文章摘要
戴云峰,林锦,郭巧娜,孙晓敏,陈永强,刘九夫.快速评价海水入侵区地层渗透性实验研究[J].水利学报,2020,51(10):1234-1247
快速评价海水入侵区地层渗透性实验研究
Experimental study on rapid evaluation of formation permeability in seawater intrusion area
投稿时间:2020-02-25  
DOI:10.13243/j.cnki.slxb.20200108
中文关键词: 振荡试验  海水入侵区  室内实验  现场实验  渗透系数
英文关键词: slug tests  seawater intrusion area  laboratory experiments  field experiments  hydraulic conductivity
基金项目:国家重点研发计划项目(2016YFC0402800);国家自然科学基金项目(51709186);江苏省自然科学基金项目(BK20170154)
作者单位E-mail
戴云峰 南京水利科学研究院 水文水资源与水利工程科学国家重点实验室, 江苏 南京 210029
南京水利科学研究院 地下水研究中心, 江苏 南京 210029 
 
林锦 南京水利科学研究院 水文水资源与水利工程科学国家重点实验室, 江苏 南京 210029
南京水利科学研究院 地下水研究中心, 江苏 南京 210029 
jlin@nhri.cn 
郭巧娜 河海大学 地球科学与工程学院, 江苏 南京 211100  
孙晓敏 南京水利科学研究院 水文水资源与水利工程科学国家重点实验室, 江苏 南京 210029
南京水利科学研究院 地下水研究中心, 江苏 南京 210029 
 
陈永强 河海大学 地球科学与工程学院, 江苏 南京 211100  
刘九夫 南京水利科学研究院 水文水资源与水利工程科学国家重点实验室, 江苏 南京 210029
南京水利科学研究院 地下水研究中心, 江苏 南京 210029 
 
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中文摘要:
      为快速评价海水入侵区不同埋深地层渗透性,减少实施常规水文地质试验对存在污染含水层的扰动,提出利用振荡试验技术确定滨海地层渗透系数。室内海水入侵砂槽物理模型中实施了注水式振荡试验,在人工潜水含水层和承压含水层中同步监测了试验主井和相邻观测井中水位响应;龙口海水入侵区地下水分层监测井中实施了提水式和注水式振荡试验;利用配线法计算了室内实验和现场实验中目标地层渗透系数。结果表明:海水入侵砂槽物理模型中实施振荡试验为滨海含水层现场利用振荡试验确定不同埋深含水层渗透系数提供了重要经验;相比于提水式振荡试验,注水式振荡试验更易于实施,激发方式(提水和注水)的不同并没有对试验结果造成明显的影响;利用振荡试验在非常短时间内(单井水位恢复时长大部分少于5 min)确定了龙口海水入侵区重要监测断面上不同埋深含水层渗透系数,实验结果准确可靠。
英文摘要:
      In order to quickly evaluate the permeability of different depth aquifers in the seawater intrusion area and reduce the disturbance of hydrogeological tests to the polluted aquifer in the coastal area, the slug test technology was proposed to utilize in determining the hydraulic conductivity coefficient of the coastal aquifer. The injection-water type slug tests were conducted in the sand tank for modeling seawater intrusion, and the water-level response in the main test well and the adjacent observation well were monitored simultaneously in the artificial unconfined aquifer and confined aquifer. The releasing-water and injection-water type slug tests were conducted in the layered groundwater monitoring wells in Longkou seawater intrusion area. The hydraulic conductivity coefficients of the target formation in the laboratory and field experiments were calculated by using the matching type curves method. The results show that the laboratory experiments of slug test in the sand tank for modeling seawater intrusion provide important experience for determining the hydraulic conductivity coefficient of aquifers with different depths by using the slug tests in the field coastal area. The injection-water type slug test is easier to be conducted than the releasing-water type slug test, and the difference between the releasing-water type slug test and the injection-water type slug test has no obvious influence on the test results of the hydraulic conductivity coefficient of the aquifer in the seawater intrusion area. The hydraulic conductivity coefficient of the confined aquifers with different depths were determined by using the slug test in very short time (within about 5 minutes when the water-levels recovered in single test well) at the important monitoring section of Longkou seawater intrusion area,and the experimental results were accurate and reliable.
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