Influence of Different Single Factors on the Spatial-Temporal Distribution Law of Phosphorus in the Generalized River

Pengjie Hu, Jin Xu, Lingling Wang, Hongwu Tang, Mengtian Wu and Pengcheng Xu
Additional contact information
Pengjie Hu: State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing 210098, China
Jin Xu: State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing 210098, China
Lingling Wang: State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing 210098, China
Hongwu Tang: State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing 210098, China
Mengtian Wu: State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing 210098, China
Pengcheng Xu: State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing 210098, China

Sustainability, 2022, vol. 14, issue 4, 1-21

Abstract: Phosphorus is the main limiting factor in river eutrophication, whose distribution law is affected by sediment and hydrodynamics. Based on the sediment of Wujiadu Hydrological Station in the middle reaches of the Huaihe River, a physical experiment of phosphorus adsorption onto sediment in a dynamic environment was carried out in this paper to obtain two important parameters of the water quality model. By considering the effect of adsorption and desorption, diffusion, sedimentation and suspension, a numerical model of a three-dimensional periodic flume was established, verified and then applied to the generalized river according to the shape of the cross section in the Bengbu reach of the Huaihe River. The spatial-temporal distribution law of phosphorus was obtained with different single inflow factors. When DP or AP changed, the overall trend of downstream DP was consistent with that of incoming DP / AP ; however, it became more complex when SS or Q changed, which aggravated the sedimentation and re-suspension process. When incoming DP changed, D P max decreased with the distance, while when incoming AP or SS changed, D P max increased at first and then decreased. The relationship between Δ D P max and Δ T P in was fitted into a straight line with a slope of 0.9951, while it was 0.2154 with the change of incoming SS. The effect of the not-constant time of the inflow on the peak concentration of phosphorus along the river was much weaker than that of the peak concentration.

Keywords: generalized river; phosphorus; spatial-temporal distribution; different single factors (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2071-1050/14/4/2070/pdf (application/pdf)
https://www.mdpi.com/2071-1050/14/4/2070/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:14:y:2022:i:4:p:2070-:d:747276

Access Statistics for this article

Sustainability is currently edited by Ms. Alexandra Wu

More articles in Sustainability from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().