The fate of water from melting ground ice in degrading permafrost environment

在退化的永久冻土环境中融化的地面冰所产生的水的命运

• 批准号: RGPIN-2017-06544
• 负责人: Fortier, Richard
• 金额: $ 1.75万
• 依托单位: Université Laval
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=636217
• 关键词: fate; water; melting; ground; ice

Among the geohazards associated with permafrost degradation which impact the sustainable development of Northern Canada, the vulnerability to thaw subsidence is widespread. The thaw consolidation of permafrost is closely related to water content, cryostructure, soil texture, rates of thawing and dissipation of pore water pressure. However, little is known on the fate of water from melting ground ice in degrading permafrost. How does the pore water dissipation control the thaw consolidation? Where the meltwater is flowing into the ground? Is the meltwater recharging the aquifers at depths or is it migrating at the ground surface and ultimately finding its way in lakes, rivers, and oceans?

在影响加拿大北部可持续发展的多年冻土降解相关的地质灾害中，融化沉降的脆弱性很普遍。多年冻土的融化巩固与水含量，冷冻结构，土壤质地，解冻速率和孔隙水压耗散密切相关。然而，在融化地面冰层中熔融冰冻冰冻的命运中，知之甚少。孔隙水耗散如何控制融化巩固？融化流入地面的何处？融水是在深处充电含水层还是在地面迁移并最终在湖泊，河流和海洋中找到道路？