Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020WR027672 |
Modeling Diffusivity Tests in Heterogeneous Aquifers: a Stochastic First‐Order Approach | |
Kan Bun Cheng; Gedeon Dagan; Avinoam Rabinovich | |
2020-08-20 | |
发表期刊 | Water Resources Research |
出版年 | 2020 |
英文摘要 | The diffusivity test considered here consists of injecting (or pumping) a volume of water through short segments of a well for a short time and measuring the travel time of the peak of the head signal at different points in the surrounding aquifer volume. The specific storage is assumed to be constant while the hydraulic conductivity of the heterogeneous aquifer is modeled as a random lognormal field. The axi‐symmetric anisotropic structure is characterized by a few parameters (logconductivity mean and variance, horizontal and vertical integral scales). The paper determines the mean and variance of the peak travel time as function of distance from an instantaneous source by solving the flow equation using a first order approximation in the logconductivity variance. The mean travel time is recast in terms of the equivalent conductivity which decreases from the harmonic mean near the source to the effective conductivity in uniform flow for a sufficiently large distance. Similarly, the variance drops from its maximum near the source to a small value. Application to field test is discussed and topics of future investigations are suggested. |
领域 | 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/291094 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Kan Bun Cheng,Gedeon Dagan,Avinoam Rabinovich. Modeling Diffusivity Tests in Heterogeneous Aquifers: a Stochastic First‐Order Approach[J]. Water Resources Research,2020. |
APA | Kan Bun Cheng,Gedeon Dagan,&Avinoam Rabinovich.(2020).Modeling Diffusivity Tests in Heterogeneous Aquifers: a Stochastic First‐Order Approach.Water Resources Research. |
MLA | Kan Bun Cheng,et al."Modeling Diffusivity Tests in Heterogeneous Aquifers: a Stochastic First‐Order Approach".Water Resources Research (2020). |
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