Snow hydrology

雪水文

• 批准号: 184176-2009
• 负责人: Pomeroy, John
• 金额: $ 4.23万
• 依托单位: University of Saskatchewan
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2013
• 资助国家: 加拿大
• 起止时间: 2013-01-01 至 2014-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=523051
• 关键词: Snow; hydrology

Snowmelt is the most significant contribution to water resources in most of Canada and so is not only vital to Canada's water security, but forms the basis for many impacts of climate change on Canadian ecosystems, communities and economies. It is changing rapidly in the mountains, prairies and north due to climate and land use change. Models of snowcover are used in many hydrological, meteorological and ecological applications. Snow processes have been identified as an area of continuing weakness in models. The long-term objective of this research is to reduce uncertainty in describing and predicting snow hydrology by improving the fundamental understanding of snow. The specific objectives of this research are to: 1) Improve the understanding of snowfall and energy inputs to snow, 2) Improve the understanding of snowmelt and meltwater release, 3) Better describe snow-vegetation interactions. The approach will combine innovative field observation programmes in the Mountains, North and Prairies with laboratory advances in observational techniques and mathematical simulations of the fundamental snow hydrology processes. The field programme, observational technique advance and computer modelling will contribute to all three objectives through common sites and suite of computational platforms. The field observation programme will use established research basins (high elevation -Marmot Creek, Alberta; high latitude - Wolf Creek, Yukon; prairie/woodland - Smith Creek, Saskatchewan) to supplement baseline measurements with detailed physical measurements. Observational advances will focus primarily on the use of sound waves in snow to determine the internal structure and wetness of the snowpack. New models will be evaluated in the Cold Regions Hydrological Modelling platform (CRHM) to determine the degree to which soil moisture and streamflow predictions in cold regions are improved by improved model physical process descriptions.

融雪是对加拿大大部分地区水资源的最大贡献，因此不仅对加拿大的水安全至关重要，而且是气候变化对加拿大生态系统、社区和经济产生许多影响的基础。由于气候和土地利用的变化，山区、草原和北部地区的气候变化很快。积雪模型被用于许多水文、气象和生态应用中。降雪过程已被确定为模型中持续薄弱的领域。这项研究的长期目标是通过提高对雪的基本理解来减少描述和预测积雪水文学的不确定性。本研究的具体目标是：1)提高对降雪和雪的能量输入的理解；2)提高对积雪融化和融水释放的理解；3)更好地描述雪与植被的相互作用。该办法将把山区、北部和草原地区的创新实地观测方案与实验室观测技术的进步和基本雪水文学过程的数学模拟结合起来。实地方案、观测技术进步和计算机模拟将通过共同地点和一套计算平台为所有这三个目标作出贡献。实地观测方案将利用已建立的研究盆地(高海拔--艾伯塔省旱旱河；高纬度--沃尔夫克里克，育空；草原/林地--史密斯克里克，萨斯喀彻温省)，用详细的物理测量来补充基线测量。观测方面的进展将主要集中在利用积雪中的声波来确定积雪的内部结构和湿度。将在寒冷地区水文模拟平台(CRHM)评估新模型，以确定改进的模型物理过程描述在多大程度上改善了寒冷地区的土壤水分和径流预报。