长沙理工大学学报(自然科学版)
基于降水量距平百分率的湘江流域干旱时空特征研究
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作者单位:

1.长沙理工大学 水利工程学院,湖南 长沙 410114;2.水沙科学与水灾害防治湖南省重点实验室,湖南 长沙 410114;3.湖南省水文水资源勘测局,湖南 长沙 410007;4.澳大利亚国家数据研究所,西澳 佛意特 WA6014

作者简介:

胡国华(1965-),男,湖南永州人,长沙理工大学教授,主要从事水资源演变规律与水灾害防治等方面的研 究。

通讯作者:

胡国华(1965-),男,湖南永州人,长沙理工大学教授,主要从事水资源演变规律与水灾害防治等方面的研 究。

中图分类号:

P333

基金项目:

国家自然科学基金资助项目(51579020);湖南省重大水利科技计划项目(20132432)


Characteristics and adaptation of drought in Xiangjiang River based on the percentage of precipitation anomalies
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(1.School of Hydraulic Engineering,Changsha University of Science & Technology,Changsha 410004,China; 2.Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province,Changsha 410004,China; 3.Hunan Province Hydrology and Water Resources Survey Bureau,Changsha 410007,China; 4.DATA6 1,CSIRO,Floreat WA6014,Australia)

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    摘要:

    研究湘江流域干旱特征变化规律,为该区域的抗旱减灾提供科学依据。利用1961~2018年湘江流域14个气象台站的逐日降水资料,采用降水量距平百分率和干旱频率、干旱强度、干旱站次比等干旱评估指标分析湘江流域近58年干旱时空特征。结果表明:年尺度干旱多发区域集中在流域南部,全流域干旱范围略减,干旱强度略增。干旱时空特征反映在季尺度上的差异显著,具体表现为春旱风险最小,但有变旱的趋势,夏旱风险较大,多发于东北和南部地区,干旱强度和范围均呈减小的趋势,秋旱风险最大,多发于中部和南部,发生范围微增,干旱强度略减,冬旱风险略高于春旱,发生范围和干旱强度均有增大趋势。月尺度干旱风险的变化趋势主要表现为1~6月干旱范围和强度较小,呈减小趋势,7~12月干旱范围和强度呈先增大后减小的趋势,10月的干旱风险最大。

    Abstract:

    The analysis of the characteristics and occurrence regularity of drought in Xiangjiang River basin can provide a scientific basis for drought mitigation. Based on 1961~2018 daily precipitation data collected from 14 meteorological stations in Xiangjiang River basin, drought assessment indexes such as percentage of precipitation anomalies, drought frequency, drought intensity and proportion of the stations were used to analyze spatial and temporal characteristics of drought in Xiangjiang River basin in recent 58 years. The annual drought mainly occurred in the south of the basin and the drought area showed a slight decrease while the drought intensity slightly increased.The characteristics of drought were different significantly reflecting on the seasonal scale. The risk of spring drought was the smallest, but there was a tendency to become dry. The summer drought risk was relatively large and mostly occurred in the northeast and south of Xiangjiang River basin. The intensity and area of summer drought slightly decreased. The risk of autumn drought was the largest and mostly occurred in the central and southern regions. The autumn drought area slightly increased and the drought intensity slightly weakened, and the winter drought risk was higher than that of spring. Winter drought area and intensity showed an increasing tendency. Drought area and intensity decreased from January to June, while the drought area and intensity increased first and then decreased from July to December, and the drought risk was the highest in October.

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胡国华,李滔,盛丰,等.基于降水量距平百分率的湘江流域干旱时空特征研究[J].长沙理工大学学报(自然科学版),2020,17(1):74-82+91.
HU Guo-hua, LI Tao, SHENG Feng, et al. Characteristics and adaptation of drought in Xiangjiang River based on the percentage of precipitation anomalies[J]. Journal of Changsha University of Science & Technology (Natural Science),2020,17(1):74-82+91.

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  • 在线发布日期: 2022-02-26
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