Debris flow mitigation - adapting to climate change and wildfires

减缓泥石流——适应气候变化和野火

• 批准号: 570441-2021
• 负责人: Tannant, Dwayne
• 金额: $ 8.74万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Alliance Grants
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=722091
• 关键词: Debris; flow; mitigation; adapting; climate

In western Canada, climate change is causing hotter and dry weather as well as periods of higher intensity precipitation. These conditions conspire to create larger and more severe wildfires followed by more destructive and widely distributed post-wildfire debris flows and floods. A burnt watershed increases surface runoff from rain or snowmelt. The excessive runoff generates debris flows and debris floods that overwhelm stream channels and damage property and infrastructure on alluvial fans near the valley bottoms. There is an urgent need to conduct research to develop mitigation measures for post-wildfire debris flows/floods in an effort to build resiliency to future events triggered by climate extremes.The proposed research aims to identify sites at the highest risk and recommend cost-effective geohazard mitigation methods to protect people and properties, especially those in rural and First Nations communities. Necessary tasks to achieve these objectives include developing better debris flow/flood simulation models, calibrating these models using careful documentation of recent debris flow sites, developing new techniques to create spatially accurate hazard maps, and creating easy-to-understand public guidelines for geohazard protection.

在加拿大西部，气候变化导致天气变得更加炎热和干燥，以及一段时期的强降水。 这些条件共同造成了规模更大、更严重的野火，进而引发破坏性更大、分布更广的野火后泥石流和洪水。 烧毁的流域会增加雨水或融雪造成的地表径流。 过多的径流会产生泥石流和泥石流，淹没河道并损坏谷底附近冲积扇的财产和基础设施。迫切需要开展研究，制定野火后泥石流/洪水的缓解措施，以增强对极端气候引发的未来事件的抵御能力。拟议的研究旨在确定风险最高的地点，并提出具有成本效益的建议保护人民和财产的地质灾害缓解方法，特别是农村和原住民社区的人民和财产。 实现这些目标的必要任务包括开发更好的泥石流/洪水模拟模型，使用最近泥石流现场的仔细记录来校准这些模型，开发新技术来创建空间精确的灾害地图，以及创建易于理解的地质灾害保护公共指南。