Dynamic influence of land reclamation on the nitrate contamination and saltwater redistribution

Zheng, Tianyuan; Gao, Shaobo; Liu, Tao; Meng, Qing-Hao; Zheng, Xilai; Walther, Marc; Lu, Chunhui

doi:10.1016/j.scitotenv.2023.163605

Cited by 6 publications

(2 citation statements)

References 32 publications

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“…21,22 Additionally, the majority of researchers have focused on exploring the impacts of land reclamation on coastal groundwater systems. 23 Guo et al found that after land reclamation, the groundwater level in the reclamation area initially increased and gradually influenced the original aquifer. 24 Building on this observation, Hu et al further investigated the transient analytical solution of groundwater flow caused by land reclamation.…”

Section: Introductionmentioning

confidence: 99%

“…Land reclamation changes the original topography of the island, and the reclamation area can serve as an additional aquifer to receive freshwater recharge . Past studies have focused on investigating the effects of various factors such as aquifer characteristics, , aquifer spatial heterogeneity, , rainfall infiltration recharge, , sea level rise, , and groundwater overabstraction. , Additionally, the majority of researchers have focused on exploring the impacts of land reclamation on coastal groundwater systems . Guo et al found that after land reclamation, the groundwater level in the reclamation area initially increased and gradually influenced the original aquifer .…”

Section: Introductionmentioning

confidence: 99%

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Time Scale of the Formation of Fresh Groundwater Lens on an Atoll Island under the Influence of Land Reclamation

Meng,

Zheng,

Zheng

et al. 2024

ACS EST Water

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For atolls, fresh groundwater lens (FGL) represents a crucial resource. Land reclamation is a common way of expanding the FGL. However, few studies have examined the effects of land reclamation on the FGL on the time scale. In this study, we are the first to quantify the effect of land reclamation on the time scale of dynamic processes in FGL. It was found that reclamation length and thickness had a much greater effect on fresh groundwater volume and lens stabilization time than the hydraulic conductivity of filling materials. Specifically, the fresh groundwater volume increased 1.18 times, and the lens stabilization time increased 1.12 times for every 1.67-fold increase in reclamation length. Furthermore, enhancing reclamation thickness from 1 to 12 m notably extended the lens stabilization time from over 15 to 46 years. Meanwhile, the effect on fresh groundwater volume diminished with an increasing reclamation length and thickness. Thus, extensive reclamation on atolls may not yield the expected outcomes, leading to high reusability and time costs. This work provides insights into the effects of land reclamation on FGL and evaluates these effects in terms of time. This valuable insight can guide the use of land reclamation to obtain more freshwater resources in a shorter period.

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