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Hydrology and Earth System Sciences An interactive open-access journal of the European Geosciences Union
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Volume 15, issue 6
Hydrol. Earth Syst. Sci., 15, 1909–1919, 2011
https://doi.org/10.5194/hess-15-1909-2011
© Author(s) 2011. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue: Catchment classification and PUB

Hydrol. Earth Syst. Sci., 15, 1909–1919, 2011
https://doi.org/10.5194/hess-15-1909-2011
© Author(s) 2011. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 22 Jun 2011

Research article | 22 Jun 2011

Hydropedological insights when considering catchment classification

J. Bouma1, P. Droogers2, M. P. W. Sonneveld3, C. J. Ritsema4,5, J. E. Hunink2, W. W. Immerzeel2, and S. Kauffman6 J. Bouma et al.
  • 1em.Professor of soil science, Wageningen University, The Netherlands
  • 2FutureWater, Wageningen, The Netherlands
  • 3Land Dynamics Group, Wageningen University, The Netherlands
  • 4Alterra, Wageningen, The Netherlands
  • 5Land Degradation and Development Group, Wageningen University, The Netherlands
  • 6ISRIC Wageningen, The Netherlands

Abstract. Soil classification systems are analysed to explore the potential of developing classification systems for catchments. Soil classifications are useful to create systematic order in the overwhelming quantity of different soils in the world and to extrapolate data available for a given soil type to soils elsewhere with identical classifications. This principle also applies to catchments. However, to be useful, soil classifications have to be based on permanent characteristics as formed by the soil forming factors over often very long periods of time. When defining permanent catchment characteristics, discharge data would therefore appear to be less suitable. But permanent soil characteristics do not necessarily match with characteristics and parameters needed for functional soil characterization focusing, for example, on catchment hydrology. Hydropedology has made contributions towards the required functional characterization of soils as is illustrated for three recent hydrological catchment studies. However, much still needs to be learned about the physical behaviour of anisotropic, heterogeneous soils with varying soil structures during the year and about spatial and temporal variability. The suggestion is made therefore to first focus on improving simulation of catchment hydrology, possibly incorporating hydropedological expertise, before embarking on a catchment classification effort which involves major input of time and involves the risk of distraction. In doing so, we suggest to also define other characteristics for catchment performance than the traditionally measured discharge rates. Such characteristics may well be derived from societal issues being studied, as is illustrated for the Green Water Credits program.

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