干旱区生态环境知识资源中心(Arid): Distribution of isotopes and chemicals in precipitation in Shule River Basin, northwestern China: an implication for water cycle and groundwater recharge

Arid

	Distribution of isotopes and chemicals in precipitation in Shule River Basin, northwestern China: an implication for water cycle and groundwater recharge
	Zhao Wei; Ma Jinzhu; Gu Chunjie; Qi Shi; Zhu Gaofeng; He Jiahua
来源期刊	Journal of Arid Land
ISSN	1674-6767
出版年	2016
卷号	8 期号:6 页码:973-985
英文摘要	The distribution of stable isotopes and ions in precipitation in the Shule River Basin, northwestern China, were investigated to understand the regional water cycle and precipitation input to groundwater recharge. The study found that the mean annual concentrations of Ca~(2+), Na~+, SO_4~(2-), Cl~-, Mg~(2+), NO_3~-, and K~+ in the basin were lower than those in other arid areas of northwestern China. The average concentrations of ions in the lower reaches of the Shule River were higher than those in the upper reaches. The results showed that the main ionic concentrations decreased with the increase of precipitation amount, indicating that heavy precipitation cannot only wash crustal aerosols out of the atmosphere, but also create a dilution effect. Cl~-and Na~+ in precipitation had a strong and positive correlation, suggesting a common origin for the two ions. However, the excess of Na~+, combined with non-marine SO_4~(2-)and NO_3~-, indicated that some ions were contributed by terrestrial origins. In the extremely arid regions of northwestern China, the evaporation process obviously changes the original relationship between delta~2H and delta~(18)O in precipitation, and leads to d-excess values <8. delta~(18)O and temperature were significantly correlated, suggested that temperature strongly affected the characteristics of isotopes in the study area. The delta~(18)O value indicates a dominant effect of westerly air masses and southwest monsoon in warm months, and the integrated influence of westerly and Siberian-Mongolian polar air masses in cold months. The d-excess values were generally lower in warm months than those in cold months, indicating that post-condensation processes played a significant role in the water cycle. The results provide reliable precipitation input information that can be used in future groundwater recharge calculations in the study area.
英文关键词	precipitation stable isotopes ions westerly air masses Shule River Basin
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	Geology
CSCD记录号	CSCD:5828505
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335721
作者单位	Zhao Wei, College of Earth Environmental Sciences, Lanzhou University, Key Laboratory of Western China's Environmental Systems (Ministry of Education), Lanzhou, Gansu 730000, China.; Ma Jinzhu, College of Earth Environmental Sciences, Lanzhou University, Key Laboratory of Western China's Environmental Systems (Ministry of Education), Lanzhou, Gansu 730000, China.; Gu Chunjie, College of Earth Environmental Sciences, Lanzhou University, Key Laboratory of Western China's Environmental Systems (Ministry of Education), Lanzhou, Gansu 730000, China.; Qi Shi, College of Earth Environmental Sciences, Lanzhou University, Key Laboratory of Western China's Environmental Systems (Ministry of Education), Lanzhou, Gansu 730000, China.; Zhu Gaofeng, College of Earth Environmental Sciences, Lanzhou University, Key Laboratory of Western China's Environmental Systems (Ministry of Education), Lanzhou, Gansu 730000, China.; He Jiahua, College of Earth Environmental Sciences, Lanzhou University, Key Laboratory of Western Chi...
推荐引用方式 GB/T 7714	Zhao Wei,Ma Jinzhu,Gu Chunjie,et al. Distribution of isotopes and chemicals in precipitation in Shule River Basin, northwestern China: an implication for water cycle and groundwater recharge[J],2016,8(6):973-985.
APA	Zhao Wei,Ma Jinzhu,Gu Chunjie,Qi Shi,Zhu Gaofeng,&He Jiahua.(2016).Distribution of isotopes and chemicals in precipitation in Shule River Basin, northwestern China: an implication for water cycle and groundwater recharge.Journal of Arid Land,8(6),973-985.
MLA	Zhao Wei,et al."Distribution of isotopes and chemicals in precipitation in Shule River Basin, northwestern China: an implication for water cycle and groundwater recharge".Journal of Arid Land 8.6(2016):973-985.