密云水库流域蒸发量变化规律及不同蒸发皿转换系数分析
Analysis of evaporation variation and different evaporator conversion coefficients in the Miyun Reservoir basin
樊敏 1卢亚静 2李永坤 2郝天奇 1王主 1张明阳 1褚旭 1李龙1
作者信息
- 1. 北京市密云水库管理处,北京 101512
- 2. 北京市水科学技术研究院,北京 100048
- 折叠
摘要
为分析气候变化背景下密云水库流域蒸发量变化规律,采用气候倾向率、Mann-Kendall趋势检验法和Morlet小波变换法分析密云水库流域1960-2022年白河观测站蒸发皿蒸发量随时间的变化趋势;同时为建立不同型号水面蒸发皿之间的定量转换关系,选择3个典型水文观测站2005-2022年E601型蒸发皿和20 cm 口径蒸发皿的同步观测数据,进行流域年蒸发量计算,并开展不同蒸发皿转换系数的分析.结果表明:1960年以来,密云水库流域蒸发量呈不显著上升趋势,蒸发主要集中在春夏两季,占全年蒸发量的71.3％,四季蒸发量总体上呈现上升—上升—下降—上升的趋势;密云白河观测站蒸发量存在33 a时间尺度的"丰—枯"变化第一主周期及20 a时间尺度的"枯—丰"变化第二主周期.密云水库流域E601型和20 cm 口径2种蒸发皿具有较好的相关性和同步性,白河站、张家坟水文站和下会水文站的蒸发同步观测值在冰期(11月至次年3月)的转换系数分别为0.56、0.52和0.53,非冰期(4-10月)的转换系数分别为0.71、0.70和0.64,全年蒸发皿的转换系数分别为0.68、0.66和0.62.结果对开展密云水库流域蒸发量的统计分析研究具有一定参考价值.
Abstract
To analyze the variation patterns of evaporation in the Miyun Reservoir basin under the back-ground of climate change and the climate tendency rate,Mann-Kendall trend test method and Morlet wavelet transform method were employed to analyze the temporal changes in evaporation from the Baihe observation station in the Miyun Reservoir basin from year 1960 to 2022.Additionally,to establish a quantitative conversion relationship between different types of water surface evaporation dishes,the syn-chronous observation data of the E601 evaporation dish and 20 cm diameter evaporation dish from three typical hydrological observation stations from year 2005 to 2022 were selected to calculate the annual evaporation in the basin and to analyze the conversion coefficients of different evaporation dishes.The re-sults indicated that since year 1960,the evaporation in the Miyun Reservoir basin has shown a non-signifi-cant upward trend,with evaporation primarily concentrated in the spring and summer seasons,accounting for 71.3％of the annual evaporation.Overall,the seasonal evaporation showed an increasing-increasing-decreasing-increasing trend.The evaporation at the Baihe observation station in Miyun exhibited a prima-ry cycle of"abundant-dry"change with a time scale of 33 years and a secondary cycle of"dry-abundant"change with a time scale of 20 years.The E601 and 20cm diameter evaporation dishes in the Miyun Reser-voir basin exhibited good correlation and synchronicity.The conversion coefficients of synchronous obser-vations at the Baihe station,Zhangjiafen hydrological station,and Xiahui hydrological station during the ice period(November to the following March)were 0.56,0.52,and 0.53,respectively,while the conversion coefficients during the non-ice period(April to October)were 0.71,0.70,and 0.64,respectively.The con-version coefficients of the annual evaporation dish were 0.68,0.66,and 0.62,respectively.The result have certain reference value for conducting statistical analysis of evaporation in the Miyun Reservoir basin.
关键词
密云水库/蒸发皿蒸发量/变化特征/气候倾向率/Mann-Kendall趋势检验法/Morlet小波分析/转换系数Key words
Miyun Reservoir/evaporator evaporation capacity/change characteristics/climatic tenden-cy rate/Mann-Kendall trend test method/Morlet wavelet analysis/conversion coefficient引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据