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首页> 外文会议>Western Dredging Association Twenty-Second Technical Conference, Thirty-Fourth Texas Aamp;M Dredging Seminar, and Special Permanent International Association of Navigational Congresses Session, Jun 12-15, 2002, Denver, Colorado >SITE CHARACTERIZATION: A KEY FOR ENVIRONMENTAL DREDGING
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SITE CHARACTERIZATION: A KEY FOR ENVIRONMENTAL DREDGING

机译：场地特征：环境疏的关键

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摘要

This paper examines the importance of properly characterizing the dredging target areas as a prerequisite for design and implementation of environmental dredging projects. Target areas at projects completed to-date have frequently been inadequately characterized, leading to the selection of improper dredging equipment and procedures and contributing to project delays, cost overruns, and unsatisfactory outcomes. Key elements for characterizing in-water target areas prior to environmental dredging include determining (a) chemical contaminants and their concentrations at the sediment surface and at depth; (b) presence of protected areas and species, and sensitive habitats; (c) water body conditions; (d) sediment physical properties; (e) location of rocks, obstructions, and debris; and (f) dredge slurry characteristics. These data are needed to feed into and influence key project design elements such as identifying target areas, type of dredge, type of resuspension barriers, appropriate dredging sequence and procedures, and methods for managing dredge slurry. As environmental dredging projects increase in size, the importance of pre -design characterization to the project schedule, cost, and outcome becomes more apparent. The key characterization elements and their relation to key project design elements are discussed in some detail. Example projects are cited. A Case Study, the Hudson River PCBs Superfund Site, is examined.
机译：本文探讨了正确描述疏target目标区域的重要性，这是设计和实施环境疏projects项目的前提。迄今为止，已完成项目的目标领域常常没有足够的特征，导致选择了不适当的疏equipment设备和程序，并导致项目延误，成本超支和不满意的结果。在环境疏ed之前表征水下目标区域的关键要素包括：（a）确定化学污染物及其在沉积物表面和深度的浓度； （b）存在保护区和物种以及敏感的栖息地； （c）水体状况； （d）沉积物的物理性质； （e）岩石，障碍物和碎片的位置； （f）疏slurry泥浆特性。需要这些数据来输入和影响关键项目设计元素，例如确定目标区域，挖泥机的类型，重悬屏障的类型，适当的挖泥顺序和程序以及用于管理挖泥机泥浆的方法。随着环境疏projects项目规模的扩大，预先设计特性对项目进度，成本和成果的重要性变得越来越明显。详细讨论了关键特征元素及其与关键项目设计元素的关系。引用了示例项目。研究了一个案例研究，即哈德逊河多氯联苯超级基金站点。

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