WAMSI 2 - Dredging Node - Project 2.1 - Generation and release of sediments by hydraulic dredging: a review

This project undertook a literature review on particle generation when soil or rock material is subjected to dredging processes, the introduction of the particles into the water column (dredge-induced resuspension) and the early stages of dredge plume development. Knowledge in these areas is required to specify suspended sediment source terms for input to dredge plume prediction models that are used in environmental impact assessment of dredging proposals. The report focuses on the two types of hydraulic dredgers that are most commonly employed in major dredging projects in Australia, namely the trailing suction hopper dredger (TSHD) and the cutter suction dredger (CSD). The report responds to Task 2.1 of the WAMSI Dredging Science Node Science Plan (Masini et al. 2011).This report presents a review of available knowledge on the generation/development of sediment particle size characteristics by dredging processes, and the mass release rates (resuspension rates) from dredging activities. This report responds to Task 2.1 of the WAMSI Dredging Science Node Science Plan (Masini et al. 2011).

本项目针对土体或岩体在疏浚作业过程中产生颗粒、颗粒进入水体（疏浚诱导悬浮）以及疏浚羽流发育早期阶段开展了系统性文献综述。当前上述领域的研究认知，是为疏浚羽流预测模型确定悬浮沉积物源项的必要依据，而此类模型被广泛应用于疏浚项目的环境影响评价工作。本报告聚焦澳大利亚大型疏浚工程中最常用的两类水力疏浚船，即耙吸式挖泥船（trailing suction hopper dredger, TSHD）与绞吸式挖泥船（cutter suction dredger, CSD）。本报告响应了西澳海洋科学研究所（Western Australian Marine Science Institution, WAMSI）疏浚科学节点科学计划中的任务2.1（Masini等，2011）。
本报告综述了现有关于疏浚作业产生与发育沉积物粒径特征，以及疏浚活动质量释放速率（悬浮速率）的相关研究认知。本报告响应了WAMSI疏浚科学节点科学计划中的任务2.1（Masini等，2011）。