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Frontiers of Earth Science

Front. Earth Sci.    2015, Vol. 9 Issue (2) : 300-307     DOI: 10.1007/s11707-014-0453-8
Discussion on evaluating the vulnerability of storm surge hazard bearing bodies in the coastal areas of Wenzhou
Yuexia ZHANG1,2,*(),Jing GUO2,Zhumei CHE2
1. College of Environmental Science and Engineering, Ocean University of China, Qingdao 266000, China
2. Marine Monitoring and Forecasting Center of Zhejiang, Hangzhou 310007, China
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Wenzhou is a region on the coast of China where storm surges are frequent and serious. Starting with society, economy, land utilization, and anti-disaster capability, the vulnerability of each county in the coastal region of Wenzhou was evaluated. The counties were then divided into mild, moderate, heavy, and extremely heavy fragile areas by choosing 15 factors to establish an evaluation index system, using principal component analysis to set the weight of each factor. The results show that all of the counties fit into the categories of heavy and extremely heavy fragile areas except for Pingyang county, which is mild. There is no significant difference in storm surge vulnerability among all counties in the Wenzhou coastal region, which is highly associated with the general balance of socioeconomic development in the Zhejiang coastal region and the orientation of government policies. This research provides a method for evaluating vulnerability to storm surge. Evaluation results can provide the basis for responses to storm surge, contributing to disaster prevention and mitigation planning, and regional sustainable development planning.

Keywords storm surge disaster      index system      hazard bearing body      vulnerability     
Corresponding Authors: Yuexia ZHANG   
Just Accepted Date: 29 October 2014   Online First Date: 02 February 2015    Issue Date: 30 April 2015
 Cite this article:   
Yuexia ZHANG,Jing GUO,Zhumei CHE. Discussion on evaluating the vulnerability of storm surge hazard bearing bodies in the coastal areas of Wenzhou[J]. Front. Earth Sci., 2015, 9(2): 300-307.
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Yuexia ZHANG
Jing GUO
Zhumei CHE
Type Index factor Description of the factor
Society Population density Divide regional population by land area
The proportion of young and old population Divide the population younger than 10 and over the age of 65 by total population
Urbanization level Divide urban population by total population
Educational level Illiteracy rates over the age of 15
Economy Per capita GDP Divide GDP by total population
Per capita industrial output Divide industrial output by total population
Per capita gross output value of farming, forestry, animal husbandry, and fishery Divide gross output value of farming, forestry, animal husbandry, and fishery by total population
Land use Residential land area Regional residential land area
Public facilities area Public facilities area
Sown area of crops Sown area of crops
Mariculture area Mariculture area
Scale of the port Volume of freight handled in major ports
Resilience Proportion of the length of causeway and coastline Divide the length of causeway by the length of coastline
Proportion of labor population Divide labor population by total population (age from 15 to 59)
General budget revenue Regional finance general budget revenue
Tab.1  The vulnerability assessment index system of storm surge hazard bearing bodies in Wenzhou
Component Initial eigenvalues Extraction sums of squared loadings
Total Variance/% Cumulative/ % Total Variance/% Cumulative/%
1 8.861 59.074 59.074 8.861 59.074 59.074
2 2.562 17.078 76.152 2.562 17.078 76.152
3 1.942 12.946 89.098 1.942 12.946 89.098
4 0.953 6.355 95.454
5 0.682 4.546 100.000
6 0.000 0.000 100.000
7 0.000 0.000 100.000
8 0.000 0.000 100.000
9 0.000 0.000 100.000
10 0.000 0.000 100.000
11 0.000 0.000 100.000
12 0.000 0.000 100.000
13 0.000 0.000 100.000
14 0.000 0.000 100.000
15 0.000 0.000 100.000
Tab.2  Total variance explained
Index factor Weight coefficient
Population density 0.065
Proportion of young and old population 0.061
Urbanization level 0.071
Educational level 0.048
Per capita GDP 0.070
Per capita industrial output 0.072
Per capita gross output value of farming, forestry, animal husbandry and fishery 0.075
Residential land area 0.062
Public facilities area 0.068
Sown area of crops 0.072
Mariculture area 0.066
The scale of the port 0.067
The proportion of the length of causeway and coastline 0.059
The proportion of labor population 0.072
General budget revenue 0.071
Tab.3  The weights of evaluation indexes
Fig.1  The vulnerability indexes of society (a), economy (b), land use (c), and resilience (d) in Wenzhou
Fig.2  The vulnerability level of storm surge disaster hazard bearing bodies in Wenzhou
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