title: Using 222Rn to estimate submarine groundwater discharge (SGD) and the associated nutrient fluxes into Xiangshan Bay, East China Sea.
abstract: Continuous radon ((222)Rn) monitoring was conducted at two stations (site A and site B) with different perpendicular distance from the shoreline in Xiangshan Bay, East China Sea. Based on a (222)Rn balance model (various sources and sinks of (222)Rn in coastal water), the average rate of SGD was estimated to be 0.69 cm/day and 0.23 cm/day for site A and site B, respectively. The results from a nutrient analysis of the groundwater indicate that the associated nutrients fluxes loading through the SGD pathway were 4.27×10(6) mol/day for DIN, 2.24×10(4) mol/day for DIP and 1.82×10(6) mol/day for DSi, respectively, which were comparable to or even higher than the levels observed in the local streams. Therefore, adequate attention should be paid to the importance of SGD as one source of nutrients during the eutrophication control process in this area.
authors.affiliation: State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China.
authors.forename: Zijun
authors.initials: Z
authors.lastname: Wu
authors.forename: Huaiyang
authors.initials: H
authors.lastname: Zhou
authors.forename: Shuai
authors.initials: S
authors.lastname: Zhang
authors.forename: Yang
authors.initials: Y
authors.lastname: Liu
mesh_terms: D061006:Bays / Q000737:chemistry*; D002681:China; D004784:Environmental Monitoring / Q000379:methods; D060587:Groundwater / Q000032:analysis* / Q000737:chemistry; D009584:Nitrogen / Q000032:analysis; D010758:Phosphorus / Q000032:analysis; D011886:Radon / Q000032:analysis*; D012623:Seawater / Q000737:chemistry*; D014873:Water Pollutants / Q000032:analysis*
chemical_list: D014873:Water Pollutants; D010758:Phosphorus; D009584:Nitrogen; D011886:Radon
keywords: (222)Rn; Nutrients; Submarine groundwater discharge (SGD); Xiangshan Bay