Vulnerability of Agricultural Drought and Agricultural Losses Reduction During Drought Through Implementation of Ecological Measures-A Case Study of Hengyang, Hu'nan Province

LIU Lan-fang; Guan Xin; TANG Yun-song

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Vulnerability of Agricultural Drought and Agricultural Losses Reduction During Drought Through Implementation of Ecological Measures-A Case Study of Hengyang, Hu'nan Province

- Vulnerability of Agricultural Drought and Agricultural Losses Reduction During Drought Through Implementation of Ecological Measures-A Case Study of Hengyang, Hu'nan Province
- Bulletin of Soiland Water Conservation Vol. 24, Issue 2, Pages: 69-73(2005)
- 作者机构：
  
  1. 湖南农业大学农学院,湖南,衡阳,421008
  2. 湖南农业大学资源与环境学,湖南,衡阳,421008
  3. 衡阳师范学院资源环境与旅游管理系,湖南,衡阳,421008
  4. 南京大学城市与资源系,江苏,南京,210093
- 作者简介：
- 基金信息：
- DOI：
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- Published：2005
- 稿件说明：
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LIU Lan-fang, Guan Xin, TANG Yun-song. Vulnerability of Agricultural Drought and Agricultural Losses Reduction During Drought Through Implementation of Ecological Measures-A Case Study of Hengyang, Hu'nan Province[J]. Bulletin of Soiland Water Conservation, 2005, 24(2): 69-73.
DOI：

LIU Lan-fang, Guan Xin, TANG Yun-song. Vulnerability of Agricultural Drought and Agricultural Losses Reduction During Drought Through Implementation of Ecological Measures-A Case Study of Hengyang, Hu'nan Province[J]. Bulletin of Soiland Water Conservation, 2005, 24(2): 69-73. DOI：

摘要

农业旱情是农业旱灾脆弱性和干旱风险性共同作用的结果。随着全球变暖

蒸发力增大

干旱的风险性变大

因此降低农业旱灾脆弱性是防旱抗旱的重要措施。灾害脆弱性可以看成是生态安全性的另一面

故加强生态安全建设可以降低农业旱灾脆弱性。衡阳市是湖南省重要的农业生产基地之一

也是农业旱情较重地区之一

而其农业旱情与农业旱灾脆弱性密切相关。这种脆弱性是生态环境因素和社会因素在一定的时空条件下偶合的产物。详细地分析了气候因素、植被和土壤等环境因素和水利设施、经济发展水平等社会因素在农业旱灾脆弱性形成中的作用。依据长时间序列的气象资料和经济统计数据

运用数学模型和有关优化分析方法

对衡阳市农业旱灾脆弱性进行定量评估。提出了降低农业旱灾脆弱性的生态措施。

Abstract

Drought can severely reduce agricultural productivity.Since the risk of drought is likely to intensify with projected global warming and increases in evaporation potential

it is critical to identify methods for minimizing the manifestat ion of drought condit ions and reducing agriculture's vulnerability to drought.The vulnerability of landbased product ion systems to natural disasters is a funct ion of the systems underlying ecological integrity. Therefore

ecological improvement and reconstruction may reduce agriculture?svulnerability to drought.Hengyang

an important agricultural area in China

experiences severe drought from time to time.This study demonst rates the close correlat ion between agricultural losses in the area during drought and certain environmental and social factors

under particular space-time considerations.Factors cont ributing to agricultural vulnerability

such as local weather conditions

vegetation and soil conditions

irrigation works and the level of economic development were analyzed in detail.The vulnerability of agriculture to drought in the area is assessed based on a long time series of meteorological data and economic stat istical data

and by the use of a mathematical model and a correlation optimization method. The results of this assessment are used to determine optimal methods for ecological improvement and reconstruction to reduce agriculture svulnerability to drought.

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