Jiang, Tao
- Institutionen för skogens ekologi och skötsel, Sveriges lantbruksuniversitet
- Southwest University
Sammanfattning
Three-dimensional fluorescence spectroscopy combined with ultraviolet-visible (UV-Vis) absorption spectra was used to investigate the change characteristics of dissolved organic matter (DOM) in confluences water of Qujiang River-Jialing River and Fujiang River-Jialing River, respectively. The results suggested that DOM showed a significant terrestrial input signal in all the sampling sites, FI0.8, possibly representing remarkable signals of humus resulted from humic-like component. Moreover, the mixing zone of this study showed a non-conservative mixed behavior, which had a limited contribution, and was not the dominant factor to interpret the change characteristics of DOM in confluences zones. Different land-use types along all the rivers had an obvious impact on DOM inputs. Results of cluster analysis showed that a higher degree of aromaticity and humification components was observed as the predominant contributor to DOM when the land-use type was forest and farmland ecosystem, for example the confluences of Qujiang River-Jialing River. On the other hand, high concentrations of DOM with relative simple structures were found in the water when the urban land-use type was predominant, for example the confluences of Fujiang River-Jialing River. Meanwhile, a new fluorescent signal of protein-like components (peak T) appeared, which manifested a significant effect on the water quality resulted from anthropogenic activities.
Nyckelord
Dissolved organic matter; Land-use types; River confluences; Three-dimensional fluorescence spectroscopy; Ultraviolet-visible absorption spectra
Publicerad i
Huan Jing Ke Xue
2015, volym: 36, nummer: 3, sidor: 869-878
Utgivare: Science Press
SLU författare
UKÄ forskningsämne
Oceanografi, hydrologi, vattenresurser
Publikationens identifierare
- DOI: https://doi.org/10.13227/j.hjkx.2015.03.016
Permanent länk till denna sida (URI)
https://res.slu.se/id/publ/132043