Isotopic evidence for the moisture origin and composition of surface runoff in the headwaters of the Heihe River basin

查看全文 作　　者：ZHAO [1,2,3]LiangJu;YIN [1]Li;XIAO [1]HongLang;CHENG [2]GuoDong;ZHOU [1]MaoXian;YANG [1]YongGang;LI [1]CaiZhi;ZHOU [2]Jian

机构地区：[1]Key Laboratory ofEcohydrology oflnland River Basin, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;[2]State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;[3]Heihe Upstream Watershed Ecology-Hydrology Experimental Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China

出　　处：《Chinese Science Bulletin》索引2011年第56卷第4期,共11页

基　　金：supported by the National Natural Science Foundation of China (91025016);the West Light Foundation of Western Doctors of the Chinese Academy of Sciences,the West Action Program of the Chinese Academy of Sciences (KZCX2-XB2-04-03);the China Postdoctoral Science Foundation (200801244 and 20070420135) 摘　　要：We investigated the moisture origin and contribution of different water sources to surface runoff entering the headwaters of the Heihe River basin on the basis of NECP/NCAR(National Centers for Environmental Prediction/National Center for Atmospheric Research) re-analysis data and variations in the stable hydrogen and oxygen isotope ratios(δ D and δ 18O) of precipitation,spring,river,and melt water. The similar seasonality in precipitation δ 18O at different sites reveals the same moisture origin for water entering the headwaters of the Heihe River basin. The similarity in the seasonality of δ 18O and d-excess for precipitation at Yeniugou and Urumchi,which showed more positive δ 18O and lower d-excess values in summer and more negative δ 18O and higher d-excess values in winter,indicates a dominant effect of westerly air masses in summer and the integrated influence of westerly and polar air masses in winter. Higher d-excess values throughout the year for Yeniugou suggest that in arid inland areas of northwestern China,water is intensively recycled. Temporal changes in δ 18O,δ D,and d-excess reveal distinct contributions of different bodies of water to surface runoff. For example,there were similar trends for δ D,δ 18O,and d-excess of precipitation and river water from June to September,similar δ 18O trends for river and spring water from December to February,and similar trends for precipitation and runoff volumes. However,there were significant differences in δ 18O between melt water and river water in September. Our results show that the recharge of surface runoff by precipitation occurred mainly from June to mid-September,whereas the supply of surface runoff in winter was from base flow(as spring water) ,mostly with a lower runoff amount. 关键词：水分来源地表径流同位素比值黑河流域上游组成证据降水量

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Isotopic evidence for the moisture origin and composition of surface runoff in the headwaters of the Heihe River basin

参考文献(43)

引证文献(37)

耦合文献(333)

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