WAMSI 2 - Dredging Node - Project 3.1.3 - Numerical modelling of dredge plumes: a review

In this review, we synthesize the current knowledge on several key processes for sediment transport modelling,
and standard practice of sediment transport modelling around the world with a particular focus on the
applicability to tropical marine waters off north Western Australia, and tropical Australia more broadly. We also
review a number of EIA modelling studies around tropical Australia associated with coastal infrastructure
developments. We assess factors contributing to the accuracy in model predictions and the effectiveness of
monitoring and managing the impacts during dredge operations. The key issues assessed are: (i) contemporary
understanding, algorithms and parameters in sediment transport models; (ii) the process of testing and validating
model predictions; and (iii) the required data for model parameter estimation and model validation. Emphasis is
placed on the choice of parameters for modelling key processes for predicting the fate of dredge plumes,
including flocculation, resuspension and deposition of the sediments generated through dredging.

本综述系统梳理了当前泥沙输运模拟若干核心过程的既有研究认知，以及全球范围内泥沙输运模拟的通用实践规范，重点聚焦于其在澳大利亚西北部近海热带海域以及更广泛的澳大利亚热带区域的适用性。此外，本综述还梳理了澳大利亚热带区域内与沿海基础设施开发相关的多项环境影响评价（Environmental Impact Assessment, EIA）模拟研究。本综述评估了影响模型预测精度的各类因素，以及疏浚作业期间对影响进行监测与管理的有效性。本次评估的核心议题包括：(i) 泥沙输运模型的当前认知、算法与参数设置；(ii) 模型预测结果的测试与验证流程；(iii) 模型参数估算与模型验证所需的数据集。本综述重点关注疏浚羽流归宿预测相关核心过程的参数选取，涵盖疏浚作业产生沉积物的絮凝、再悬浮与沉积过程。