Award for Creavivity in Engineering

本研究项目属于岩土工程与地下水资源研究领域。该问题涉及近地表含水层（由冰川底泥或冲积泥沙组成的相对不透水层）阻止碳氢化合物进入浅层承压含水层的效率。所提出的工作涉及研究渗透率（水力导电性）中等差异的两层之间界面附近的非混相（非混相）流体流动的模式和参数。导致横向流动的水力梯度被植入较低的、渗透性较强的地层中。相对渗透率和不同的自流压力对地层界面上不溶流体运动的影响以及由此产生的含水层内容器的垂直分布是本研究的中心焦点。地下环境将在一个透明的矩形容器中模拟为承压含水层。为了模拟承压含水层的局部污染，将允许不混溶流体（出于安全原因可能是煤油）渗透到含水层的一小块区域。该研究将流动分析扩展到受波动流体压力和速度影响的分层地下环境，从而更好地接近现场条件。

This research project resides in the field of geotechnical engineering and groundwater resources. The problem addresses the efficiency of near surface aquitards (a relatively impermeable layer comprised of glacial sill or alluvial silt) to retard the entry of hydrocarbons into shallow confined aquifers. The proposed effort involves the study of the pattern and parameters of immiscible (non-mixable) fluid flow near the interface between two strata with moderately dissimilar permeabilities (hydraulic conductivity). A hydraulic gradient causing lateral flow is implanted in the lower, more permeable stratum. The effects of relative permeability and varying artesian pressure on the movement of immisable fluids at strata interfaces and the resulting vertical distribution of the containment within the aquifer are the central focus of this investigation. The subsurface environment will be modelled in a clear rectangular container as a confined aquifer. To simulate localized contamination of the confined aquifer, the penetration of an immisicible fluid (probably kerosene for safety reasons) will be permitted to penetrate a small area of the aquitard. This study will extend flow analysis to stratified subsurface environment subject to flucuating flow pressures and velocities which better approximates in-situ conditions.