Modeling the water use associated with energy consumption changes on saltwater intrusion in the Pearl River estuary, China

Yilin Chen, Zhihao Xu, Qian Dong, Wenjie Fan and Zhifeng Yang

Applied Energy, 2024, vol. 372, issue C, No S0306261924011383

Abstract: The intrusion of saline tide into estuaries is one of the major environmental issues impedding the regional development of the Pearl River Estuary, which has been exacerbated by increasing water use associated with energy consumption in the estuary areas. However, the relationship among water use, energy consumption and saltwater intrusion remains ambiguous. Firstly, this paper established a k-nearest neighbor model that identified the correlation between inputs of precipitation and sectoral energy consumption and output of runoff in the Humen Channel as part of the Pearl River Estuary during 2019–2020. Then, the Finite–Volume Community Ocean Model (FVCOM) was employed to explore the process-based mechanism between runoff and salinity via three scenarios simulated for the periods 2030–2031 and 2060–2061 with different water use and precipitation levels. Finally, the impacts of sectoral energy consumption on saltwater intrusion under the different scenarios were analyzed. The results showed that the increase of the energy consumption was positively correlated to runoff, especially in the wet season of Humen Channel. The monthly average salinity exhibited remarkable seasonal variations with similar trends under three scenarios. Totally 654 days with salinity exceeding the standard were projected to take place in the downstream of Humen Channel during the simulation period.

Keywords: Saltwater intrusion; Sectoral energy consumption; FVCOM model; Pearl River estuary (search for similar items in EconPapers)
Date: 2024
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DOI: 10.1016/j.apenergy.2024.123755

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