What does this research mean for the field?

In the Chongqing urban section of the Yangtze River, dissolved inorganic carbon (DIC) dominates the carbon pool, originating primarily from soil CO2 inputs and carbonate weathering, and its dynamics are significantly regulated by reservoir operation and thermal stratification. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To investigate the sources, distribution, and influencing factors of dissolved inorganic carbon in an urban river reservoir during distinct hydrological periods.

September 5, 2026Journal of Environmental Engineering and Science

Dissolved inorganic carbon in Chongqing urban section of Yangtze River, China

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QWQingzheng Wu YQYu Qin ZLZhen Liu

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Overview

Observational study reveals hydrological regulation and thermal stratification drive dissolved inorganic carbon dynamics in urban river waters, highlighting reservoir impacts on inland carbon cycling.

Key Points

To investigate the sources, distribution, and influencing factors of dissolved inorganic carbon in an urban river reservoir during distinct hydrological periods.
Monitored dissolved inorganic carbon (DIC) concentrations and stable carbon isotopes (δ13C-DIC) during low-water and reservoir impoundment periods.
Applied carbon stable isotope tracing and a mass balance model to quantify DIC sources and evaluate the influence of thermal stratification and water chemistry.
Demonstrated that DIC dominates the aquatic carbon pool, primarily originating from soil carbon dioxide inputs and carbonate weathering.
Observed that summer δ13C-DIC correlated negatively with temperature and pCO2 (p < 0.001) and positively with pH and total particulate matter (p < 0.05), alongside a strong negative relationship between DIC concentration and δ13C-DIC in autumn.

Cite This Study

Wu et al. (2026) studied this question.

synapsesocial.com/papers/6a9bd3f16b95aff0620eb216 https://doi.org/10.1680/jenes.25.00147

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September 5, 2026Journal of Environmental Engineering and Science

Dissolved inorganic carbon in Chongqing urban section of Yangtze River, China

View Full Paper

Ask AI

Bookmark

Authors

QWQingzheng Wu YQYu Qin ZLZhen Liu

Discussion

Member takes

Overview

Key Points

To investigate the sources, distribution, and influencing factors of dissolved inorganic carbon in an urban river reservoir during distinct hydrological periods.
Monitored dissolved inorganic carbon (DIC) concentrations and stable carbon isotopes (δ13C-DIC) during low-water and reservoir impoundment periods.
Applied carbon stable isotope tracing and a mass balance model to quantify DIC sources and evaluate the influence of thermal stratification and water chemistry.
Demonstrated that DIC dominates the aquatic carbon pool, primarily originating from soil carbon dioxide inputs and carbonate weathering.
Observed that summer δ13C-DIC correlated negatively with temperature and pCO2 (p < 0.001) and positively with pH and total particulate matter (p < 0.05), alongside a strong negative relationship between DIC concentration and δ13C-DIC in autumn.

Cite This Study

Wu et al. (2026) studied this question.

synapsesocial.com/papers/6a9bd3f16b95aff0620eb216 https://doi.org/10.1680/jenes.25.00147

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