard zonation divided by the information model coincided with the fact result; the areas of high and medium dangerous zones were 564.4 km2 and 848.6 km2, and 16.3% and 24.5% of the total area of Wanzhou District, and the zones included arterial highway and relative centralized residential area which located at both sides of the Yangtze and its triburary; high and medium dangerous villages and towns included both sides of the Yangtze which were developed areas, especially Huangbai Village, Tailong Town, Tiancheng Town, Lihe Town and main zone of Wanzhou District.

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Last Update: 2010-12-20