Risk Zonation of Cold Disaster Based on GIS: A Case Study of Anhui Province
Received date: 2011-01-08
Request revised date: 2011-04-02
Online published: 2012-03-25
Copyright
Using the meteorological, geographical, agricultural and socio-economical data, the four indexes, including the danger of disaster-causing factors, the sensitivity of disaster-formative environments, the vulnerability of disaster-bearing body and the capability of disaster prevention, were presented and used to analyze the regional difference of cold disaster in Anhui Province based on the natural disaster risk theory. Furthermore, a comprehensive risk index model of cold disaster was constructed to zone the risk of cold disaster in Anhui Province using the above four disaster risk indexes and GIS. Finally, the zonation results were validated by the historical disaster data. The results showed that the cold disaster risk assessment model of Anhui Province was reasonable and objective, and its assessment results were relatively suitable for the fact of clod disaster risk in Anhui Province. Particularly, the high risk zones of cold disaster were mainly located in the northern areas of Anhui Province and the some mountainous areas, and the low risk of cold disaster zones were mainly located near water and cities areas in Anhui Province. Comparing with the historical disaster data, the zonation of cold disaster results were in accordance with the actual distributions. This work provided convincing evidences to assess, prevent and reduce natural cold disaster.
Key words: cold disaster; risk theory of natural disaster; GIS; risk zonation; Anhui Province
TANG Wei-an , TIAN Hong , YANG Yuan-jian , LU Yan-yu , XU Guang-qing , WEN Hua-yang , WANG Sheng . Risk Zonation of Cold Disaster Based on GIS: A Case Study of Anhui Province[J]. SCIENTIA GEOGRAPHICA SINICA, 2012 , 32(3) : 356 -361 . DOI: 10.13249/j.cnki.sgs.2012.03.356
Fig.1 Sketch map of Anhui Province图1 安徽省行政区划 |
Table 1 Sensitivity of different land-use responses to low temperature表1 不同土地利用类型对低温敏感程度赋值表 |
类型 | 耕地 | 草地 | 林地 | 水体 | 城市用地 |
---|---|---|---|---|---|
赋值 | 0.940 | 0.850 | 0.750 | 0.550 | 0.500 |
Fig.2 Risk zonation of freezing (a), late spring chilly (b), summer chilly (c) and wind of cold dew (d)图2 冻害(a)、倒春寒(b)、小满寒(c)及秋分寒(d)风险区划 |
Fig.3 Risk zone of low-temperature disaster图3 低温冷冻灾害综合区划 |
The authors have declared that no competing interests exist.
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