Influences of carbonate weathering and hyporheic exchange on carbon fluxes in Pearl River Basin, China

Gu, Chao; Liu, Yi; Qi, Hongkai; Lu, Mengqian

doi:10.1016/j.watres.2024.122014

Water Research

2024

DOI: 10.1016/j.watres.2024.122014

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Influences of carbonate weathering and hyporheic exchange on carbon fluxes in Pearl River Basin, China

Chao Gu,

Yi Liu,

Hongkai Qi

et al.

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Cited by 3 publications

References 78 publications

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Spatiotemporal changes and driving mechanism of ecosystem carbon sink in karst peak cluster depression basin in Southwest Guangxi based on the interaction of “water-rock-soil-air-biology”

Huang,

Tian,

Zhang

et al. 2024

Ecological Informatics

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Spatiotemporal changes and driving mechanism of ecosystem carbon sink in karst peak cluster depression basin in Southwest Guangxi based on the interaction of “water-rock-soil-air-biology”

Huang,

Tian,

Zhang

et al. 2024

Ecological Informatics

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The hyporheic exchange remarkably influences methane dynamics and effluxes in rivers

Gu,

Lu,

Liu

2025

Journal of Hydrology

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Patterns and Drivers of CO₂ and CH₄ Fluxes in an Urbanized River Network and Their Response to Restoration

Li,

Yan

2024

JGR Biogeosciences

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Carbon evasion from urban river networks becomes increasingly significant as urbanization accelerates. However, there remains a limited understanding of the overall carbon emission impact integrating CO2 and CH4 dynamics, particularly in response to ecological restoration efforts. In this study, we investigated patterns of fluvial CO2 and CH4 diffusive fluxes across an urban river network in Wuxi, China. Our results reveal that water quality variables, especially dissolved oxygen (DO) and phosphorus content, predominantly influence the variability of carbon emissions. These factors exhibit a stronger correlation with CO2 emissions compared to CH4, indicating a net increase in carbon emissions as water quality deteriorates. Seasonally, higher water temperatures, phosphate levels, and lower DO concentrations lead to increased carbon emissions during summer months. Spatially, areas with lower carbon emissions (averaged 86 mmol m−2 d−1 CO2 and 0.13 mmol m−2 d−1 CH4) are primarily situated near the lake and in river sections where significant water quality improvements have been achieved through ecological restoration efforts. Cluster analysis shows that over 60% of high‐carbon emission (averaged 162 mmol m−2 d−1 CO2 and 1.21 mmol m−2 d−1 CH4) sites in the study area have undergone ecological restoration, suggesting potential for further carbon emission reduction through enhanced restoration practices. Our findings underscore the importance of implementing carbon reduction strategies such as nutrient removal and aeration for oxygenation within water ecological restoration initiatives. Effective matching of restoration strategies holds further potential for mitigating carbon emissions from urban river networks.

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Influences of carbonate weathering and hyporheic exchange on carbon fluxes in Pearl River Basin, China

Cited by 3 publications

References 78 publications

Spatiotemporal changes and driving mechanism of ecosystem carbon sink in karst peak cluster depression basin in Southwest Guangxi based on the interaction of “water-rock-soil-air-biology”

Spatiotemporal changes and driving mechanism of ecosystem carbon sink in karst peak cluster depression basin in Southwest Guangxi based on the interaction of “water-rock-soil-air-biology”

The hyporheic exchange remarkably influences methane dynamics and effluxes in rivers

Patterns and Drivers of CO₂ and CH₄ Fluxes in an Urbanized River Network and Their Response to Restoration

Contact Info

Product

Resources

About

Influences of carbonate weathering and hyporheic exchange on carbon fluxes in Pearl River Basin, China

Cited by 3 publications

References 78 publications

Spatiotemporal changes and driving mechanism of ecosystem carbon sink in karst peak cluster depression basin in Southwest Guangxi based on the interaction of “water-rock-soil-air-biology”

Spatiotemporal changes and driving mechanism of ecosystem carbon sink in karst peak cluster depression basin in Southwest Guangxi based on the interaction of “water-rock-soil-air-biology”

The hyporheic exchange remarkably influences methane dynamics and effluxes in rivers

Patterns and Drivers of CO2 and CH4 Fluxes in an Urbanized River Network and Their Response to Restoration

Contact Info

Product

Resources

About

Patterns and Drivers of CO₂ and CH₄ Fluxes in an Urbanized River Network and Their Response to Restoration