Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 634, Issue -, Pages 205-213Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.scitotenv.2018.03.266
Keywords
Stable isotope; Mass balance method; delta O-18 and delta D; Density currents; Pollution control; Three Gorges Reservoir
Categories
Funding
- National Natural Science Foundation of China [51509086, 91647207]
- Natural Science and Technology Major Special Program of China [2014ZX07104005]
- National Key R & D Project of China [2016YFC0402204, 2016YFC0401702]
Ask authors/readers for more resources
Eutrophication has become a severe environmental problem in some tributaries of the Three Gorges Reservoir (TGR) in China. A two-year field investigation of nutrients, oxygen stable isotopes (delta O-18), and hydrogen stable isotopes (delta D) was performed from January 2010 to December 2011 to determine the sources of nutrients in Xiangxi Bay (XXB). The results showed that nitrogen, phosphorus and silicon varied seasonally depending on hydrodynamic changes. The bottom-layer intrusive density current decreased nitrogen and silicon concentrations and increase phosphorus concentrations in XXB, while the middle-layer intrusive density current increased nitrogen and silicon concentrations and decrease phosphorus concentrations. The differences in delta O-18 and delta D among the Yangtze River (YR), XXB and the region upstream of XXB were significant, and according to the tracer method, the estimated contribution ratios of nitrogen, phosphorus and silicon from the YR to XXB were much larger than those from the region upstream of XXB. These findings suggest that water quality in the TGR can be improved by reducing the pollution load throughout the upstream basin of the YR but not through decentralized efforts in only one or two tributary basins. (C) 2018 Elsevier B.V. All rights reserved.
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