Study on the Transport of Terrestrial Dissolved Substances in the Pearl River Estuary Using Passive Tracers

doi:10.3390/w12051235

CORC > 深海科学与工程研究所 > 中国科学院深海科学与工程研究所 > 深海科学研究部 > 海洋环流观测与数值模拟研究室

	Study on the Transport of Terrestrial Dissolved Substances in the Pearl River Estuary Using Passive Tracers
	Hong, Bo 1,4; Wang, Guangyu 4; Xu, Hongzhou 2; Wang, Dongxiao 1,3
刊名	WATER
	2020-05-01
卷号	12 期号:5 页码:20
关键词	transport process passive tracers water age terrestrial dissolved substances Pearl River Estuary
DOI	10.3390/w12051235
英文摘要	Highly 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.
资助项目	Key Research Program of Frontier Sciences, CAS[QYZDJ-SSW-DQC022] ; National Natural Science Foundation of China[41976014] ; National Natural Science Foundation of China[51761135021] ; National Natural Science Foundation of China[41666001]
WOS关键词	CHESAPEAKE BAY ; RESIDENCE TIMES ; WATER EXCHANGE ; AGE ; EUTROPHICATION ; DYNAMICS ; SEA ; HYPOXIA ; OXYGEN ; WIND
WOS研究方向	Water Resources
语种	英语
出版者	MDPI
WOS记录号	WOS:000555915200014
资助机构	Key Research Program of Frontier Sciences, CAS ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.idsse.ac.cn/handle/183446/7852]
专题	深海科学研究部_海洋环流观测与数值模拟研究室
通讯作者	Hong, Bo; Xu, Hongzhou
作者单位	1.Southern Lab Ocean Sci & Engn, Zhuhai 519000, Guangdong, Peoples R China 2.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Luhuitou Rd, Sanya 572000, Peoples R China 3.Chinese Acad Sci, State Key Lab Trop Oceanog, South China Sea Inst Oceanol, Guangzhou 510301, Peoples R China 4.South China Univ Technol, Sch Civil & Transportat Engn, Wushan Rd, Guangzhou 510641, Peoples R China
推荐引用方式 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):20.
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),20.
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):20.