| 甘肃省水旱灾害时空分布特征及其与粮食产量的关系 |
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| 引用本文： | 郭小燕,张家武,陈雪梅,王君兰,李双.甘肃省水旱灾害时空分布特征及其与粮食产量的关系[J].干旱区资源与环境,2011(6):132-137. |
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| 作者姓名： | 郭小燕 张家武 陈雪梅 王君兰 李双 |
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| 作者单位： | 兰州大学西部环境教育部重点实验室西部环境与气候变化研究院 |
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| 基金项目： | 国家创新研究群体科学基金(NSFC40721061)资助 |
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| 摘 要： | 全球变暖的背景下,气象灾害呈明显上升趋势,极端干旱事件频繁发生,给农业生产造成严重损失.水旱灾害是对农业生产产生影响最直接、最经常性的灾害类型,其与农业产量关系的研究可为农业生产、防灾减灾、粮食安全评估等提供基础的科学依据.文中以我国西北甘肃省为例,根据1985-2007年全省水旱灾害受灾面积、成灾面积、粮食产量数据,...
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| 关 键 词： | 甘肃省 水旱灾害 时空分布 粮食产量 |
Temporal and spatial distribution of drought-flood hazards in Gansu Province and its relationship with regional grain output |
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| GUO Xiaoyan,ZHANG Jiawu,CHEN Xuemei,WANG Junlan,LI Shuang.Temporal and spatial distribution of drought-flood hazards in Gansu Province and its relationship with regional grain output[J].Journal of Arid Land Resources and Environment,2011(6):132-137. |
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| Authors: | GUO Xiaoyan ZHANG Jiawu CHEN Xuemei WANG Junlan LI Shuang |
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| Institution: | (Key Laboratory of Western China’s Environmental Systems(Ministry of Education) Lanzhou University,Research School of Arid Environment & Climate Change,Lanzhou 730000,P.R.China) |
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| Abstract: | Under the background of global warming,meteorological disasters have been increasing and the extreme drought events have frequently occurred and resulted in serious losses to regional agricultural production.Among the meteorological hazards,floods and droughts are the most directly related to agriculture and the relationship between these hazards and the grain yield could provide basis for hazards mitigation and grain supply.According to the statistics of the influencing area,stricken grain yield and the total agricultural output value from the census results from 1985 to 2007 in Gansu Province,we analyzed the essential characteristics of droughts and floods and their temporal and spatial distribution in Gansu Province.The relationship between the drought and flood disasters and the local grain yield as well as the total agricultural output value suggested that the impact of drought is serious and it has a wide distribution in the Gansu province.The probability of drought and flood disasters in the southeast of Gansu is far higher than that in Hexi areas.Significant correlation between the grain yield and affected areas of the floods in Hexi region is obvious,indicating that the floods is favorable for grain production the irrigated regions in arid area.Droughts would cause reduction in grain output in both irrigated and non-irrigated regions.Our results indicated the importance of irrigation and the efficiency of water utilization in arid and semi-arid regions. |
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| Keywords: | Gansu Province drought and flood disasters temporal and spatial distribution grain yield |
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