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Proc. IAHS, 379, 323-333, 2018
https://doi.org/10.5194/piahs-379-323-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Pre-conference publication
05 Jun 2018
Distributed source pollutant transport module based on BTOPMC: a case study of the Laixi River basin in the Sichuan province of southwest China
Hongbo Zhang1, Tianqi Ao2, Maksym Gusyev3, Hiroshi Ishidaira4, Jun Magome4, and Kuniyoshi Takeuchi4 1Faculty of Electric Power Engineering, Kunming University of Science and Technology, Kunming 650500, China
2College of Water Resources and Hydropower, Sichuan University, Chengdu 610065, China
3International Centre for Water Hazard and Risk Management (ICHARM), Public Works Research Institute (PWRI), Tsukuba 305-8516, Japan
4International Research Center for River Basin Environment, University of Yamanashi, Kofu 400-8511, Japan
Abstract. Nitrogen and phosphorus concentrations in Chinese river catchments are contributed by agricultural non-point and industrial point sources causing deterioration of river water quality and degradation of ecosystem functioning for a long distance downstream. To evaluate these impacts, a distributed pollutant transport module was developed on the basis of BTOPMC (Block-Wise Use of TOPMODEL with Muskingum-Cunge Method), a grid-based distributed hydrological model, using the water flow routing process of BTOPMC as the carrier of pollutant transport due a direct runoff. The pollutant flux at each grid is simulated based on mass balance of pollutants within the grid and surface water transport of these pollutants occurs between grids in the direction of the water flow on daily time steps. The model was tested in the study area of the Lu county area situated in the Laixi River basin in the Sichuan province of southwest China. The simulated concentrations of nitrogen and phosphorus are compared with the available monthly data at several water quality stations. These results demonstrate a greater pollutant concentration in the beginning of high flow period indicating the main mechanism of pollution transport. From these preliminary results, we suggest that the distributed pollutant transport model can reflect the characteristics of the pollutant transport and reach the expected target.
Citation: Zhang, H., Ao, T., Gusyev, M., Ishidaira, H., Magome, J., and Takeuchi, K.: Distributed source pollutant transport module based on BTOPMC: a case study of the Laixi River basin in the Sichuan province of southwest China, Proc. IAHS, 379, 323-333, https://doi.org/10.5194/piahs-379-323-2018, 2018.
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Short summary
During my study period from master to doctor, I have been studying in the field of water resources and hydrology and water quality. Especially in my doctor-study period, I would like to develop a non-point source pollution model based on the BTOPMC model and I did it successfully although the model is so simple that its performance is not good. This experience makes me start my period of combining the hydrological model with water quality and I think I will continue the work in this area.
During my study period from master to doctor, I have been studying in the field of water...
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