tailieunhanh - BARRIER SYSTEMS for ENVIRONMENTAL CONTAMINANT CONTAINMENT and TREATMENT - PART 2

Theo sự hiểu biết của các cơ chế vận chuyển chất gây ô nhiễm thông qua hệ thống rào cản cải thiện, thiết kế của các hệ thống ngăn chặn di chuyển từ một cách tiếp cận quy tới một cách tiếp cận thiết kế thực hiện. Dự kiến rằng sự phụ thuộc vào mô hình cho thiết kế dựa trên dự báo sẽ tăng trong tương lai, như sự cần thiết để dự đoán tăng rào cản hiệu năng hệ thống dài hạn. Chương này trình bày chi tiết các cơ chế và mô hình để dự đoán hiệu. | 2 Modeling of Fluid Transport through Barriers Prepared by Brent E. Sleep University of Toronto Toronto Canada Charles D. Shackelford Colorado State University Fort Collins Colorado Jack C. Parker Oak Ridge National Laboratory Oak Ridge Tennessee OVERVIEW As understanding of the mechanisms of contaminant transport through barrier systems improves the design of containment systems is moving from a prescriptive approach to a performance design approach. It is expected that reliance on models for predictive-based design will increase in the future as the need for predicting long-term barrier system performance increases. This chapter details the mechanisms and models for predicting the performance of components of passive barriers such as caps permeable reactive barriers PRBs and walls and floors. The relevant regulatory drivers and current state of practice are summarized and research needs are identified. Chapter 1 dealt with system performance modeling while this chapter focuses on the performance of components that constitute containment systems. With contributions by Calvin C. Chien DuPont Wilmington Delaware Thomas O. Early Oak Ridge National Laboratory Oak Ridge Tennessee Clifford K. Ho Sandia National Laboratories Albuquerque New Mexico Richard C. Landis DuPont Wilmington Delaware Alyssa Lanier University of Wisconsin Madison Wisconsin Michael A. Malusis GeoTrans Inc. Westminster Colorado Mario Manassero Politecnico I Torino Italy Greg P. Newman Geo-Slope International Ltd. Calgary Canada Robert W. Puls . Environmental Protection Agency Ada Oklahoma Terrence M. Sullivan Brookhaven National Laboratory Upton New York 71 2006 by Taylor Francis Group LLC 72 Barrier Systems for Environmental Contaminant Containment Treatment CAPS Features Events and Processes Affecting Performance of Caps Covers and caps are engineered structures that must perform within a larger dynamic natural system and as such must be designed with consideration of natural .