Hydrologic recovery in forest landscapes

森林景观的水文恢复

• 批准号: 852-2010
• 负责人: Buttle, James
• 金额: $ 1.24万
• 依托单位: Trent University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2011
• 资助国家: 加拿大
• 起止时间: 2011-01-01 至 2012-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=473387
• 关键词: Hydrologic; recovery; forest; landscapes

Land use change can pose serious challenges for sustainable water resource management, which in turn requires information on the time needed for various hydrologic components to return to their original condition after disturbance (hydrologic recovery). I propose a combined experimental-modelling approach to examine hydrologic recovery in a managed forest landscape in southern Ontario (the Ganaraska Forest) on the crest of the Oak Ridges Moraine, a key hydrogeologic feature of the region. I seek to understand how hydrologic properties and processes differ between dominant land covers, and establish how they change with hydrologic recovery in the context of a changing climate in this region. The Forest provides a mosaic of agricultural land and forest stands of differing type and age on similar soils and surficial geologic deposits under the same climate that facilitates the study of how the landscape's key hydrologic components change with forest age (a surrogate of hydrologic recovery). Water storage and fluxes (e.g. interception, surface runoff, recharge) will be examined for non-forested areas and forest stands of differing type and age. Alternative approaches to estimating recharge will be assessed to establish their potential for providing cost-effective and spatially-distributed recharge estimates for the Oak Ridges Moraine as well as other critical groundwater recharge areas in Canada. The field program will provide data to parameterize and test models of water infiltration, storage and recharge that will be run under different climatic conditions to examine interactions between land cover, climate, topography, soils and hydrogeology in controlling hydrologic recovery in this landscape. This work will provide an integrated field and modelling-based study of the hydrologic recovery of forest landscapes that addresses all aspects of the forest water balance over long time scales. The resulting information and recharge estimation tools will assist water resource management on the Oak Ridges Moraine as well as in other forest landscapes in Canada currently experiencing natural and human-induced impacts.

土地利用变化可能对可持续水资源管理构成严重挑战，而可持续水资源管理又需要有关各种水文成分在扰动后恢复到原始状态（水文恢复）所需时间的信息。我提出了一个综合的实验建模方法来研究水文恢复在管理的森林景观在南部安大略（加纳拉斯卡森林）的橡树岭冰碛，该地区的一个关键的水文地质特征的波峰。我试图了解水文特性和过程之间的差异占主导地位的土地覆盖，并建立他们如何改变水文恢复在气候变化的背景下，在这一地区。森林提供了一个马赛克的农业用地和森林站的不同类型和年龄在类似的土壤和表层地质沉积物在相同的气候，促进景观的关键水文组成部分如何随着森林年龄的变化（水文恢复的替代品）的研究。将审查非森林地区和不同类型和年龄的森林的水储存和流量（例如拦截、地表径流、补给）。将评估估计补给的替代方法，以确定其为橡树岭冰碛以及加拿大其他重要地下水补给区提供具有成本效益和空间分布的补给估计的潜力。实地项目将为参数化和水渗透、储存和补给的测试模型提供数据，这些模型将在不同的气候条件下运行，以研究土地覆盖、气候、地形、土壤和水文地质之间的相互作用，从而控制这一景观的水文恢复。这项工作将对森林景观的水文恢复进行综合实地和基于模型的研究，解决长期森林水平衡的所有方面。由此产生的信息和补给估计工具将有助于对橡树岭冰碛以及加拿大目前正在经历自然和人为影响的其他森林景观进行水资源管理。