Characterization and Risk Assessment of Drought Hazards in Guangdong Province, China

Authors: YONGQIN CHEN*, The Chinese University of Hong Kong, Dong HUA, Bureau of Hydrology, Ministry of Water Resources, Beijing, China
Topics: Water Resources and Hydrology, Hazards and Vulnerability, Hazards, Risks, and Disasters
Keywords: : drought hazards, risk assessment, water resources vulnerability, China
Session Type: Paper
Day: 4/10/2018
Start / End Time: 2:40 PM / 4:20 PM
Room: Napoleon B1, Sheraton 3rd Floor
Presentation File: No File Uploaded

Droughts are complicated phenomena caused by combined effects of meteorological, hydrological and socioeconomic factors. It is of great significance to characterize and assess drought hazards from physical dimension as a natural hazard and from socioeconomic dimension as a response. In this study we developed a joint assessment system to assess the risk of drought hazards from physical dimension (i.e. duration, severity, occurrence frequency and spatial patterns) and socioeconomic dimension (i.e. water resources vulnerability, exposure, sensitivity, and adaptability). For the physical dimension, we characterized the changing properties of droughts in both time and space in Guangdong province. Univariate and bivariate frequency analysis of drought duration and severity using Copulas were conducted to investigate the spatial distribution of droughts based on the joint probability distribution in the province. The quartiles descriptive statistical approach and spatial interpolation were used to map the spatial frequency distribution for the marginal distribution and joint occurrence probability of drought duration and severity. Cluster analysis was employed to characterize the spatial pattern. For the socioeconomic dimension, water resources vulnerability was quantified, a drought vulnerability assessment index was developed and a drought vulnerability map of Guangdong was produced based on the typical regional drought vulnerability indicators, mainly based on indicators of water resources demand and supply, land use, population, GDP etc. Finally, we combined the physical characteristics of droughts with the water resources vulnerability index for assessing the risk of drought hazards to provide scientific support for drought mitigation and adaptation in Guangdong province, China.

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