期刊论文

中文

水土保持通报

1000-288X

2005

25

2

69-73

10.3969/j.issn.1000-288X.2005.02.017

01JZY2102:湖南省***科学基金 03C101:湖南省教育厅科学研究项目

本校为其他机构

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...

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 manifestation of drought conditions and reducing agriculture's vulnerability to drought. The vulnerability of land-based production systems to natural disasters is a function of the systems' underlying ecological integrity. Therefore, ecological improvement and reconstruction may reduce agriculture's vulnerability to drought. Hengyang, an important agricultural area in ...