海河流域ET<sub>0</sub>演变规律及灵敏度分析

杨贵羽; 王知生; 王浩; 贾仰文

海河流域ET₀演变规律及灵敏度分析

1.
中国水利水电科学研究院水资源研究所, 北京, 100044;
2.
赤峰市水文勘测局, 内蒙古, 赤峰, 024000

基金项目: 国家重点基础研究发展计划(973)资助项目(2006CB403404);国家自然科学基金创新研究群体科学基金资助项目(50721006)

详细信息

作者简介:
杨贵羽(1974- ),女,汉族,内蒙古乌兰察布人.高级工程师,博士,主要从事土壤学和水文水资源方面研究.E-mail;gujyuy@iwhr.com

中图分类号: TV121.2

Potential evapotranspiration evolution rule and its sensitivity analysis in Haihe River basin

1.
Institution of Water Resources and Hydropower Research, Beijing 100044, China;
2.
Hydrology Survey Bureau of Chifeng, Chifeng 024000, China

Funds: The study is financially supported by thr National Basic Research Program of China(No.2006CB403404)and National Natural Science Foundation of China(No.50721006).

摘要: 根据国家气象站1956-2000年逐日气象资料,采用Penman-Monteith公式和灵敏指数法,分析了海河流域潜在蒸发蒸腾(ET₀)的演变规律及与气象要素的灵敏关系。结果表明:全流域45年ET₀呈下降趋势,但年际间呈现4个阶段;逐旬呈倒"V"字型,61.6%集中于4月中旬到8月上旬。在空间上,年和旬值呈现上游小下游大。通过ET₀与气象要素演变的比较及灵敏性分析发现,全流域年ET₀演变与年均风速、日照时数以及短波辐射相似,与温度相反。旬ET₀演变与旬平均温度、实际水汽压、日照时数以及短波辐射相似,但对各要素的灵敏系数以短波辐射最大,其它要素则随时空变化,且彼此的灵敏系数相差较大。分析表明在气象要素的综合作用下,造成全流域ET₀降低的主要原因可能在于短波辐射、日照时数的变化。
- 潜在蒸发蒸腾量(ET₀) /
- 气象要素 /
- 演变规律 /
- 灵敏系数 /
- 海河流域
Abstract: Based on the daily climatic data from the nation weather station in 1956-2000,the paper employs the P-M equation and the sensitivity coefficient method to analyze the evolution rule of the potential evapotranspiration(ET₀)and the sensitivity relation of ET₀ to climatic variables in Haihe River basin.The results indicate that the annual ET₀ series appears decreasing trend with four different sub-stages in the recent 45 years.The multi-annual ten-day average ET₀ shows inverse "V" shape, and 61.6% of the whole ET₀ amount occurs in the middle-April to the up-August.In space,the multi-annual ten-day average and the annual ET₀ have an increasing trend from the upstream to the downstream.Compared with the evolution rule of the climatic variables and the sensitivity of ET₀ to them,the evolution rule of the annual ET₀ in the whole basin is similar to that of the multi-annual average wind speed,sunshine time and short wave radiation,and inverses to that of the multi-annual average temperature.The evolution rule of the multi-annual ten-day average ET₀ has same trend to that of the temperature,actual vapor,and sunshine time,as wel as the short wave radiation.However,in all the sensitivity coefficient of ET₀ to these climatic variables,that of ET₀ to short wave radiation is maximum in the whole year and the second water resources districts.The sensitivity of the ET₀ to any other climatic variables is different in time and space,and the values of sensitivity coefficients vary greatly.According to the analysis above,the ET₀cs decreasing trend in the whole basin may be caused by the change of short wave radiation and sunshine time.
- potential evapotranspiration(ET₀) /
- climatic elements /
- evolution rule /
- sensitivity coeficient /
- Haihe River basin

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海河流域ET₀演变规律及灵敏度分析

作者简介:
杨贵羽(1974- ),女,汉族,内蒙古乌兰察布人.高级工程师,博士,主要从事土壤学和水文水资源方面研究.E-mail;gujyuy@iwhr.com

Potential evapotranspiration evolution rule and its sensitivity analysis in Haihe River basin

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海河流域ET₀演变规律及灵敏度分析

1. 中国水利水电科学研究院水资源研究所, 北京, 100044;

2. 赤峰市水文勘测局, 内蒙古, 赤峰, 024000

作者简介:
杨贵羽(1974- ),女,汉族,内蒙古乌兰察布人.高级工程师,博士,主要从事土壤学和水文水资源方面研究.E-mail;gujyuy@iwhr.com

English Abstract

Potential evapotranspiration evolution rule and its sensitivity analysis in Haihe River basin

1. Institution of Water Resources and Hydropower Research, Beijing 100044, China;

2. Hydrology Survey Bureau of Chifeng, Chifeng 024000, China

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海河流域ET0演变规律及灵敏度分析

作者简介: 杨贵羽(1974- ),女,汉族,内蒙古乌兰察布人.高级工程师,博士,主要从事土壤学和水文水资源方面研究.E-mail;gujyuy@iwhr.com

Potential evapotranspiration evolution rule and its sensitivity analysis in Haihe River basin

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海河流域ET0演变规律及灵敏度分析

1. 中国水利水电科学研究院水资源研究所, 北京, 100044; 2. 赤峰市水文勘测局, 内蒙古, 赤峰, 024000

作者简介: 杨贵羽(1974- ),女,汉族,内蒙古乌兰察布人.高级工程师,博士,主要从事土壤学和水文水资源方面研究.E-mail;gujyuy@iwhr.com

English Abstract

Potential evapotranspiration evolution rule and its sensitivity analysis in Haihe River basin

1. Institution of Water Resources and Hydropower Research, Beijing 100044, China; 2. Hydrology Survey Bureau of Chifeng, Chifeng 024000, China

全文HTML

目录

海河流域ET₀演变规律及灵敏度分析

作者简介:
杨贵羽(1974- ),女,汉族,内蒙古乌兰察布人.高级工程师,博士,主要从事土壤学和水文水资源方面研究.E-mail;gujyuy@iwhr.com

海河流域ET₀演变规律及灵敏度分析

1. 中国水利水电科学研究院水资源研究所, 北京, 100044;

2. 赤峰市水文勘测局, 内蒙古, 赤峰, 024000

作者简介:
杨贵羽(1974- ),女,汉族,内蒙古乌兰察布人.高级工程师,博士,主要从事土壤学和水文水资源方面研究.E-mail;gujyuy@iwhr.com

1. Institution of Water Resources and Hydropower Research, Beijing 100044, China;

2. Hydrology Survey Bureau of Chifeng, Chifeng 024000, China