| The overall purpose of this study is to use sediment settling data provided by the U.S. Army Crops of Engineers, to analyze performance of 15 Confined Placement Areas (CPAs) during maintenance of the channel project. This study is a part of a feasibility study of deepening and widening of the Sabine-Neches Waterway, Texas. Two modules of the Automated Dredging and Disposal Alternatives Management System (ADDAMS), DYECON and SETTLE, are used to design CPAs. Design of confined placement areas greatly depends on dike height, weir length, surface area, flow path length of placement area (PA) and effluent total suspended solids (TSS) concentration requirements. Effluent water quality (e.g. TSS) must meet the state water regulations. Dredged sediment can be placed at different locations along waterway of the placement area, therefore one short flow path and one long flow path are determined for each placement area. The SETTLE software runs were performed for all 15 PAs with reduced areas and total areas for both long and short flow paths. (Abstract shortened by UMI.)... |
