Hydrological process tracing study of the alpine inland basin of the Tibetan Plateau based on hydrogen and oxygen stable isotopes and hydrochemistry
LEI Yizhen,1,2,3, CAO Shengkui,1,2,3, CAO Guangchao2,3, YANG Yufan4, LAN Yao1,2,3, JI Yutong1,2,3, LI Huafei1,2,31. College of Geographical Sciences, Qinghai Normal University, Xining 810008, China 2. Qinghai Provincial Key Laboratory of Physical Geography and Environmental Processes, Xining 810008, China 3. MOE Key Laboratory of Tibetan Plateau Land Surface Processes and Ecological Conservation, Xining 810008, China 4. School of Geography and Tourism, Shaanxi Normal University, Xi'an 710119, China
Abstract Hydrogen and oxygen stable isotopes and hydrochemistry have become vital tracers for studies on the hydrological cycle. The combination of the two tracers is effective to reveal hydrological processes in basins or alpine inland areas lacking hydrological observation data. In the Qinghai-Tibet Plateau, because of harsh surface environment and lacking watershed-scale hydrological observation data, the comprehensive understanding of hydrological cycle process at basin scale is not sufficient so that efficient use of water resources is a shortboard. In this paper, with the Shaliu river basin of Qinghai Lake as the study area, we analyze hydrogen and oxygen stable isotopic component (δD and δ18O) and chloride ion concentration (Cl-) of precipitation, river water and groundwater that are regularly and fixedly sampled in the study area in order to identify and trace the replenishment relationships between water bodies, and then explore whether the D-18O isotope and Cl- can indicate the hydrological process of the basin. Results show that, the water of the main stream is strongly recharged by precipitation and tributary water is weakly recharged by precipitation, and groundwater is always weakly recharged by precipitation from upstream to downstream in the Shaliu river basin of the Qinghai Lake. The water of the main stream in the lower reaches was mainly replenished by groundwater of lower reaches and the tributaries of the whole region, accounting for 15.45% and 84.55%, respectively. The groundwater in the lower reaches is mainly supplied by river water and groundwater in the middle (42.40%) and upper reaches (57.60%). The above results show that the combination of hydrogen and oxygen stable isotopes and hydrochemical method can effectively reveal the hydrologic processes of alpine inland river basin. This paper can provide an excellent example for hydrologic processes research in the similar study areas of the Qinghai-Tibet Plateau, which help us have a deep understanding of the hydrological cycle process of the alpine inland river basin, and provide a scientific basis for the optimal utilization and allocation of water resources in the basin. Keywords:stable isotope of hydrogen and oxygen;hydrochemistry;hydrological process;Qinghai Lake;Shaliu river basin
PDF (3084KB)元数据多维度评价相关文章导出EndNote|Ris|Bibtex收藏本文 本文引用格式 雷义珍, 曹生奎, 曹广超, 杨羽帆, 兰垚, 季雨桐, 李华非. 基于氢氧稳定同位素和水化学的青藏高原高寒内陆流域水文过程示踪研究. 地理研究[J], 2021, 40(5): 1239-1252 doi:10.11821/dlyj020200608 LEI Yizhen, CAO Shengkui, CAO Guangchao, YANG Yufan, LAN Yao, JI Yutong, LI Huafei. Hydrological process tracing study of the alpine inland basin of the Tibetan Plateau based on hydrogen and oxygen stable isotopes and hydrochemistry. Geographical Research[J], 2021, 40(5): 1239-1252 doi:10.11821/dlyj020200608
Tab. 1 表1 表1沙柳河流域降水氢氧稳定同位素组成平均值及其线性关系 Tab. 1The hydrogen-oxygen stable isotopic average compositions in precipitation and their linear relationships in Shaliu river basin
Tab. 2 表2 表2沙柳河流域河水和地下水δD、δ18O和d-excess平均值及Cl-离子平均浓度变化 Tab. 2Variations of δD, δ18O and d-excess average values and Cl- mean concentrations of river water and groundwater in Shaliu river basin
Fig. 2Variations for δD, δ18O and d-excess average values and Cl- mean concentrations of river water and groundwater with distance from headwaters in Shaliu river basin
Tab. 3 表3 表3水文站(A1) 河水δD、δ18O和d-excess值及Cl- 离子浓度变化 Tab. 3Variations of river water δD, δ18O and d-excess values and Cl- concentrations at hydrological station (A1)
注:2009—2010年LMWL引自文献[13],2012年夏季LMWL引自文献[35]。 Fig. 4The relationships between δD and δ18O in precipitation, river water and groundwater of Shaliu river basin
注:2009—2010年LMWL引自文献[13],2012年夏季LMWL引自文献[35],详见图4。 Fig. 5The temporal variation and spatial distribution of δD and δ18O values of river water and groundwater in the Shaliu River Basin
注:图中百分比(%)为各支流对水文站河水的补给比例;各干支流河水和地下水采样点的d-excess值和Cl-离子浓度数据见表2。 Fig. 7Conceptual model of the hydrological processes on Shaliu river basin of Qinghai Lake
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