Assessment of Agricultural Drought Risk in Southern China in 2013 -A Case Study in Hengyang City, Hu'nan Province

LIU Lanfang; XIAO Zhicheng; CHEN Tao; ZHOU Songxiu

doi:10.13961/j.cnki.stbctb.2015.02.052

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Assessment of Agricultural Drought Risk in Southern China in 2013 -A Case Study in Hengyang City, Hu'nan Province

- Assessment of Agricultural Drought Risk in Southern China in 2013 -A Case Study in Hengyang City, Hu'nan Province
- Bulletin of Soiland Water Conservation Vol. 35, Issue 2, Pages: 274-278(2015)
- 作者机构：
  
  1. 衡阳师范学院资源环境与旅游管理系,湖南,衡阳,421008
  2. 湖南衡阳市气象局,湖南,衡阳,421001
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2015.02.052
  CLC：
- Published：2015
- 稿件说明：
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LIU Lanfang, XIAO Zhicheng, CHEN Tao, et al. Assessment of Agricultural Drought Risk in Southern China in 2013 -A Case Study in Hengyang City, Hu'nan Province[J]. Bulletin of Soiland Water Conservation, 2015, 35(2): 274-278.
DOI：

LIU Lanfang, XIAO Zhicheng, CHEN Tao, et al. Assessment of Agricultural Drought Risk in Southern China in 2013 -A Case Study in Hengyang City, Hu'nan Province[J]. Bulletin of Soiland Water Conservation, 2015, 35(2): 274-278. DOI： 10.13961/j.cnki.stbctb.2015.02.052.

摘要

[目的] 对南方典型区域的旱灾风险进行评估

为南方防旱减灾决策提供依据。[方法] 运用降水标准化指数法(SPI)对2013年湖南省衡阳市干旱危险性进行评价

构建评估指标体系

借助数学模型评估旱灾脆弱性。[结果] 衡阳县、祁东县为特旱

衡东县、衡南县、常宁市、耒阳市属于重旱区

衡山县为中旱区。选择降水量、水利化程度等8个指标体系

并构建数学模型计算衡阳市7个县域水田系统旱灾脆弱度。水田系统旱灾脆弱度以衡南县最大

为0.627

耒阳市最小

为0.429;衡阳县、衡南县、祁东县、常宁市为高度脆弱区

衡山县、衡东县、耒阳市是低度脆弱区。[结论] 综合干旱危险性与水田系统脆弱性来看

衡阳市西部农业旱灾风险高于东部农业旱灾风险。

Abstract

[Objective] The prior work of drought risk assessment taken Hengyang City as a typical region in Southern China was conducted to guide the consequent drought-control decision-making.[Methods] The standardized precipitation index was used to assess the drought risk in Hengyang City of Hu'nan Province in 2013. The mathematical model is built to calculate the drought vulnerability in the city by selecting indicator system.[Results] The drought risk of Hengyang City was sub-zoned as followings:extreme drought subzone includes Hengyang and Qidong Counties; severe drought subzone includes Hengdong

Hengnan

Changning and Leiyang Counties

and Hengshan County is in the moderate drought subzone. After that

eight indicators as precipitation

the degree of irrigation

and etc. were used to calculate the drought vulnerability of the paddy filed system in seven counties of Hengyang City with a mathematical method. The drought vulnerability of the paddy filed system in Hengnan County has the maximum valueas(0.627)

Leiyang County has the minimum value(0.429). The counties of Hengyang

Hengnan

Changning and Qidong are highly vulnerable areas and the counties of Hengshan

Hengdong and Leiyang belong to low vulnerable areas.[Conclusion]The western counties of Hengyang City may potentially undergo more frequent and greater drought risk than the western counties when both drought risk and the vulnerability of the paddy filed system were considered.

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references

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