Tracing potential water sources of the Nagqu River using stable isotopes
Study region: The Nagqu River watershed (NRW) on the Qinghai–Tibet Plateau (QTP). Study focus: Precipitation, snowmelt, streamflow, and groundwater samples were collected in the NRW and used to analyze the contribution of different water sources to streamflow during different freeze–thaw periods. St...
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doaj-e5f9c891f8ea4a4c89ab6a62e3be99972021-03-27T04:27:43ZengElsevierJournal of Hydrology: Regional Studies2214-58182021-04-0134100807Tracing potential water sources of the Nagqu River using stable isotopesYuheng Yang0Baisha Weng1Denghua Yan2Xiaoyan Gong3Yanyu Dai4Yongzhen Niu5Guoqiang Dong6State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China; Department of Geography, National University of Singapore, Arts Link, Kent Ridge, 117570, SingaporeState Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China; Corresponding author.State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, ChinaState Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China; College of the New Energy and Environment, Jilin University, Changchun, Jilin Province, 130021, ChinaState Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China; College of Hydrology and Water Resources, Hohai University, Nanjing, 210098, ChinaState Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China; School of Water Conservancy and Hydroelectric Power, Hebei University of Engineering, Handan, 056021, ChinaState Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, ChinaStudy region: The Nagqu River watershed (NRW) on the Qinghai–Tibet Plateau (QTP). Study focus: Precipitation, snowmelt, streamflow, and groundwater samples were collected in the NRW and used to analyze the contribution of different water sources to streamflow during different freeze–thaw periods. Stable isotopes of hydrogen (D) and oxygen (18O) and water chemistry were analyzed for the period ranging from 2016 to 2019, and tritium (T) and carbon-14 (14C) isotopes were analyzed for 2019. New hydrological insights for the region: Rain and snowmelt were found to reflect the chemical characteristics of precipitation, and the primary ions in both water types were Ca2+ and SO42−. The δD and δ18O isotope values of rain and snowmelt were relatively low during the entire thaw period (from June to October) and relatively high in the entire frozen period (from November to May). The results of the optimum multiparameter and mass balance analyses showed that groundwater and snowmelt accounted for approximately 39.8 % and 32.2 % to the Nagqu River water flow, respectively, whereas precipitation accounted for approximately 28.0 %. The groundwater in clastic rock fissures around the northern Cuona Lake, and permafrost and ground ice in the bedrock layer were identified as older water types with relatively low infiltration rates, and bedrock fissures in the southeastern and southwestern areas contained younger water with better recoverability.http://www.sciencedirect.com/science/article/pii/S2214581821000367Stable isotopePrecipitationStreamflowSnowmeltGroundwaterHydrologic pathway |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yuheng Yang Baisha Weng Denghua Yan Xiaoyan Gong Yanyu Dai Yongzhen Niu Guoqiang Dong |
spellingShingle |
Yuheng Yang Baisha Weng Denghua Yan Xiaoyan Gong Yanyu Dai Yongzhen Niu Guoqiang Dong Tracing potential water sources of the Nagqu River using stable isotopes Journal of Hydrology: Regional Studies Stable isotope Precipitation Streamflow Snowmelt Groundwater Hydrologic pathway |
author_facet |
Yuheng Yang Baisha Weng Denghua Yan Xiaoyan Gong Yanyu Dai Yongzhen Niu Guoqiang Dong |
author_sort |
Yuheng Yang |
title |
Tracing potential water sources of the Nagqu River using stable isotopes |
title_short |
Tracing potential water sources of the Nagqu River using stable isotopes |
title_full |
Tracing potential water sources of the Nagqu River using stable isotopes |
title_fullStr |
Tracing potential water sources of the Nagqu River using stable isotopes |
title_full_unstemmed |
Tracing potential water sources of the Nagqu River using stable isotopes |
title_sort |
tracing potential water sources of the nagqu river using stable isotopes |
publisher |
Elsevier |
series |
Journal of Hydrology: Regional Studies |
issn |
2214-5818 |
publishDate |
2021-04-01 |
description |
Study region: The Nagqu River watershed (NRW) on the Qinghai–Tibet Plateau (QTP). Study focus: Precipitation, snowmelt, streamflow, and groundwater samples were collected in the NRW and used to analyze the contribution of different water sources to streamflow during different freeze–thaw periods. Stable isotopes of hydrogen (D) and oxygen (18O) and water chemistry were analyzed for the period ranging from 2016 to 2019, and tritium (T) and carbon-14 (14C) isotopes were analyzed for 2019. New hydrological insights for the region: Rain and snowmelt were found to reflect the chemical characteristics of precipitation, and the primary ions in both water types were Ca2+ and SO42−. The δD and δ18O isotope values of rain and snowmelt were relatively low during the entire thaw period (from June to October) and relatively high in the entire frozen period (from November to May). The results of the optimum multiparameter and mass balance analyses showed that groundwater and snowmelt accounted for approximately 39.8 % and 32.2 % to the Nagqu River water flow, respectively, whereas precipitation accounted for approximately 28.0 %. The groundwater in clastic rock fissures around the northern Cuona Lake, and permafrost and ground ice in the bedrock layer were identified as older water types with relatively low infiltration rates, and bedrock fissures in the southeastern and southwestern areas contained younger water with better recoverability. |
topic |
Stable isotope Precipitation Streamflow Snowmelt Groundwater Hydrologic pathway |
url |
http://www.sciencedirect.com/science/article/pii/S2214581821000367 |
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