Abstract
Based on continuous turbidity values (T) and water quality modeling, one methodology was proposed to estimate phosphorus (P) flux into the sea through the river. There are three steps in the procedure: (1) analyzing the relationship of P and total suspended solid (TSS), TSS and T; (2) estimating P concentrations with high temporal and spatial density along the river; and (3) calculating the amount of phosphorus flux into the sea. From September 2014 to December 2016, 224 data sets were collected at eight sites along the Tonglv River which feeds into the Yellow Sea, China. The linear regression of TSS and T provided a fit with R2 = 0.944, and TP and TSS presented linear relationship with R2 = 0.884. It was estimated that about 30,227 kg total phosphorus (TP) flows from the river into the sea from September 2014 to August 2015. It is practicable and credible to use T values and water quality modeling to estimate the process of phosphorus flux. Besides, the procedure proposed could be also applied in analyzing the influence on TP fluxes brought by pollution loading changes. Thus, to facilitate long-term pollutants’ fluxes estimation, combining the regression models with water quality modeling might be an effective technique.
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This work was sponsored by the National Natural Science Foundation of China (41501601), the Natural Science and Technology Project of Nantong (MS12018035), and the doctoral research start-up fund of Nantong University (15B01).
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Yao, H., Ni, T. & Zhang, T. Estimation of phosphorus flux into the sea through one reversing river using continuous turbidities and water quality modeling. Environ Dev Sustain 22, 4251–4265 (2020). https://doi.org/10.1007/s10668-019-00382-9
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DOI: https://doi.org/10.1007/s10668-019-00382-9