沿海滩涂区底泥-水体可溶性盐分迁移规律研究  

Study on Soluble Salt Migration Pattern in Coastal Mudflat Sediment-Water System

作　　者：袁靖宇 王锦国[1] 陈舟[1] 李伟健 Yuan Jingyu;Wang Jinguo;Chen Zhou;Li Weijian(School of Earth Science and Engineering,Hohai University,Nanjing,Jiangsu 211100)

机构地区：[1]河海大学地球科学与工程学院,南京211100

出　　处：《中国煤炭地质》2020年第4期57-61,共5页Coal Geology of China

基　　金：国家自然科学基金资助项目:不可或缺和恢复的地下水资源及其计算评价(41572209)。

摘　　要：底泥盐分的释放是滨海区水体咸化的重要因素之一。从研究底泥-水体系统盐分迁移规律入手,通过室内实验主要探索了静置状态下底泥厚度对该系统中盐分迁移的影响,并初步阐明了系统中的溶质运移机理。实验结果表明:底泥厚度的大小与其单位质量盐分释放强度以及盐分迁移率均成反比;仅在分子扩散作用下发生的垂向溶质运移影响深度是有限的;底泥盐分向水中释放的过程是不连续的,将这种导致土体盐分释出忽快忽慢的现象称之为盐分分层释出。The release of salt from sediment is one of major factors caused beach area water mass salinization.Start from sediment-water system salt migration pattern study,through laboratory experiment has mainly explored impact from sediment thickness on system salt migration under static status,and initially expounded solute migration mechanism in the system.The experiment result has shown that the sediment thickness size along with its unit mass salt release intensity and salt migration ratio are all inversely proportional.The vertical solute migration impact depth is limited under only molecular diffusion.The process of salt release from sediment is discontinuous;the phenomenon of sediment salt release fast or slow called the salt stratified release.

关 键 词：滨海地区 水体咸化 底泥释放 溶质运移 

分 类 号：P641[天文地球—地质矿产勘探]