Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1016/j.advwatres.2009.06.005
Title (Primary) A sensitivity analysis of Hortonian flow
Author Delfs, J.-O.; Park, C.-H.; Kolditz, O. ORCID logo
Source Titel Advances in Water Resources
Year 2009
Department ENVINF
Volume 32
Issue 9
Page From 1386
Page To 1395
Language englisch
Keywords Sensitivity analysis; Smith and Woolhiser experiment; Coupled hydrosystem modeling; Infiltration excess overland flow
Abstract We present a sensitivity analysis for infiltration excess (Hortonian) overland flow based on a classic laboratory experiment by Smith and Woolhiser [Smith RE, Woolhiser DA. Overland flow on an infiltrating surface. Water Resour Res 1971;7(4):899-913]. The model components of the compartment approach are comprised of a diffusive wave approximation to the Saint-Venant equations for overland flow, a Richards model for flow in the variably saturated zone, and an interface coupling concept that combines the two components. In the coupling scheme a hydraulic interface is introduced to allow the definition of an exchange flux between the surface and the unsaturated zone. The effects of friction processes, soil capillarity, hydraulic interface, and vertical soil discretization on both infiltration and runoff prediction are investigated in detail. The corresponding sensitivity analysis is conducted using a small-perturbation method. As a result the importance of the hydraulic processes and related parameters are evaluated for the coupled hydrosystem.
Persistent UFZ Identifier
Delfs, J.-O., Park, C.-H., Kolditz, O. (2009):
A sensitivity analysis of Hortonian flow
Adv. Water Resour. 32 (9), 1386 - 1395 10.1016/j.advwatres.2009.06.005