对水敏感性的机理与影响因素的研究

通过对咸淡水界面水敏感性机理与影响因素的研究，表明在非反应性微粒的释放迁移、反应性微粒的膨胀和絮凝作用与胶体吸附架桥作用下多孔介质中微粒物质的释放、膨胀、迁移、重沉积等引起的孔喉阻塞是导致水敏感性的机理所在；临界盐浓度、临界盐浓度变化率、临界离子强度、一临界流速和pH值是水敏感性的主要影响因素；指出水敏感性的研究对防止海水入侵具有重要的理论意义和实用价值。

Mechanism of the Water Sensitivity and Affecting Factors

The research of the mechanism of water sensitivity at the seawater-freshwater interface and its affecting factors shows that the pore throat blocking resulting from release, expansion, migration and heavy sediment of particles in porous media by the action of release-migration of non-reactive particles and expansion-flocculation of reactive particles as well as the crosslinkage of colloid absorption is the mechanism of water sensitivity. The factors such as critical salt concentration, its change rate, critical ionic strength, critical flow velocity and pH value of water affect the sensitivity of the water. It points out that the research of water sensitivity possesses important theoretical meaning and practical value for prevention of sea water intrusion.