Hydrological and geomorphic controls over permafrost landscape degradation

水文和地貌对多年冻土景观退化的控制

• 批准号: RGPIN-2015-05276
• 负责人: Lamoureux, Scott
• 金额: $ 4.59万
• 依托单位: Queen's University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2016
• 资助国家: 加拿大
• 起止时间: 2016-01-01 至 2017-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=613450
• 关键词: Hydrological; geomorphic; controls; over; permafrost

My research group works to determine the processes and impacts associated with climate and permafrost change in polar regions. We combine hydrological, geomorphological, remote sensing and modelling approaches to determine how different hydrological conditions lead to high soil pore water pressure and predict where these conditions will cause land instability and disturbance. Permafrost disturbance is a major hazard in northern Canada, and affects community and industry infrastructure. The research carried out my group is necessary to support planning and design that will to reduce the impact of permafrost disturbance on the land and water. The objective of this research program is to significantly advance our fundamental knowledge of how climate, water and soil properties interact to cause permafrost landscape instability, and to improve our understanding of the spatial distribution of land susceptible to disturbance. This research requires an integrated approach that uses focused field studies with instruments and sampling to track the movement of water in the soil and measure the seasonal accumulation and thaw of soil ice. This data is used to determine the weather, soil and terrain factors that lead to high soil pore water pressure that can result in disturbance. My research program will also use advanced satellite and aircraft remote sensing techniques to efficiently estimate thaw and infer soil ice content across vast areas. These data sets are combined to model the spatial pattern of soil disturbance susceptibility and verified with field mapping of past disturbances. This program represents an innovative integrated research approach to improve our understanding of the processes and conditions that result in permafrost disturbance and land instability, and will also generate new mapping strategies that can be utilized by land managers to minimize risk to infrastructure and avoid environmental impacts. The proposed program will train 13 HQP and provide them with invaluable technical expertise with environmental instrumentation, sampling, mapping and statistical modelling techniques. Additionally, they will obtain training in a wide range of field planning, permitting and management skills and gain extensive experience working in remote field settings. Students will be prepared to take on leadership roles in environmental and land management, resource development and hazard assessment fields, as well as in applied and basic research.

我的研究小组致力于确定与极地地区的气候和永久冻土变化相关的过程和影响。我们结合水文学、地貌学、遥感和建模方法来确定不同的水文条件如何导致高土壤孔隙水压力，并预测这些条件将在哪里导致土地不稳定和干扰。永久冻土干扰是加拿大北部的一大危害，影响到社区和工业基础设施。我的团队开展的研究是必要的，以支持将减少永久冻土干扰对土地和水的影响的规划和设计。 这项研究计划的目的是显著提高我们对气候、水和土壤性质如何相互作用导致永久冻土景观不稳定的基础知识，并提高我们对易受干扰的土地的空间分布的理解。这项研究需要一种综合的方法，使用有重点的实地研究和仪器和采样来跟踪土壤中的水的运动，并测量土壤冰的季节性积累和融化。这些数据被用来确定天气、土壤和地形因素，这些因素导致可能导致扰动的高土壤孔压。我的研究计划还将使用先进的卫星和飞机遥感技术来有效地估计融化和推断广大地区的土壤冰含量。将这些数据集组合起来，以模拟土壤扰动敏感性的空间格局，并用过去扰动的野外制图进行验证。 该计划代表了一种创新的综合研究方法，以提高我们对导致永久冻土干扰和土地不稳定的过程和条件的理解，并将产生新的测绘战略，土地管理者可以利用这些战略将对基础设施的风险降至最低，避免对环境的影响。 拟议的计划将培训13名HQP，并向他们提供环境仪器、采样、测绘和统计建模技术方面的宝贵技术专长。此外，他们将获得广泛的外地规划、许可和管理技能方面的培训，并获得在偏远的外地环境中工作的丰富经验。学生将准备在环境和土地管理、资源开发和危险评估领域以及在应用和基础研究方面担任领导角色。