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Title: Estimating submarine groundwater discharge in the Jiaozhou Bay using radium isotopes
Authors: Yuan, Xiaojie
Guo, Zhanrong
Li, Wenquan
Liu, Jie
Ma, Zhiyong
Wang, Bo
Keywords: Submarine groundwater discharge;Radium isotope;Groundwater;Nutrient;Jiaozhou bay
Issue Date: Oct-2014
Publisher: NISCAIR-CSIR, India
Abstract: Submarine groundwater discharge (SGD) is part of the global water cycles, which delivers a large amount of solutes to the biogeochemical cycle and affects the coastal ecological environment. Natural radium isotopes (224Ra and 226Ra) were used to estimate the SGD in Jiaozhou Bay and the mass balance models were established.  Radium sources including river transport, sediment diffusion, desorption from re-suspended particles, open sea flood tide, municipal wastewater, and SGD are considered. Radium output owning to the radioactive decay and ebb tide are also considered. Our results show the SGD fluxes during September to October in 2011(autumn) and April to May in 2012 (spring) are 15.17 and 6.53×106 m3·d-1, respectively. In the same period of time, the input of the dissolved inorganic nitrogen (DIN) from SGD is very close to that from river, yet, the soluble silicate and reactive phosphate vary seasonally. SGD is the major source of the nutrient input of Jiaozhou Bay.
Page(s): 1811-1819
ISSN: 0975-1033 (Online); 0379-5136 (Print)
Appears in Collections:IJMS Vol.43(10) [October 2014]

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