Nitrate sou rce allocation is important for watershed environmental management.In this paper,59 surface water samples were collected in late July 2022 in the Erhai Basin of the Yunnan-Guizhou Plateau in southwestern C...Nitrate sou rce allocation is important for watershed environmental management.In this paper,59 surface water samples were collected in late July 2022 in the Erhai Basin of the Yunnan-Guizhou Plateau in southwestern China,where the sou rce of nitrate pollution in su rface water is still unknown.The potential sources of nitrate were identified and estimated using hydrochemistry indicators,theδ^(15)N/δ^(18)O-NO_(3)^(-)and the Stable Isotope Analysis in R(SIAR)model.The results showed that the various forms of nitrogen compounds,transport and transformation processes,and their sources in the Erhai Basin were characterized by obvious spatial scale differentiation.展开更多
基金supported by the Yunnan Provincial Basic Research Project-Key Project(no.202201AS070024):Study on the landscape changes and its hydro-ecological environmental effects in the specific agricultural basin of Yunnan Plateauthe Yunnan Provincial Basic Research Project-Major Project(grant no.202201BC070001):Cangshan Comprehensive Scientific Investigation—Sub-project:Cangshan Physical Geography Survey
文摘Nitrate sou rce allocation is important for watershed environmental management.In this paper,59 surface water samples were collected in late July 2022 in the Erhai Basin of the Yunnan-Guizhou Plateau in southwestern China,where the sou rce of nitrate pollution in su rface water is still unknown.The potential sources of nitrate were identified and estimated using hydrochemistry indicators,theδ^(15)N/δ^(18)O-NO_(3)^(-)and the Stable Isotope Analysis in R(SIAR)model.The results showed that the various forms of nitrogen compounds,transport and transformation processes,and their sources in the Erhai Basin were characterized by obvious spatial scale differentiation.
