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

Issue:

2022年第04期

Page:

605-616

Research Field:

工程地质与环境灾害

Publishing date:

Info

Title:

Temporal Characteristics of Landslides and Rainfall in Hong Kong, China from 2001 to 2016

Author(s):

XIONG Cheng¹; 2;  LI Qing-lan^1*;  LEI Cheng-bin²;  SUN Li-qun¹;  RUAN Jian-jun³

(1. Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, Guangdong, China; 2. Shenzhen Natural Resources and Real Estate Evaluation and Development Research Center(Shenzhen Geo-environment Monitoring Center), Shenzhen 518040, Guangdong, China; 3. Shenzhen Geology Bureau, Shenzhen 518023, Guangdong, China)

Keywords:

landslide;  rainfall;  temporal characteristic;  regression analysis;  correlation;  effective degree of freedom;  critical correlation coefficient;  Hong Kong

PACS:

P642.22

DOI:

10.19814/j.jese.2021.10025

Abstract:

With the acceleration of urban construction, the impact of urban landslide disasters on the safety and property of residents has become increasingly prominent. Statistics show that landslides caused by rainfall account for more than 90% of the total landslides. The research on the qualitative and quantitative relationships between rainfall and landslide is of great significance to urban safety and urban disaster prevention and mitigation. Based on daily landslides data from 2001 to 2016 in the annual landslide report published by the Civil Engineering and Development Department of Hong Kong, the spatial landslides data from the Enhanced Natural Terrain Landslide Inventory and the daily rainfall observation data from Hong Kong Observatory, the quantitative and qualitative relationships between landslides and rainfall in Hong Kong were analyzed. The results show that the daily, monthly and annual landslides are significantly correlated with daily, monthly and annual rainfall, and the correlation coefficients are 0.406, 0.715 and 0.640, respectively; the occurrence of daily landslide is not only affected by the rainfall of the same day, but also by the accumulated rainfall of the previous 13 days; the daily landslides is significantly influenced by the rainfall on the same day and the previous four days; the rainfall on the same day and the previous one day has the greatest impact on the daily landslide; on average, the impact of the rainfall on the current day is 1.2 times the impact of rainfall of the day before; when the daily rainfall exceeds 200 mm(extremely heavy rain), the probability of mass landslides reaches 87.5%; the month with the highest probability of rainfall and landslide in Hong Kong is June, and landslide disasters are more serious from June to August than those in other months in Hong Kong. This research can provide valuable references for disaster prevention and mitigation, and municipal construction planning in Guangdong-Hong Kong-Macao Greater Bay Area.

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Memo

Memo:

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Common functions

Last Update: 2022-07-30