中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
蒋家沟流域雨季降水中氢氧同位素特征分析

文献类型:期刊论文

作者郭晓军; 洪勇
刊名水土保持研究
出版日期2012-04
卷号19期号:2页码:82-85
关键词降水 氢氧同位素 大气降水线 氘盈余 地下水 蒋家沟
其他题名Characteristics of Hydrogen and Oxygen Isotopes in Rainy Season Precipitation in Jiangjiagou Watershed
通讯作者郭晓军
中文摘要通过分析蒋家沟流域2001—2009年内降雨资料,发现降雨频率服从幂指数分布,分析蒋家沟流域2010年雨季降水的氢氧同位素组成,得出当地大气降水线,其截距与我国大气降水线相比较小,这与研究区地处内陆干热河谷、蒸发作用强烈有关;降水中氘盈余7月中旬之前较大,均为正值,7月中旬到8月中旬由于空气湿度相对较高,氘盈余减小,8月中旬之后,随着空气湿度重新减小,d值增大;根据次降雨采集的降水样品分析,δ18 O显示出明显的降水量效应,即降水量较大的降水场次内δ18 O较小,在同一场降雨内,δ18 O也随着降雨时间的持续和降水量的增加而呈减小趋势;受山区降雨的随机性影响,蒋家沟流域内稳定同位素的高程效应较为反常,海拔越高的地方,δ18 O越大。
英文摘要The rainfall events occurred from 2001to 2009in Jiangjiaou watershed was analyzed.The rainfall
frequency and cumulative frequency of rainfall before triggering of a debris flow can be fitted by power exponent
 distribution and logarithmic distribution,respectively.This result shows that the triggering of debris by
rainfall is a random phenomenon,and subjects a random distribution.The isotopic compositions of precipitation
 over the Jiangjiagou watershed in the summer of 2010are studied.Local meteoric water line is fitted as
δD=7.1086δ18 O-14.22.Its intercept is lower than that of Chinese meteoric water line which is related to
the geographical and meteorological characteristics in this area.With the change of air humidity,the values
of deuterium excess are positive before mid-July,and are much lower during mid-July and mid-August,then
increase again after the mid-August.Theδ18 O value in an individual rainfall is lower as the rainfall increases.
By the effort of the randomness of the mountain area precipitation,the stable isotopic concentration is higher
as the attitude rises
分类号P426.612
收录类别CSCD
资助信息国家重点基础研究(973)项目(2011CB409902);国家自然科学基金(40801009)
语种中文
CSCD记录号CSCD:4502305
公开日期2013-01-10
源URL[http://192.168.143.20:8080/handle/131551/4794]  
专题成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
推荐引用方式
GB/T 7714
郭晓军,洪勇. 蒋家沟流域雨季降水中氢氧同位素特征分析[J]. 水土保持研究,2012,19(2):82-85.
APA 郭晓军,&洪勇.(2012).蒋家沟流域雨季降水中氢氧同位素特征分析.水土保持研究,19(2),82-85.
MLA 郭晓军,et al."蒋家沟流域雨季降水中氢氧同位素特征分析".水土保持研究 19.2(2012):82-85.

入库方式: OAI收割

来源:成都山地灾害与环境研究所

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