Department of Geography and Environmental Science Program, University of North Texas, 1155 Union Circle #305279, Denton, TX 76203-5017, USA.
Bull Environ Contam Toxicol. 2011 Jul;87(1):96-100. doi: 10.1007/s00128-011-0295-y. Epub 2011 May 7.
Funnel-and-gate structures with three gates, two funnels (collinear with gates), and two perpendicular flow-directing vanes (baffles) were assessed for capturing contaminated groundwater in a hypothetical unconfined aquifer. Simulated structures, anchored into an underlying aquiclude, were 35 m wide. One 5-m wide gate occupied the center, and two 3-m wide gates occupied the ends, of each structure. Both homogeneous and heterogeneous (with respect to hydraulic conductivity) aquifers were modeled, with baffles at various positions along funnels in alternative configurations. A contaminant transport model, accounting for advection and hydrodynamic dispersion, tested the capability of various structures for capturing contaminant plumes. Based upon modeling results: (1) structures with baffles performed up to 17% better (homogeneous case), but also up to 48% worse (heterogeneous case), than structures without them; (2) the most effective baffles generally occupied interior portions of funnels; and (3) small (1-m) shifts in the locations of baffles resulted in up to a 33% increase (homogeneous case) in remediation timeframe.
带有三个闸门、两个漏斗（与闸门共线）和两个垂直的流向导流叶片（挡板）的漏斗门结构被评估用于捕获假想无限制含水层中的受污染地下水。模拟结构锚固在下面的隔水层中，宽 35 米。每个结构的中心占据一个 5 米宽的闸门，两端各占据一个 3 米宽的闸门。对均质和非均质（水力传导率方面）含水层进行建模，在不同位置的挡板沿漏斗以不同的配置交替布置。一个考虑了对流和水动力弥散的污染物输运模型，测试了各种结构捕获污染物羽流的能力。基于建模结果：(1) 带有挡板的结构的性能比没有挡板的结构好 17%（在均质情况下），但也差 48%（在非均质情况下）；(2) 最有效的挡板通常占据漏斗的内部部分；(3) 挡板位置的微小（1 米）偏移会导致修复时间框架增加高达 33%（在均质情况下）。
