摘要
为了量化胶州湾东北海岸带的海底地下水排泄量和评价通过海底地下水排泄输入的营养盐数量,分别于2011年10月和2012年5月在胶州湾北岸东大洋码头附近对海水中的222 Rn进行了48h连续测量.通过构建测量点海水中222 Rn质量平衡模型,计算得到海底地下水排泄速率平均值分别为6.38cm/d和8.29cm/d;实际观测到的海底地下水排泄速率变动较大,其主要控制因素是降水量、潮汐和波浪.根据海底地下水排泄速率,获得地下水输入的DIN(溶解无机氮)为47.0×103 mol/d(2011年10月)和48.6×103 mol/d(2012年5月),可溶性SiO2为15.5×103 mol/d(2011年10月)和17.3×103 mol/d(2012年5月),DIP(溶解性磷酸盐)为0.6×103 mol/d(2012年5月),地下水对胶州湾的营养盐输入具有重要贡献.
The aim of this paper is to quantify submarine groundwater discharge（SGD）into the northeast coast of Jiaozhou Bay,then estimate the SGD-derived nutrient fluxes.At Dongdayang dock located at the north shoreline of Jiaozhou Bay,the author deployed one in-situ 48hcontinuous experiment for measuring 222 Rn activity in seawater,in October 2011and May 2012,respectively.Through establishing 222 Rn mass balance model at the observing site,the average SGD rates are assessed to be 6.38cm/d for October 2011and 8.29cm/d for May 2012.Measured results show the SGD rates fluctuate greatly,daily and seasonally,which are mainly controlled by precipitation,tidal pump and wave oscillation.Based on the SGD rates,the SGD-derived nutrient fluxes are calculated to be 47.0×103-48.6×103 mol/d for DIN（dissolved inorganic nitrogen）,15.5×10317.3×103 mol/d for the soluble SiO2,and 0.6×103 mol/d for DIP（dissolved inorganic phosphorus）,respectively.These SGDderived nutrient fluxes contribute to the eutrophication in Jiaozhou Bay to a certain degree which need due attention.
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
2013年第5期1073-1080,1090,共9页
Earth Science-Journal of China University of Geosciences
基金
国家自然科学基金项目(No.41072174)
关键词
海底地下水排泄
222Rn
营养盐
胶州湾
海洋地质
submarine groundwater discharge
radon-222
nutrients
Jiaozhou Bay
submarine geology.
作者简介
郭占荣（1965-），男，博士，教授，从事海岸带水文地质和海洋地质研究．E-mail：gzr@xmu．edu．cn
