Articles | Volume 15, issue 11
Hydrol. Earth Syst. Sci., 15, 3275–3291, 2011

Special issue: Towards theories that link catchment structures and model...

Hydrol. Earth Syst. Sci., 15, 3275–3291, 2011

Research article 03 Nov 2011

Research article | 03 Nov 2011

Hydrological landscape classification: investigating the performance of HAND based landscape classifications in a central European meso-scale catchment

S. Gharari1, M. Hrachowitz1, F. Fenicia2, and H. H. G. Savenije1 S. Gharari et al.
  • 1Delft University of Technology, Faculty of Civil Engineering and Geosciences, Water Resources Section, Delft, The Netherlands
  • 2Public Research Center – Gabriel Lippmann, Belvaux, Luxembourg

Abstract. This paper presents a detailed performance and sensitivity analysis of a recently developed hydrological landscape classification method based on dominant runoff mechanisms. Three landscape classes are distinguished: wetland, hillslope and plateau, corresponding to three dominant hydrological regimes: saturation excess overland flow, storage excess sub-surface flow, and deep percolation. Topography, geology and land use hold the key to identifying these landscapes. The height above the nearest drainage (HAND) and the surface slope, which can be easily obtained from a digital elevation model, appear to be the dominant topographical controls for hydrological classification. In this paper several indicators for classification are tested as well as their sensitivity to scale and resolution of observed points (sample size). The best results are obtained by the simple use of HAND and slope. The results obtained compared well with the topographical wetness index. The HAND based landscape classification appears to be an efficient method to ''read the landscape'' on the basis of which conceptual models can be developed.