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JOURNAL OF MECHANICAL ENGINEERING  > 2020  >  42(10): 37-46.
Wang Yali，Zhang Fenfen，Chen Xiaogang, et al. Influence of submarine groundwater discharge in the blue carbon budget of typical mangrove: A case study from the Zhenzhu Bay, Guangxi[J]. Haiyang Xuebao，2020, 42(10)：37–46 doi: 10.3969/j.issn.0253-4193.2020.10.004
Citation: Wang Yali，Zhang Fenfen，Chen Xiaogang, et al. Influence of submarine groundwater discharge in the blue carbon budget of typical mangrove: A case study from the Zhenzhu Bay, Guangxi[J]. Haiyang Xuebao，2020, 42(10)：37–46 doi: 10.3969/j.issn.0253-4193.2020.10.004
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Influence of submarine groundwater discharge in the blue carbon budget of typical mangrove: A case study from the Zhenzhu Bay, Guangxi

doi: 10.3969/j.issn.0253-4193.2020.10.004
  • Received Date: 09 Jan 2020
  • Rev Recd Date: 13 Feb 2020
  • Publish Date: 07 Dec 2020
    Abstract
  • As one of the forms of land-ocean interactions, submarine groundwater discharge (SGD) can release solutes into the coastal sea and has a significant impact on the nutrients budget in coastal seawater. Here, using 222Rn tracer, the SGD and the associated dissolved inorganic carbon (DIC) and dissolved organic carbon (DOC) inputted to the Zhenzhu Bay, a typical mangrove-dominated bay, were quantified. The results show that the average concentrations of 222Rn, DIC and DOC in groundwater are relatively higher than those in river water and surface sea water. A 222Rn mass balance implies that SGD rate is (0.36±0.36) m/d during January 2019. And SGD-derived DIC and DOC fluxes are estimated to be (2.41±2.63)×107 mol/d and (1.96±2.20)×106 mol/d. It confirmed that SGD-derived carbon is the most important carbon source in this bay, with 91% DIC and 89% DOC of the total input fluxes by SGD, respectively. Our results highlight the importance of groundwater-derived carbon fluxes in the Zhenzhu Bay, especially in the blue carbon assessments and biogeochemical process in tidal zones such as mangrove ecosystems.

     

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