Journal
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
Volume 34, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.ejrh.2021.100807
Keywords
Stable isotope; Precipitation; Streamflow; Snowmelt; Groundwater; Hydrologic pathway
Categories
Funding
- National Natural Science Foundation of China [51879276, 91547209, 52022110]
- Second Tibetan Plateau Scientific Expedition and Research Program [2019QZKK0207]
- National Key Research and Development Project [2016YFA0601503]
- State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin [SKL2018ZY03]
Ask authors/readers for more resources
The study focused on analyzing the contribution of different water sources to streamflow in the Nagqu River watershed on the Qinghai-Tibet Plateau. The results showed that rain and snowmelt reflected the chemical characteristics of precipitation, with groundwater and snowmelt being the primary sources of water flow. Different types of groundwater were identified in the region, with varying levels of permeability and recoverability.
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 (O-18) and water chemistry were analyzed for the period ranging from 2016 to 2019, and tritium (T) and carbon-14 (C-14) 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 8D and delta O-18 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 elastic 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.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available