Estimating submarine groundwater discharge and associated nutrient inputs into Daya Bay during spring using radium isotopes

Gao, Jing-yan1,2; Wang, Xue-jing2,3; Zhang, Yan4; Li, Hai-long2,4

2018

10.1016/j.wse.2018.06.002

Water Science and Engineering   影响因子和分区

1674-2370

2405-8106

Daya Bay, a semi-enclosed bay in the South China Sea, is well known for its aquaculture, agriculture, and tourism. In recent years, many environmental problems have emerged, such as the frequent (almost yearly) occurrence of harmful algal blooms and red tides. Therefore, investigations of submarine groundwater discharge (SGD) and associated nutrient inputs to this bay have important theoretical and practical significance to the protection of the ecological system. Such a study was conducted using short-lived radium isotopes Ra-223 and Ra-224. The estimated SGD fluxes were 2.89 x 10(7) m(3)/d and 3.05 x 10(7) m(3)/d based on Ra-223 and Ra-224, respectively. The average SGD flux was about 35 times greater than that of all the local rivers. The SGD-associated dissolved inorganic nitrogen (DIN) and dissolved inorganic phosphorus (DIP) fluxes ranged from 1.95 x 10(6) to 2.06 x 10(6) mol/d and from 5.72 x 10(4) to 6.04 x 10(4) mol/d, respectively. The average ratio of DIN to DIP fluxes in SGD was 34, much higher than that in local rivers (about 6.46), and about twice as large as the Redfield ratio (16). Our results indicate that SGD is a significant source of nutrients to the bay and may cause frequent occurrence of harmful algal blooms. This study provides baseline data for evaluating potential environmental effects due to urbanization and economic growth in this region. (c) 2018 Hohai University. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

Submarine groundwater discharge (SGD) Radium isotopes Radium mass balance model SGD-associated nutrient fluxes Daya Bay

ESCI ; EI

英语

通讯

National Natural Science Foundation of China[41430641]

Water Resources

Water Resources

WOS:000441304000004

EDITORIAL BOARD WATER SCIENCE & ENGINEERING

20182905563662

Algae control ; Economics ; Groundwater ; Isotopes ; Nutrients ; Radium ; Submarines

Groundwater:444.2 ; Water Pollution Control:453.2 ; Radioactive Materials, General:622.1 ; Combat Naval Vessels:672.1 ; Social Sciences:971

Web of Science

1.Harbin Inst Technol, Sch Environm, Harbin 150001, Heilongjiang, Peoples R China;
2.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen 518055, Peoples R China;
3.Wuhan Univ, Sch Water Resources & Hydropower Engn, Wuhan 430072, Hubei, Peoples R China;
4.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Beijing 100083, Peoples R China

Gao, Jing-yan,Wang, Xue-jing,Zhang, Yan,et al. Estimating submarine groundwater discharge and associated nutrient inputs into Daya Bay during spring using radium isotopes[J]. Water Science and Engineering,2018,11(2):120-130.

Gao, Jing-yan,Wang, Xue-jing,Zhang, Yan,&Li, Hai-long.(2018).Estimating submarine groundwater discharge and associated nutrient inputs into Daya Bay during spring using radium isotopes.Water Science and Engineering,11(2),120-130.

Gao, Jing-yan,et al."Estimating submarine groundwater discharge and associated nutrient inputs into Daya Bay during spring using radium isotopes".Water Science and Engineering 11.2(2018):120-130.