Advancement in Slug Tests
The multilevel slug test is useful to provide information for determining the vertical distribution of local hydraulic conductivity, K(z). General consensus have been reached: (1) aquifer storativity can be neglected for the groundwater flow induced by a slug test, and thus the quasi-steady state approach is valid for modeling slug test response, hw(t), (2) aquifer anisotropy is not determinable by slug tests; (3) the initial pressure head difference hi the tested well, ho, should be kept small to avoid nonlinear dependence of hw(t) on ho, (4) the pressure transducer for the measurement of hw(t) should be positioned close to the static water level to avoid the dynamic, depth-dependent effects on hw(t), and (4) hw(t) is monotonic in low permeable aquifers while oscillatory with respect to the static water level in highly permeable aquifers. The on-going study shows, however, the frequently used slug test models may yield estimates of K changing with the tested screen length, ls. This gives rise to the highly unde sired issue of non-uniqueness. A new three-dimensional slug test model is developed, showing that the estimate of K reaches a stable value for small ls. This stable value can be considered as the representative hydraulic conductivity.
slug test quasi-steady state tested screen length representative hydraulic conductivity.
Chia-Shyun Chen
Graduate Institute of Applied Geology, National Central University, Taiwan, ROC
国际会议
The IPACES 6th Annual Meeting(“现代地球科学，交流与合作国际学术研讨会暨第六届IPACES学术年会)
武汉
英文
30-31
2007-04-25（万方平台首次上网日期，不代表论文的发表时间）