抽取地下咸水防治海水入侵的物理模拟试验

发布时间：2018-06-24 21:11

本文选题：抽取地下咸水 + 海水入侵界面　；参考：《人民黄河》2017年06期

【摘要】：抽取地下咸水是河口海岸带地区防治海水入侵的可行性措施之一。通过构建室内砂箱物理模型并结合着色技术,分析不同抽咸强度和布井方式下海水入侵咸淡水界面运移规律以及地下水流场演变机制,研究不同情境下抽取咸水对海水入侵的防治效果。结果表明:地下水流场受抽取咸水的强度和布井方式影响,可通过加大咸水抽取强度、优化布井方式,实现抽咸牵引防治海水入侵的最佳效果。固定咸水抽取强度时,远离咸淡水界面进行的叠加井抽水与单井抽水效果相比,并不具备优越性;在海水入侵界面以下咸水体上部抽取咸水,可防止抽咸过程中海水入侵界面向内陆移动,在海水入侵界面近趾端处抽取咸水可以使海水楔趾端更快向海水区回退;保持一定的咸水抽取强度时,在海水入侵界面以下咸水体上部与趾端位置处进行分散式布井,可以达到整体修复滨海含水层的效果。
[Abstract]:Extracting underground salt water is one of the feasible measures to prevent seawater intrusion in estuarine and coastal zone. By building indoor sand tank physical model and combining coloring technology, this paper analyzes the migration law of salt-fresh water interface and the evolution mechanism of groundwater flow field under different salinity intensity and well layout mode. To study the prevention and cure effect of salt water extraction on seawater invasion in different situations. The results show that the groundwater flow field is affected by the strength of the extracted salt water and the pattern of well layout. The best effect of brackish traction can be achieved by increasing the extraction intensity of salt water and optimizing the well layout method. When the extraction strength of fixed salt water is fixed, the superimposed well pumping away from the interface of salt and fresh water is not superior to that of single well pumping, and the salt water is extracted from the upper part of the salt water body below the salt water invasion interface. It can prevent the seawater intrusion interface from moving inland during the process of brackish drainage. The extraction of salt water near the toe end of the seawater intrusion interface can make the wedge end of the seawater recede back to the sea water area more quickly, and when the salt water extraction intensity is maintained, a certain amount of salt water extraction intensity can be maintained. The effect of restoring littoral aquifer can be achieved by distributed well arrangement at the upper part and toe end of salt water body below the interface of seawater intrusion.
【作者单位】：烟台大学环境与材料工程学院;山东省水利科学研究院;山东省水资源与水环境重点实验室;
【基金】：国家重点研发计划项目(2016YFC0402800,2016YFC0402809) 国家国际科技合作专项(2012DFG22140) 国家自然科学基金面上项目(40776050)
【分类号】：P731.2

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