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沿岸地下水排放通量 被引量:3

Groundwater discharge in coastal zones
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摘要 海岸带地区,陆源物质由近岸向沿岸海洋输送的途径有很多,而在一些海岸或海湾,其中较普遍的一个过程就是海底地下水排放。它是发生在沿岸地区与毗邻海洋之间的又一个重要的陆海相互作用过程。目前,通过水文、直接测量和地球化学示踪法研究地下水排放的例子有很多,但对其进行定量估算仍面临着许多困难。本文主要介绍镭同位素地球化学示踪法的基本原理及应用,以海南东北部沿岸水域中镭同位素数据为例,计算得到相应的地下水排放通量为5.4×10-4dm3/(d.cm2)。 Submarine groundwater discharge (SGD) is an important process of land-ocean interaction in coastal zones and adjacent sea areas. It serves as a pathway for terrestrial substance, especially land-nutrients and pollutants, to the coastal ocean. Generally speaking, the groundwater discharge can be estimated by: (1) hydrological calculation ; (2) direct measurement ; (3) geochemical tracing. In the present paper, the geochemical tracing of radium isotopes for the estimation of groundwater discharge is mainly discussed. By using this method, the data of radium isotope in the northeast coast of Hainan are examined and the corresponding groundwater discharge flux is estimated 0.015dm3 (d· cm^2 ).
出处 《水文地质工程地质》 CAS CSCD 北大核心 2009年第3期45-50,共6页 Hydrogeology & Engineering Geology
基金 上海市重大项目(07DJ14003) 科技部中德合作项目(2007DFB20380) 国家自然科学基金资助项目(40806035)
关键词 陆源物质 海底地下水排放 地球化学示踪法 镭同位素 terrestial substance submarine groundwater discharge geochemical tracing radium isotope
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参考文献32

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二级参考文献79

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