利用CFCs定年数据计算静升盆地含水层渗透系数  

Calculation of aquifer hydraulic conductivity using CFCs age-dating data in the Jingsheng Basin

作　　者：乔小娟[1] 李国敏[1] 王宏义 黎明[1] 樊荣 肖永吉 赵春虎 徐海珍[1] 

机构地区：[1]中国科学院地质与地球物理研究所,北京100029 [2]山西省水资源研究所,太原030001 [3]山西省晋中市灵石县水务局,晋中031300 [4]煤炭科学研究院西安分院水文所,西安710054

出　　处：《水文地质工程地质》2009年第3期21-24,共4页Hydrogeology & Engineering Geology

基　　金：国家自然科学基金资助项目(40672170)

摘　　要：文章利用CFCs(氟氯碳化合物)定年数据,计算山西静升盆地含水层渗透系数。结果表明:补给条件较好的区域与补给条件差的深层承压区相比,地下水年龄偏年轻;从冲洪积扇顶部到扇缘,地下水径流逐渐变缓,含水层渗透系数变小;盆地南部较北部,地下水流动缓慢,渗透系数整体偏小。该方法获得的渗透系数符合实际地质条件。Hydraulic conductivity is an important coefficient in groundwater resources research. In general, this parametert is gained through pumping tests. But this kind of methods has restriction because hydraulic conductivity is of spatial variability. CFCs method is a new way of dating the groundwater age through measuring the CFCs concentration in groundwater. It can be used to date the age of young groundwater recharged by modem water since the 1950s. Using the CFCs age-dating data of groundwater in the Jingsheng Basin in Shanxi Province, the flow rate is estimated in the paper. On the basis of the estimation, the hydraulic conductivity is calculated, which is used in the numerical model. The results show that the groundwater age is small, about 20 years in the recharge area. The groundwater in the deep confined aquifers has poor recharge resources and is almost ＂old water＂ of about 43 years. From the top to the bottom of the flood fan, the rate of groundwater movement becomes small, and the hydraulic conductivity becomes small as well. From north to south of the basin, the flow rate and the hydraulic conductivity have a tendencey to decrease. The hydraulic conductivity calculated with this method matchs the actual aquifer configuration of the Jingsheng Basin.

关 键 词：渗透系数 水流速率 CFCS 地下水定年 静升盆地 

分 类 号：P641.2[天文地球—地质矿产勘探] P641.3[天文地球—地质学]