摘要
为了克服松散含水介质非均质性各向异性对介质渗透系数的求取所带来的困难,以水动力条件为线索,利用互相关法寻找同一时代地层及同一时代地表水的主、次流方向。在主流方向上,建立了石家庄-束鹿—衡水段介质颗粒粒径随距离递变的数学模型,并以此为基础推求无钻孔地段的粒径。同时,运用分形理论,计算了中、上更新统地层主流方向平均粒径空间分布的分维值,并将其作为检验粒径估值正确与否的判据。通过不同岩性的渗透系数—深度模型,实现了用平均粒径预测渗透系数的全过程。
It is difficult to predict hydraulic conductivity of the loose porous media for its spatial heterogeneity. The present study found out the layers in the same period according to the positive correlation between grain size and hydrodynamic force, and presumed the main and minor surface water flow directions in different periods using cross-relation method. Power model between grain size and distance in the main direction was then established for Shijiazhuang-Sulu-Hengshui. Based on the model,the grain size in the sites is estimated without observation data. Fractal dimension of grain size on the main flow direction was accounted to test the estimation. According to the estimation results ,hydraulic conductivity of the loose porous media is predicted using K-H model.
出处
《地质科技情报》
CAS
CSCD
北大核心
2007年第1期87-90,共4页
Geological Science and Technology Information
基金
国家计委防灾
减灾项目"河北平原水资源开发利用引起的地质灾害及对策研究"(计国地函[1998]29号)
关键词
主流方向
渗透系数
分维值
松散介质
main flow direction
hydraulic conductivity
fractal dimension
loose porous media
