CAJ | 학술논문

根据青岛市大沽河下游咸水分布区水文地质条件,采集该地区代表性中砂进行砂槽模拟试验,分析了抽水量、抽水井的位置以及抽水持续时间对咸水体修复效果的影响.试验结果表明:进行抽水修复时,各观测点盐度依次降低,并且形成突降;抽水量越大,咸水的去除速率越高,修复时间越短,抽水量从80畅2 mL/min 分别增至160畅2 mL/min、240畅2 mL/min 时,修复时间缩短为之前的52畅4%和34畅9%;将抽水井安置在隔水边界附近,能够有效地抽取高浓度咸水,显著提高地下咸水体的整体修复效果;该试验条件下,抽水持续时间为115 min 时,虽然结束抽水时的出水盐度为0畅274%,但是依靠自然修复仍然能够满足饮用水标准,相较于出水盐度为0畅10%的抽水持续时间缩短了30畅3%,大幅降低修复成本,对咸水体的工程研究具有明显的经济意义.
근거청도시대고하하유함수분포구수문지질조건,채집해지구대표성중사진행사조모의시험,분석료추수량、추수정적위치이급추수지속시간대함수체수복효과적영향.시험결과표명:진행추수수복시,각관측점염도의차강저,병차형성돌강;추수량월대,함수적거제속솔월고,수복시간월단,추수량종80창2 mL/min 분별증지160창2 mL/min、240창2 mL/min 시,수복시간축단위지전적52창4%화34창9%;장추수정안치재격수변계부근,능구유효지추취고농도함수,현저제고지하함수체적정체수복효과;해시험조건하,추수지속시간위115 min 시,수연결속추수시적출수염도위0창274%,단시의고자연수복잉연능구만족음용수표준,상교우출수염도위0창10%적추수지속시간축단료30창3%,대폭강저수복성본,대함수체적공정연구구유명현적경제의의.
Based on the hydrogeological conditions of the underground saltwater distribution area in the lower reaches of the Dagu River in Qingdao City, we conducted sand tank experiments using typical medium sand samples in this area to investigate how the flux, location, and duration of pumping influence the remediation of saltwater . The simulation results indicate that salinity of the observation points decreased in sequence and sharply .The larger the pumping flux was, the higher the removal rate of saline water would be, and thus the shorter the needed remediation time would be.When the flux increased from 80.2 mL/min to 160.2 mL/min and 240.2 mL/min, the remediation time decreased to 52.4% and 34.9% of original time, respectively.When the pumping well was located near the impermeable boundary , it could effectively extract high-concentrated saline water and significantly improve the overall remediation effect .When the pumping duration was 115 min under the experimental conditions , though the pumped water salinity was 0.274% at the end of the pumping process, it met the drinking water standards through the natural recovery process , and the pumping duration was shortened by 30.3% compared to that with a pumped water salinity of 0.10%.This reduced the remediation cost to a significant degree and had obvious economic significance to remediation of underground saltwater .