Effect of submarine groundwater discharge on nutrient distribution and eutrophication in Liaodong Bay, China

Luo，Manhua1; Zhang，Yan2; Xiao，Kai1; Wang，Xuejing3; Zhang，Xiaolang4; Li，Gang1; Li，Hailong1,2

2023-12-01

10.1016/j.watres.2023.120732

Water Research   影响因子和分区

0043-1354

1879-2448

Driven by the anthropogenic activities associated with coastal settlements, eutrophication has become a global issue. Submarine groundwater discharge (SGD) is a significant continuous pathway for transporting nutrients from land to coastal waters, but its influence on eutrophication in Liaodong Bay (LDB) has received limited attention. In this study, radium isotopes and nutrient data from coastal waters were analyzed to evaluate the SGD flux and its implications for potential eutrophication in LDB. We found that the mean concentrations of dissolved inorganic nitrogen (DIN), phosphorous (DIP), and silicate (DSi) in groundwater were higher than those of seawater and river water. Based on Ra and Ra mass balance models, the SGD fluxes were estimated to be (0.53–2.03) × 10 m/d, of which the fresh SGD accounted for 4 %–15 %. SGD is a vital invisible source of nutrients, contributing more than 79 % of the total inputs of DIN, DIP, and DSi into LDB. With high DIN/DIP ratios (average=85.8) and large nutrient inputs, SGD may significantly drive the phosphorus limitation and eutrophication in LDB. This study shows that SGD-derived nutrient fluxes should be considered in the assessment of water eutrophication for the formulation of future environmental management protocols in coastal systems.

Nutrients Radium mass balance model Submarine groundwater discharge Water eutrophication

SCI ; EI

英语

NI论文

第一

WOS:001112136100001

20234615044486

Digital storage ; Discharge (fluid mechanics) ; Environmental management ; Groundwater ; Nutrients ; Radium ; Silicates ; Submarines

Groundwater:444.2 ; Environmental Engineering, General:454.1 ; Environmental Impact and Protection:454.2 ; Radioactive Materials, General:622.1 ; Combat Naval Vessels:672.1 ; Data Storage, Equipment and Techniques:722.1

ENVIRONMENT/ECOLOGY

2-s2.0-85176118277

Scopus

1.State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control,School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.MOE Key Laboratory of Groundwater Circulation and Environment Evolution,School of Water Resources and Environment,China University of Geosciences (Beijing),Beijing,100083,China
3.Institute of Surface-Earth System Science,School of Earth System Science,Tianjin University,Tianjin,300072,China
4.Department of Geosciences,Florida Atlantic University,Boca Raton,33431,United States

Luo，Manhua,Zhang，Yan,Xiao，Kai,et al. Effect of submarine groundwater discharge on nutrient distribution and eutrophication in Liaodong Bay, China[J]. Water Research,2023,247.

Luo，Manhua.,Zhang，Yan.,Xiao，Kai.,Wang，Xuejing.,Zhang，Xiaolang.,...&Li，Hailong.(2023).Effect of submarine groundwater discharge on nutrient distribution and eutrophication in Liaodong Bay, China.Water Research,247.

Luo，Manhua,et al."Effect of submarine groundwater discharge on nutrient distribution and eutrophication in Liaodong Bay, China".Water Research 247(2023).