Up- and Downscaling Model Approaches for Water Relations in Forest Management from Plot to Landscape Level
Water is one of the key drivers of ecosystem processes and forest growth. In large parts of the world water is a limiting factor and determines the species distributions, productivity and risks to our forests. To mimic the behaviour of ecosystem processes forest ecosystem models have been developed. Such models allow the integration of different processes such as the water cycle to analyse and study ecosystem behaviour. One important issue of such exercises is the integration of processes acting at different temporal and spatial scales.
The purpose of this paper is to discuss scaling issues important for deriving the water cycle in managed forests across Europe. Specifically it relates to how water-related processes may be integrated so that point or plot information may be generalised to large scale applications. After a general discussion on scaling issues four examples related to scaling water relations within forest management are presented: (i) groundwater infiltration and its impact on forest growth, (ii) water runoff from forest roads, (iii) catchment water yield modeling as it is related to forest cover and (iv) wildfire risk assessment.
KeywordsForest Management Vapor Pressure Deficit Coarse Scale Forest Road Fire Danger
Work presented in this chapter was compiled specifically for COST Action FP 0601 ‘Forest Management and the Water Cycle’, with individual examples drawn from work at BOKU University of Natural Resources and Applied Life Sciences Institute of Silviculture (Vienna), the Austrian Forest Fire Research Initiative (AFFRI) and the Commonwealth Scientific and Industrial Research Organisation Land and Water Division (Canberra).
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