中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
A novel tool for tracing water sources of streamflow in a mixed land-use catchment

文献类型:期刊论文

AuthorSun, Zhi-Xiang2,3; Cui, Jun-Fang3; Cheng, Jian-Hua1; Tang, Xiang-Yu1
SourceSCIENCE OF THE TOTAL ENVIRONMENT
Issued Date2024-02-20
Volume912Pages:13
KeywordDissolve organic matter Fluorescence Water source Tracer Catchment Land -use
ISSN0048-9697
DOI10.1016/j.scitotenv.2023.168800
English Abstract

Tracing water sources of streamflow in a mixed land-use catchment is critical for predicting pollutant emissions from various human activities to streams but remains a major challenge. A rain event based field monitoring study was conducted in the Jieliu catchment located in the hilly area of central Sichuan Province, southwest China. The ratio of the maximum fluorescence intensities (Fmax) of the two humic-like dissolved organic matter (DOM) components at excitation/emission wavelengths of 255 (315)/415 nm (component 1; C1) and 260 (375)/ 480 nm (component 2; C2) was proposed as a tracer for quantifying streamflow water sources. Satisfactory performance of using the Fmax(C1)/Fmax(C2) ratio in hydrograph separation of streamflow at the outlet of a forest sub-catchment was verified by through comparison with the hydrograph separation results based on delta 18O data. The Fmax(C1)/Fmax(C2) ratio was then applied to estimate the contributions of rainwater and pre-event water sources under different land use types to the streamflow in an agro-forest sub-catchment and the entire catchment. The hydrograph separation results using the Fmax(C1)/Fmax(C2) ratio can be used to support the optimization of water resource management and the quantification of pollutant loadings from major water sources to streams at the catchment scale.

WOS KeywordDISSOLVED ORGANIC-MATTER ; STABLE-ISOTOPES ; FLUORESCENCE SPECTROSCOPY ; ARTIFICIAL SWEETENER ; SLOPING FARMLAND ; MULTI-TRACER ; WASTE-WATER ; TRANSPORT ; QUALITY ; RIVER
Funding ProjectNational Natural Science Foundation of China[42177379] ; National Natural Science Foundation of China[42007361] ; ZAFU Scientific Research Development Foun-dation[2020FR040] ; ZAFU Scientific Research Development Foun-dation[2021LFR045]
WOS Research AreaEnvironmental Sciences & Ecology
Language英语
WOS IDWOS:001129963600001
PublisherELSEVIER
Funding OrganizationNational Natural Science Foundation of China ; ZAFU Scientific Research Development Foun-dation