Using a Nested Watershed Approach to Assess Cumulative Effects of Forest Disturbance on Hydrology in a Sub-Boreal Forested Watershed

使用嵌套流域方法评估森林干扰对亚寒带森林流域水文的累积影响

• 批准号: RGPIN-2015-06032
• 负责人: Wei, Xiaohua
• 金额: $ 1.97万
• 依托单位: University of British Columbia
• 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=633623
• 关键词: Using; Nested; Watershed; Approach; Assess

The impact of forest disturbance on hydrology has long been an important research topic, but the majority of this research has been conducted on small watersheds (<100 km2) with rare examination of large ones (>1000 km2). With the support from my NSERC Discovery Grants (2005-2012; 2013/2015), we have successfully developed a method for separating relative contributions of forest disturbance and climate variability to hydrology, and the applications of the method have been published on the high-impact journals (e.g., Water Resources Research, Journal of Hydrology). Our progress has led an important research question, which will be addressed in this proposal. As our previous studies normally treated large watersheds as “black boxes”, they would not lead to understanding of underlying mechanisms and processes which govern the cumulative hydrological responses to forest disturbance in large watersheds. Thus, a critical research need is to assess how forest disturbance cumulatively influences hydrology over different spatial and temporal scales. To address this question, a nested watershed approach is required.

森林干扰对水文的影响一直是一个重要的研究课题，但大多数研究都是在小流域（<100平方公里）进行的，很少对大流域（>1000平方公里）进行研究。在我的NSERC发现赠款（2005-2012; 2013/2015）的支持下，我们成功地开发了一种方法，用于分离森林干扰和气候变化对水文的相对贡献，该方法的应用已发表在高影响力期刊上（例如，水资源研究，水文学杂志）。我们的进展引发了一个重要的研究问题，该问题将在本提案中得到解决。由于我们以前的研究通常把大流域视为“黑箱”，它们不会导致对大流域森林干扰累积水文响应的基本机制和过程的理解。因此，一个关键的研究需要是评估森林干扰如何累积影响水文在不同的空间和时间尺度。为了解决这个问题，需要一个嵌套的分水岭方法。