| 长江流域1951—2000年蒸发皿蒸发量变化趋势 |
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| 引用本文： | 宋萌勃,陈吉琴,张晓健,张文杰. 长江流域1951—2000年蒸发皿蒸发量变化趋势[J]. 水资源保护, 2011, 27(1): 24-27. DOI: 10.3969/j.issn.1004-6933.2011.01.006 |
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| 作者姓名： | 宋萌勃 陈吉琴 张晓健 张文杰 |
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| 作者单位： | 1. 长江工程职业技术学院,湖北,武汉,430212
2. 中南电力设计院,湖北,武汉,430071 |
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| 摘 要： | 以长江流域内115个气象站1951—2000年逐日气象观测数据为基础,采用线性倾向估计、滑动平均和相关分析等方法对长江流域近50年来蒸发皿蒸发量及其主要影响因子进行了相关性及趋势性分析。结果表明:近50年来,长江流域4个子区域年平均蒸发皿蒸发量呈下降趋势,其中中游下降趋势明显,其他3区域呈微弱下降趋势;蒸发皿蒸发量下降的主要原因可能是平均水汽压的增加和日照时间的减少。
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| 关 键 词： | 蒸发皿蒸发量 趋势分析 气象因子 长江流域 |
| 修稿时间： | 2011-02-23 |
Pan evaporation trend in Yangtze River Basin from 1951 to 2000 |
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| SONG Meng-Bo,CHEN Ji-qin,ZHANG Xiao-Jian,ZHANG Wen-Jie. Pan evaporation trend in Yangtze River Basin from 1951 to 2000[J]. Water Resources Protection, 2011, 27(1): 24-27. DOI: 10.3969/j.issn.1004-6933.2011.01.006 |
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| Authors: | SONG Meng-Bo CHEN Ji-qin ZHANG Xiao-Jian ZHANG Wen-Jie |
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| Affiliation: | 1. Changjiang Engineering Vocational College, Wuhan 430212, China; 2. Central Southern China Electric Power Design Institute, Wuhan 430071, China) |
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| Abstract: | Based on daily meteorological data of 115 observation stations from 1951 to 2000 within the Yangtze River Basin, the correlation and trend of pan evaporation and its relation with meteorological factors in the past fifty years were analyzed by using linear trend estimate, moving average and correlation analysis method. The results demonstrated that the annual average pan evaporation presented a decrease trend in the past fifty years in the four reaches of Yangtze River Basin. The decrease tendency in the middle reach was more obvious and was weak in the other three reaches. The pan evaporation decrease was primarily resulted from increase of average vapour pressure and reduction of sunshine time. |
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| Keywords: | pan evaporation trend analysis meteorological factors Yangtze River Basin |
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