Abstract
The classical approaches to water and solute transport in soils have been developed under the assumption of homogeneity of the properties and boundary conditions. Often, this assumption is not valid for field conditions. Because heterogeneity can not be neglected for water and solute transport, methods for considering scale dependent spatial variability are needed. Different approaches to handling variability and uncertainty are presented here. The concept of effective parameters is discussed using different approaches. As the concept of effective parameters is not applicable in all cases, a method for considering the internal variability of the most important parameter is introduced. It is shown that upscaling can not be performed using a single method. Depending on data quality and data availability and on the problem that has to be solved, an appropriate upscaling method has to be chosen from the different available approaches.
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Diekkrüger, B. (2003). Upscaling of Hydrological Models by Means of Parameter Aggregation Technique. In: Neugebauer, H.J., Simmer, C. (eds) Dynamics of Multiscale Earth Systems. Lecture Notes in Earth Sciences, vol 97. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-45256-7_9
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DOI: https://doi.org/10.1007/3-540-45256-7_9
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