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?

在影响加拿大北方可持续发展的冻土退化地质灾害中，融沉的脆弱性是普遍存在的。多年冻土的融固结与含水量、冻土结构、土质、融化速率和孔隙水压力消散密切相关。然而，人们对融化的地面冰在退化的永久冻土中的水的命运知之甚少。孔隙水消散如何控制融积？在融水流入地下的地方？融化的水是在深层补充含水层，还是在地表迁移，最终进入湖泊、河流和海洋？