水体-沉积物界面氧通量的产生机理及影响机制

项目名称： 水体-沉积物界面氧通量的产生机理及影响机制

项目编号： No.51478061

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 其他

项目作者： 艾海男

作者单位： 重庆大学

项目金额： 85万元

中文摘要： 水体-沉积物界面（SWI）的氧通量大小直接影响沉积物中氧的空间分布，继而决定了沉积物中各种物质的形态转化及能量传递过程；SWI中的氧通量大小受到水动力条件、沉积物的微剖面结构特性的影响。选择三峡库区典型次级河流为研究对象，联合声学多普勒流场测试技术与微电极测试技术，构建非侵入式涡度相关原位测试方法；探索氧在SWI中的传质途径及规律，深入挖掘氧通量的大小对沉积物分区的潜在作用机理；剖析水动力条件以及沉积物微剖面特性对SWI氧通量的影响机制，获得其重要的动力学参数，最终形成SWI中氧通量与水动力条件以及沉积物微剖面特性之间的机理模型。研究成果将进一步揭示SWI中物质及能量的传质机理及规律，在沉积物中物质与能量的迁移转化机理方面取得理论突破，为水体沉积物的污染修复提供重要的理论基础和技术支撑，具有重要的学术意义和应用前景。

中文关键词： 水-沉积物界面；氧通量；非侵入式涡度相关技术；机理模型

英文摘要： Oxygen fluxes in water-sediment interface (SWI)directly affects the spatial distribution of oxygen in the sediments, and then determines the transformation and energy transfer of various substances in sediments; Oxygen fluxes in SWI is influenced by hydrodynamic conditions and micro-sectional structural properties of sediments. The typical secondary river of the Three Gorges Reservoir will be selected as the research object, Joint Acoustic Doppler flow field testing technology and microelectrode technology to build a non-invasive eddy-correlation technique; Explore ways and laws of the oxygen transfer in the SWI, research the potential mechanisms of oxygen flux to sediment partition；Analyze the influence mechanism of hydrodynamic conditions and sediment composition on SWI oxygen flux; obtain important kinetic parameters, and form mechanism model of SWI oxygen flux between hydrodynamic conditions and sediment micro-sectional characteristics. Further research will reveal the mechanism of mass and energy transfer on SWI, theoretical breakthrough about migration and transformation mechanism of matter and energy in sediments will be made. Provide important theoretical basis and technical support for the remediation of contaminated sediments in water. It has important academic significance and application prospects.

英文关键词： water-sediment interface;oxygen fluxes;non-invasive eddy-correlation technique;mechanism model