摘要
水库库面蒸发是引起水库水量损失的主要影响因素之一,本文利用密云水库1960—2016年Ф20蒸发皿实测蒸发量资料,运用数理统计的方法初步分析了密云水库蒸发量的月、季节、年以及代际变化特性,变化趋势以及突变情况,统计了其折算系数变化过程。结果表明:57年长系列数据下密云水库蒸发量月、季节、年蒸发量都有上升的趋势,但上升趋势不显著;偏多趋势多发生在夏、秋两季,年内分配不均匀,代际蒸发量经历了“多—少—多—多—多—多”的变化过程,根据累积距平曲线和Yamamoto检验法对年蒸发量进行突变分析,得出密云水库年蒸发量在1976年发生一次突变。
Reservoir surface evaporation is one of the main influencing factors that cause reservoir water loss.This paper uses the measured evaporation data ofФ20 evaporation pan from Miyun Reservoir from 1960 to 2016,and uses mathematical statistical methods to analyze the characteristics of monthly,seasonal,annual and intergenerational changes,trends and abrupt changes of Miyun Reservoir evaporation,and statistics the change process of its conversion coefficient.The results show that the monthly,seasonal,and annual evaporation of Miyun Reservoir has an upward trend under the 57-year long series of data,but the upward trend is not significant.Most of the trends occur in summer and autumn,and the distribution is uneven during the year.The global evaporation has undergone a"many-less-many-many-many-many-many"change process.According to the cumulative anomaly curve and the Yamamoto test,the abrupt change of the annual evaporation was analyzed,and it was concluded that the abrupt change occurred in the annual evaporation of Miyun Reservoir in 1976.
作者
李婵娟
段新光
焦有权
LI Chan-juan;DUAN Xin-guang;JIAO You-quan(Beijing Miyun Reservoir Management Office,Beijing 101512,China;Beijing Vocational College of Agriculture,Beijing 102442,China)
出处
《价值工程》
2020年第9期200-202,共3页
Value Engineering
关键词
密云水库
蒸发系数
蒸发量
变化趋势
Miyun Reservoir
evaporation coefficient
evaporation
change trend
作者简介
李婵娟(1985-),女,北京人,工程师,本科,研究方向为水资源与流域规划;通讯作者:焦有权(1976-),男,北京人,副教授,工学博士,研究方向为水利工程。
