Determining the effects of a pipeline spill in Canadian boreal lakes: experimental additions of**diluted bitumen (dilbit) to in-situ enclosures at the IISD-experimental lakes area

我们将评估稀释沥青(DILBIT)泄漏到水中的相关风险，这是管道带来的主要环境风险。这项研究的目的是产生关于DILBIT的命运、运输和毒性的重要信息，以便为未来管道项目的管理实践和监管措施提供信息。本研究的目标是：(1)模拟封闭系统中模拟的加拿大北方天然水柱中稀释物成分的行为、去向和风化；(2)基于“水柱”和“底部基质”暴露设计对稀释物成分进行暴露评估；(3)确定稀释物成分在水柱和底部基质中的生物累积；(4)基于“剂量-反应”设计评估稀释物的毒性；以及(5)提供急需的信息，以帮助制定加拿大稀释沥青运输的管理实践和法规。这项研究将提供有关稀释物泄漏对水环境的长期影响的重要信息，并协助规划未来泄漏的补救战略。这些信息对当地决策者至关重要，包括加拿大环境和气候变化、加拿大渔业和海洋、国家能源局和安大略省环境部，他们负责管理受管道泄漏影响的土地。**

We will assess risks associated with a diluted bitumen (dilbit) spill to water, the major environmental risk from pipelines. The purpose of this research is to generate important information on the fate, transport, and toxicity of dilbit to inform management practices and regulatory measures on future pipeline projects. The objectives of this research are: (1) quantify the behavior, fate, and weathering of dilbit constituents in a natural Canadian Boreal water column as simulated in a contained enclosure system; (2) perform an exposure assessment of dilbit constituents based on a 'water column' and 'bottom substrate' exposure design; (3) determine bioaccumulation of dilbit constituents from a water column', and 'bottom substrate' exposure design; (4) assess dilbit toxicity based on a 'dose-response' design; and (5) provide much-needed information to assist the development of management practices and regulations for the transport of diluted bitumen in Canada. This research will provide important information on the long term impacts of dilbit spills in aquatic environments and assist in planning remediation strategies for future spills. This information is critical for local decision makers, including Environment and Climate Change Canada, Fisheries and Oceans Canada, the National Energy Board, and the Ontario Ministry of the Environment, who are responsible for managing lands affected by pipeline breaches.**