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Process-based modeling to reveal spatio-temporal variations of coastal wetland-mediated nutrient removal
Marine Pollution Bulletin ( IF 5.3 ) Pub Date : 2024-11-11 , DOI: 10.1016/j.marpolbul.2024.117258 Qiaofeng Ma, Shuxiu Liang, Jiawen Sun, Zhenhua Wang, Wenhao Hou, Zhaochen Sun, Bijin Liu, Wenguo Huang
Marine Pollution Bulletin ( IF 5.3 ) Pub Date : 2024-11-11 , DOI: 10.1016/j.marpolbul.2024.117258 Qiaofeng Ma, Shuxiu Liang, Jiawen Sun, Zhenhua Wang, Wenhao Hou, Zhaochen Sun, Bijin Liu, Wenguo Huang
Nutrient pollution intensifies the strain on coastal ecosystems globally. Despite wetlands' significant nutrient removal potential, process-based assessments of nutrient removal in large-scale coastal wetlands face limitations that hinder accurate quantification of water quality improvements. This study proposes a novel quantitative approach by developing a coupled hydrodynamic-water quality-wetland biogeochemical model. The spatio-temporal distributions of water-sediment-vegetation nutrients in a coastal wetland and bay were simulated over an annual cycle, with model parameters and results calibrated and validated through field investigations and laboratory experiments. The findings show distinct spatio-temporal characteristics of nutrient pollutant reduction in coastal wetlands. In the Liaohe estuarine tidal wetland, a large-scale coastal wetland in China, nitrogen and phosphorus reduction fluxes reached 1184 t·yr−1 and 53 t·yr−1 , accounting for 19 % and 12 % of the river's fluxes to the sea, respectively. These results underscore the critical function of coastal wetlands in mitigating coastal nutrient pollution. This study presents a novel framework for quantifying coastal water quality improvements by wetlands on a larger scale.
更新日期：2024-11-11
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