SCSIO OpenIR  > 热带海洋环境国家重点实验室(LTO)
Study on the Transport of Terrestrial Dissolved Substances in the Pearl River Estuary Using Passive Tracers
Hong, Bo1; Wang, Guangyu; Xu, Hongzhou2; Wang, Dongxiao1,3
2020
Source PublicationWATER
Volume12Issue:5Pages:1235
AbstractHighly populated river deltas are experiencing marine environment degradation resulting from the tremendous input of terrestrial dissolved substances (TeDS). The Pearl River Delta is one of the deltas with degradation of the water quality and ecological condition. The Pearl River Estuary (PRE) was investigated to reveal the fate and transport timescales of TeDS in order to provide guidance on water resource management and pollutant transport prediction. By using passive tracers in a calibrated 3D numerical model, the TeDS transports from five different outlet groups were investigated systematically. The TeDS transport time was computed by using the concept of water age, which is a measure of the time that has elapsed since the tracer was transported from the upstream boundary to the downstream concerned area. The tracer impacted area was defined by the area with tracer concentrations > 0.2 (arbitrary unit). The domains that were impacted by the tracer coming from each outlet group were identified separately. In the wet season, the impacted area was larger than in other seasons. The most prominent variations appeared in the Jiaomen-Hengmen-Hongqili (JHH) and Modaomen (MD) outlets. The hydrodynamic conditions controlled the offshore spreading of the TeDS. Assuming the TeDS were conservative, it took approximately 10-20 days for the TeDS to be transported from the head water to the entrance of the outlet. For the TeDS coming from the head water of the Humen outlet, it took approximately 40 (80) days for the TeDS to be transported out of the mouth of the Lingding Bay during the wet (dry) season. For the case of the TeDS coming from the head water of the JHH outlets, it took approximately 20 (40) days for the TeDS to be transported out of the Lingding Bay during the wet (dry) season. For the MD, Jiti and Yamen-Hutiao outlets, it usually took approximately 10 days for the TeDS to be transported from the head water to the inner shelf. The correlation coefficient between the river flow and tracer concentrations was 0.78, and between the river flow and transport time it was -0.70 at a station in the lower Lingding Bay. At the estuary mouth, the impacts of other forcing fields got stronger.
DepartmentLTO
Keywordtransport process passive tracers water age terrestrial dissolved substances Pearl River Estuary
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/18313
Collection热带海洋环境国家重点实验室(LTO)
Affiliation1.South China Univ Technol, Sch Civil & Transportat Engn, Wushan Rd, Guangzhou 510641, Peoples R China
2.Southern Lab Ocean Sci & Engn, Zhuhai 519000, Guangdong, Peoples R China
3.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Luhuitou Rd, Sanya 572000, Peoples R China
4.Chinese Acad Sci, State Key Lab Trop Oceanog, South China Sea Inst Oceanol, Guangzhou 510301, Peoples R China
Recommended Citation
GB/T 7714
Hong, Bo,Wang, Guangyu,Xu, Hongzhou,et al. Study on the Transport of Terrestrial Dissolved Substances in the Pearl River Estuary Using Passive Tracers[J]. WATER,2020,12(5):1235.
APA Hong, Bo,Wang, Guangyu,Xu, Hongzhou,&Wang, Dongxiao.(2020).Study on the Transport of Terrestrial Dissolved Substances in the Pearl River Estuary Using Passive Tracers.WATER,12(5),1235.
MLA Hong, Bo,et al."Study on the Transport of Terrestrial Dissolved Substances in the Pearl River Estuary Using Passive Tracers".WATER 12.5(2020):1235.
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