甘肃民勤小型与E-601型蒸发皿蒸发量折算系数分析--《干旱气象》2014年03期

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Z,ShF3Wc0甘肃民勤小型与E-601型蒸发皿蒸发量折算系数分析水利论文Jkn5S!ZZ$c9\

g%Gl4YhD0谢万银 陈英 徐彬

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;S4@'j.ipj0【摘要】:利用民勤国家基准气候站1992~2001年5~9月各月小型与E-601型2种蒸发皿蒸发量的同步对比观测资料,通过对比分析、相关分析、离差分析方法以及气候估算值分析得出:(1)各月小型与E-601型2种蒸发的折算系数在0.504~0.601之间,平均折算系数为0.574;各年2种蒸发的折算系数在0.529~0.608之间,平均折算系数为0.574;(2)2种蒸发量5~9月的月、年平均折算系数相同,2种月蒸发量的平均相关系数为0.952,相关性很好,但2种蒸发的年平均相关系数为0.330,相关性很不理想,因此利用按月计算的折算系数来换算2种蒸发量更为合理;(3)小型蒸发量的离差系数大于E-601型蒸发量,小型蒸发量的离散程度比E-601型蒸发量大。由于E-601型蒸发量只有5~9月有观测资料,在考虑民勤站小型蒸发与E-601型蒸发资料互相换算时,首先考虑将E-601型蒸发量换算为小型蒸发量来利用,为有效利用民勤长序列小型蒸发量资料做了很好的衔接。水利论文(U/etD&r"M

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【作者单位】:水利论文'yl%ir,jdu8o

5mwg!]nG,WHIb0中国气象局兰州干旱气象研究所 甘肃省干旱气候变化与减灾重点实验室 中国气象局干旱气候变化与减灾重点开放实验室;甘肃省民勤县气象局;

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f8UC^W,osn|0【关键词】:水利论文/B3g.Kk2f;c9j

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小型蒸发和E-型蒸发 折算系数 民勤水利论文 G"HR| tF

?+d+z b$@-NDNx9M0【分类号】:P426.2水利论文m.{,Z-D PE s

'@x6e? p-Den0【正文快照】:水利论文U/['r%J] vCLM(X

uD"iI+F,@'CXv0引言下垫面的水分蒸发是水分循环的重要组成部分,蒸发量的变化是气候变化的综合反映,其研究对深入了解气候变化规律及对未来水资源的规划设计和开发利用具有重要的参考价值[1]。蒸发量的研究不仅在水文、水利、水库工程的运行管理领域有极其重要的作用,而且对气候变化及水资源

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