Using 222Rn to estimate submarine groundwater discharge (SGD) and the associated nutrient fluxes into Xiangshan Bay, East China Sea.
Using 222Rn to estimate submarine groundwater discharge (SGD) and the associated nutrient fluxes into Xiangshan Bay, East China Sea.
复制标题
DOI：
10.1016/j.marpolbul.2013.05.024
复制
发表时间：
2013-08
影响因子：
5.8
通讯作者：
Zijun Wu-;Huaiyang Zhou;Shuai Zhang;Yang Liu
中科院分区：
文献类型：
--
作者：
Zijun Wu-;Huaiyang Zhou;Shuai Zhang;Yang Liu
在东海象山湾与海岸线垂直距离不同的A站和B站进行了氡（222Rn）连续监测。基于222rn平衡模型（沿海水域中222rn的各种来源和汇），估算A点和B点的SGD平均速率分别为0.69 cm/d和0.23 cm/d。地下水养分分析结果表明，通过SGD途径的相关养分通量负载，DIN为4.27 × 106mol/d， DIP为2.24 × 104mol/d， DSi为1.82 × 106mol/d，与当地河流中观测到的水平相当甚至更高。因此，在该地区富营养化控制过程中，应充分重视SGD作为一种营养来源的重要性。
Continuous radon (222Rn) 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 a222Rn balance model (various sources and sinks of222Rn 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 × 106mol/day for DIN, 2.24 × 104mol/day for DIP and 1.82 × 106mol/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.