洞庭湖流域下落雨滴蒸发研究

doi:10.13249/j.cnki.sgs.2018.08.019

地理科学 ›› 2018, Vol. 38 ›› Issue (8): 1364-1369.doi: 10.13249/j.cnki.sgs.2018.08.019

洞庭湖流域下落雨滴蒸发研究

黄一民^1,²(), 宋献方¹, 何清华², 章新平³

1.中国科学院地理科学与资源研究所陆地水循环及地表过程重点实验室,北京100101
2.衡阳师范学院城市与旅游学院,湖南衡阳421002
3.湖南师范大学资源与环境科学学院,湖南长沙 410081

收稿日期:2017-09-01 修回日期:2018-02-17 出版日期:2018-08-20 发布日期:2018-08-20
作者简介:
作者简介：黄一民（1980-）,男,湖南汨罗人,博士,讲师,主要从事同位素水文学研究。E-mail: hymin2004@sina.com
基金资助:
国家自然科学基金项目（41401019）、湖南省自然科学基金（2018JJ2009）资助

Study of Sub-cloud Evaporation in the Dongting Lake Basin

Yimin Huang^1,²(), Xianfang Song¹, Qinghua He², Xinping Zhang³

1.Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Science and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
2. City and Tourism Management Department, Hengyang Normal University, Hengyang 421002, Hunan, China
3. College of Resources and Environmental Sciences, Hunan Normal University, Changsha 410081, Hunan, China

Received:2017-09-01 Revised:2018-02-17 Online:2018-08-20 Published:2018-08-20
Supported by:
National Natural Science Foundation of China(41401019), Natural Science Foundation of Hunan Province(2018JJ2009)

摘要/Abstract

摘要：

通过在亚热带季风区内的洞庭湖流域对降水事件取样以及气象资料的收集,采用降水同位素对流域下落雨滴蒸发以及影响因素进行了研究。研究发现：流域不同季节大气水线的理论斜率均高于观测斜率,由此可判断形成流域降水的雨滴在下落过程中经历了不同程度的蒸发。进一步计算表明流域下落雨滴的蒸发比率介于0.21%~19.29%之间,蒸发比每增大1.0%,过量氘（d）将减小1.38‰。从主要影响下落雨滴蒸发的气温、湿度和雨滴直径来看,流域下落雨滴蒸发与气温呈显著正相关,与相对湿度、雨滴直径呈显著负相关。另外,流域下落雨滴蒸发随降水量增大呈指数函数递减,其并非指示降水量直接影响雨滴的蒸发,而是湿度、雨滴直径等综合作用的结果。

关键词: 过量氘, 下落雨滴蒸发, 洞庭湖流域

Abstract:

In this study, to reveal the sub-cloud evaporation and influence factors on it, precipitation events were collected from January 2010 to December 2012, with the corresponding meteorological parameters, that is, amount of precipitation, air temperature and humidity measured in the Dongting Lake Basin, which located in the subtropical monsoon region. It is found that the theoretical slope of the meteoric water lines in different seasons are higher than the observed slope of the meteoric water lines, respectively, and it can be concluded that the raindrops formed in the basin have experienced evaporation during falling. Further calculations show that the evaporation rate of raindrops is between 0.21% to 19.29%, falling by 1.0%, and deuterium excess decreases by 1.38‰. As temperature, humidity and raindrop diameter are the main factors that affect evaporation of the falling raindrops, we found that the evaporation of the raindrops have significant positive correlation with the temperature, and significant negative correlation with the relative humidity and raindrop diameter. In addition, the evaporation of raindrops decreases exponentially with the increase of precipitation amount in the basin, that doesn’t illustrate precipitation amount’s affect, but the result of humidity and raindrop diameter.

Key words: deuterium excess, sub-cloud evaporation, the Dongting Lake Basin

中图分类号:

P426.2

黄一民, 宋献方, 何清华, 章新平. 洞庭湖流域下落雨滴蒸发研究[J]. 地理科学, 2018, 38(8): 1364-1369.

Yimin Huang, Xianfang Song, Qinghua He, Xinping Zhang. Study of Sub-cloud Evaporation in the Dongting Lake Basin[J]. SCIENTIA GEOGRAPHICA SINICA, 2018, 38(8): 1364-1369.

图/表 4

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	全年	春	夏	秋	冬
S	8.57	8.24	7.85	8.11	8.33
S_T	8.56	8.75	7.97	8.39	9.04

洞庭湖流域下落雨滴蒸发研究

Study of Sub-cloud Evaporation in the Dongting Lake Basin

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