粉细砂含水层在人工回灌时渗透系数的变化规律  

Variation pattern of permeability coefficient of silty and fine sand aquifer during artificial recharge

作　　者：黄倩 万彬 HUANG Qian;WAN Bin(Geological Survey of Jiangsu Province,Nanjing,Jiangsu 210018,China;Bureau of Water Supplies of Wujiang District of Suzhou City,Suzhou,Jiangsu 215200,China;Geological Society of Jiangsu Province,Nanjing,Jiangsu 210018,China)

机构地区：[1]江苏省地质调查研究院,江苏南京210018 [2]苏州市吴江区水务局,江苏苏州215200 [3]江苏省地质学会,江苏南京210018

出　　处：《安徽地质》2023年第2期139-143,共5页Geology of Anhui

基　　金：江苏省地质勘查基金项目“苏南现代化建设示范区综合地质调查”(编号:12120115043201)资助。

摘　　要：渗透系数是设计地下水人工回灌方案的重要参数。苏州吴江盛泽镇新安水利站地下水人工回灌试验层为典型的河漫滩相粉细砂含水层,埋深98.1~105.8 m,厚度7.7 m。回灌试验系统可实施持续与间断、常压与加压、定流量与定压力等多种模式回灌。利用2020年的试验资料,建立模型,通过直线图解法求得12个试验周期内所对应的渗透系数K值。采用MATLAB进行数据处理与模拟计算,得出渗透系数在回灌持续过程中衰减规律符合指数方程:K(t)=0.58+0.48e-0.21t。Permeability coefficient is an important parameter in the design of groundwater artificial recharge.Such a recharge test at the Xin’an Water Conservancy Station in Shengze Town,Wujiang,Suzhou is performed on a typical alluvial flat-facies silty and fine sand aquifer of 7.7 m in thickness buried at a depth of 98.1~105.8 m.The recharge test system has a number of working modes,such as continuous or intermittent recharge,at normal or elevated pressure,at fixed flow or pressure.A model was developed using the test data of 2020,and the corresponding values of permeability coefficient K in 12 test periods were obtained using linear graphic method.By MATLAB-based data processing and simulation calculation,it is concluded that the attenuation law of permeability coefficient in the continuous recharge process conforms to the exponential equation:K(t)=0.58+0.48e-0.21t.

关 键 词：粉细砂层 人工回灌 渗透系数 

分 类 号：P641[天文地球—地质矿产勘探]