Modelling the reponse of the St. Lawrence tributaries to environmental changes: integrated study and development tools

圣劳伦斯支流对环境变化的响应建模：综合研究和开发工具

• 批准号: 360657-2007
• 负责人: Roy, André
• 金额: $ 3.61万
• 依托单位: Université de Montréal
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2007
• 资助国家: 加拿大
• 起止时间: 2007-01-01 至 2008-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=362721
• 关键词: Modelling; reponse; St.; Lawrence; tributaries

It has been shown in an initial study that hydrological changes and base level drop anticipated for St-Lawrence tributaries in the climate change context will have important impact on their longitudinal profile and on sediment supply to the St-Lawrence. The specific goal of the present study is to extend the 1D modelling approach used in the initial study to include a wider view of the potential effects of environmental changes on the tributaries dynamics. The project will focus on 1) the simulations of the spatial and temporal patterns of river adjustment and the forecasting of sediment transport volume that will be supplied to the St-Lawrence, 2) a better understanding of the winter/spring period, which is most likely be affected by the global climate changes, in particular of the ice cover formation and breakup processes and of their effects on sediment transport anddelivery 3) an assessment of the impacts of hydrological, morphological and sedimentological changes on riparian habitats, mainly at the river mouth. This research will combine a modeling approach and field surveys on two St-Lawrence tributaries. The project will provide new data and will require the development and improvement of modelling tools that will be compatible with the existing 2 D hydrodynamic models used for the St-Lawrence River.The project is closely connected with the partner's interests and needs in term of comprehension of sediment transport and bank erosion processes, ice cover formation and response of riparian vegetation to environmental changes.

初步研究表明，在气候变化背景下，圣劳伦斯河支流的水文变化和基准面下降将对其纵向剖面和圣劳伦斯河的沉积物供应产生重要影响。本研究的具体目标是扩展最初研究中使用的一维建模方法，以更广泛地了解环境变化对支流动态的潜在影响。该项目将侧重于1）河流调整的时空模式的模拟和对圣劳伦斯河输沙量的预测，2）更好地了解冬季/春季，这是最有可能受到全球气候变化的影响，特别是冰盖的形成和破裂过程及其对沉积物输移和输送的影响; 3）评估水文、河岸生境的形态学和沉积学变化，主要是在河口。这项研究将结合联合收割机的建模方法和实地调查的两个圣劳伦斯支流。该项目将提供新的数据，并将需要开发和改进的建模工具，将与现有的二维水动力学模型用于圣劳伦斯河。该项目是密切相关的合作伙伴的利益和需求，在理解泥沙输运和银行侵蚀过程，冰盖的形成和河岸植被对环境变化的反应。