Abstract
At present, water pollution is still a serious problem in some parts of China. Clean water corridor technology (which provides water quality assurance and pollution load reduction from the Major Science and Technology Program for Water Pollution Control and Treatment) is a river pollution control and treatment measure. However, due to the differences of specific river conditions, it is not initially clear which technology can be used to obtain the best effect. Numerical simulation can address this issue. The results can be used as the basis for selecting clean water corridor technology. Combined with remote sensing (RS) and geographic information system (GIS) technology, the relationship between land use and non-point source pollution load was analyzed by using the HSPF (Hydrological Simulation Program-Fortran) model. According to the distribution of pollution load, the effect of the clear water corridor technology and its combination scenario on the reduction of non-point source pollution in the basin was simulated, and the best clear water corridor technology scheme for the control of non-point source pollution was identified. Research results show that from 2015 to 2018, the non-point source pollution load of total nitrogen in the Paihe River basin showed an overall increasing trend, while the total phosphorus showed a slightly increasing trend. Agricultural land and construction land accounted for 70% and 20%, respectively, of the non-point source pollution load, and the change in land use played an important role in the load of non-point source pollution. In terms of spatial distribution, the non-point source pollution of total nitrogen and total phosphorus was mainly concentrated in the downstream region and the central region. The non-point source pollution load reduction rates of total nitrogen and total phosphorus by the three types of clean water corridor technologies of vegetation buffer zones, permeable sidewalks and constructed wetlands, and their combinations were 15.29% and 15.03%, 11.93% and 11.48%, 8.96% and 8.67%, and 24.12% and 23.20%, respectively. It is necessary to comprehensively adopt clean water corridor technology for an optimal allocation and reasonable layout and to increase the pollution load reduction rate to further achieve ecological environment restoration goals.
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Acknowledgments
This work was supported by the fund of “Clear water corridor technology standardization and industrial promotion mode construction” of Anhui Provincial Environmental Science Research Institute [No: 2017ZX07603-004-04, 2017], a sub-project of “Major Science and Technology Program for Water pollution control and Treatment,” Ministry of Ecology and Environment. We would like to thank the environmental monitoring station in Feixi county, Anhui province. We would also like to thank Dr. Yanjun Dong and Ms. Jiangli Zheng of the Pearl River Hydraulic Research Institute for their technical guidance with the HSPF software. We would also like to thank Ms. Xiang Li for her translation.
Funding
This work was supported by the fund of “Clear water corridor technology standardization and industrial promotion mode construction” of Anhui Provincial Environmental Science Research Institute [No: 2017ZX07603-004-04, 2017], a sub-project of “Major Science and Technology Program for Water pollution control and Treatment,” Ministry of Ecology and Environment.
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Jichun Chen utilized the HSPF model to simulate in this case study, Kangxi Sun analyzed and interpreted the data regarding the Paihe River basin, Liu Zhang performed the hydrological experiment, and Wenzhi Cao made suggestion about the scenario setting of clear water corridor technology. Huatai Liu was a major contributor in writing the manuscript. All authors read and approved the final manuscript.
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Highlights
• The HSPF model can be well applied to the Paihe river basin Chaohu Lake.
• Agricultural land is the highest contribution rate of non-point source pollution.
• The combination of vegetation buffer zone, permeable pavement, and constructed wetland has the best reduction rate of non-point source pollutants.
• Reasonable combination design of clear water corridor technology should be carried out before comprehensive basin management.
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Liu, H., Chen, J., Zhang, L. et al. Simulation effects of clean water corridor technology on the control of non-point source pollution in the Paihe River basin, Chaohu lake. Environ Sci Pollut Res 28, 23534–23546 (2021). https://doi.org/10.1007/s11356-020-12274-x
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DOI: https://doi.org/10.1007/s11356-020-12274-x