Submarine groundwater discharge in a coastal bay: Evidence from radon investigations

Luo，Manhua1,2; Zhang，Yan1,2; Li，Hailong1,2,3; Wang，Xuejing3; Xiao，Kai3

2020-09-01

10.3390/w12092552

Water   影响因子和分区

2073-4441

2073-4441

Jiaozhou Bay, an urbanized coastal bay located in the southern part of Shandong Peninsula, China, has been deeply affected by anthropogenic activities. Here, the naturally occurring Rn isotope was used as a tracer to assess the submarine groundwater discharge (SGD) in this bay. The time series of Rn concentrations in nearshore seawater were monitored continuously over several tidal cycles at two fixed sites (Tuandao (TD) and Hongdao (HD)) during the dry season in spring and the wet season in autumn of 2016. Rn concentrations in seawater were negatively related to the water depth, indicating the influence of tidal pumping. A Rn mass balance model revealed that the mean SGD rates were 21.9 cm/d at TD and 17.8 cm/d at HD in the dry season, and were 19.5 cm/d at TD and 26.9 cm/d at HD in the wet season. These rates were about 8-14 times the discharge rates of the local rivers. Enhanced groundwater inputs occurred at HD in the wet season, likely due to the large tidal amplitudes and the rapid response to local precipitation. Large inputs of SGD may have important influences on nutrients levels and structure, as well as the water eutrophication occurring in coastal waters.

222Rn Jiaozhou Bay Mass balance model Submarine groundwater discharge

SCI ; EI

英语

其他

China Postdoctoral Science Foundation[2020M670399]

Water Resources

Water Resources

WOS:000586452600001

MDPI

20203809200137

Discharge (fluid mechanics) ; Submarines ; Drought ; Eutrophication ; Groundwater ; Seawater

Precipitation:443.3 ; Water Resources:444 ; Groundwater:444.2 ; Seawater, Tides and Waves:471.4 ; Radioactive Materials, General:622.1 ; Combat Naval Vessels:672.1 ; Chemical Products Generally:804

2-s2.0-85090984783

Scopus

1.MOE Key Laboratory of Groundwater Circulation and Environment Evolution,School of Water Resources and Environment,China University of Geosciences (Beijing),Beijing,100083,China
2.State Key Laboratory of Biogeology and Environmental Geology,China University of Geosciences (Beijing),Beijing,100083,China
3.Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control,School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Luo，Manhua,Zhang，Yan,Li，Hailong,et al. Submarine groundwater discharge in a coastal bay: Evidence from radon investigations[J]. Water,2020,12(9).

Luo，Manhua,Zhang，Yan,Li，Hailong,Wang，Xuejing,&Xiao，Kai.(2020).Submarine groundwater discharge in a coastal bay: Evidence from radon investigations.Water,12(9).

Luo，Manhua,et al."Submarine groundwater discharge in a coastal bay: Evidence from radon investigations".Water 12.9(2020).