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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 >EVALUATION OF SEDIMENT REMOVAL OPTIONS AND BENEFICIAL USE OF DREDGED MATERIAL FOR ILLINOIS RIVER RESTORATION: PRELIMINARY REPORT
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EVALUATION OF SEDIMENT REMOVAL OPTIONS AND BENEFICIAL USE OF DREDGED MATERIAL FOR ILLINOIS RIVER RESTORATION: PRELIMINARY REPORT

机译：伊利诺伊州河流修复的沉积物去除方案评估和受益材料的有益使用：初步报告

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The overall habitat quality of the Illinois River is significantly degraded by over 100 years of sediment accumulation. Once-deep backwaters and side channels have lost well over 70 percent of their water storage capacity and in many areas average about a foot deep. A twenty-year restoration project by the State of Illinois and Army Corps of Engineers is being planned to address this problem. The Illinois Department of Natural Resources is evaluating methods of restoring habitat diversity by removing sediment to create a variety of water depths and elevations on the floodplain and islands. Numerous agencies and private companies have cooperated in this effort. This paper provides an overview of the work in progress and preliminary results. Potential large scale beneficial uses of the sediment include landscaping soil and island formation. For these purposes it is best to add as little water as possible during dredging. The Dry Dredge ~(TM) completed a small pilot island in two feet of water by filling a ring of geotextile tubes and then pumping sediment at in situ moisture content into the ring. The Dry Dredge ~(TM) and a conventional clamshell also piled sediment at various elevations on an existing island where consolidation and erosion were observed. The transport of freshly excavated sediment on conventional conveyor belts was demonstrated. Sediment cores six feet in length were taken with a vibracore and analyzed for a variety of chemical and physical parameters. Plant growth in sediment was compared to that of native topsoil in greenhouse tests, and field tests with corn and soybeans are underway. Prior dredged material placement sites were investigated to determine the agronomic properties of the sediment after years of weathering. Additionally, clamshelled sediment at in situ moisture content was trucked to a former industrial site where the progress of soil formation is being monitored along with the appearance of plants. The potential exists for unloading sediment from barges directly onto brownfields and farmland with slurry pumps.
机译：伊利诺伊河的总体生境质量由于沉积物累积超过100年而大大降低。曾经很深的死水和侧渠损失了超过70％的蓄水能力，在许多地区平均约一英尺深。伊利诺伊州和陆军工程兵团计划进行为期20年的修复项目，以解决这一问题。伊利诺伊州自然资源部正在评估通过清除沉积物在洪泛区和岛屿上形成各种深度和高度的水来恢复生境多样性的方法。许多机构和私人公司在这项工作中进行了合作。本文概述了正在进行的工作和初步结果。沉积物潜在的大规模有益用途包括美化土壤和形成岛屿。为了这些目的，最好在挖泥过程中加入尽可能少的水。 Dry DredgeTM通过在一个两英尺深的水中完成一个小试点岛，方法是填充一圈土工布管，然后将原位含水量的沉积物泵入该环中。 Dry Dredge TM和传统的翻盖式结构还在现有岛上观察到固结和侵蚀的不同高度上堆积了沉积物。演示了新挖出的沉积物在传统传送带上的运输。用振动纤芯取六英尺长的沉积芯，并分析各种化学和物理参数。在温室试验中，将沉积物中植物的生长与天然表土的生长进行了比较，并且正在进行玉米和大豆的田间试验。调查了先前挖泥的物料放置位置，以确定经过多年风化后的沉积物的农艺特性。此外，将原位含水量翻盖的沉淀物运到原工业现场，在那里监测土壤形成过程以及植物的外观。存在使用泥浆泵将沉淀物从驳船直接卸载到棕地和农田的潜力。

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