HR: 0800h
AN: H11F-0352    [Abstracts]
TI: Parameterising a semi-distributed hydrological model from hillslope and catchment geomorphology
AU: * Bogaart, P W
EM: patrick.bogaart@wur.nl
AF: Wageningen University, Hydrology and Quantitative Water Management Group, Nieuwe Kanaal 11, Wageningen, 6709 PA Netherlands
AU: Troch, P A
EM: peter.troch@wur.nl
AF: Wageningen University, Hydrology and Quantitative Water Management Group, Nieuwe Kanaal 11, Wageningen, 6709 PA Netherlands
AU: Hilberts, A G
EM: arno.hilberts@wur.nl
AF: Wageningen University, Hydrology and Quantitative Water Management Group, Nieuwe Kanaal 11, Wageningen, 6709 PA Netherlands
AU: Boll, J
EM: jboll@uidaho.edu
AF: Department of Biological and Agricultural Engineering, University of Idaho PO Box 440904, Moscow, ID 83844-0904 United States
AB: The geomorphic structure of landscapes controls the hydrological response in a number of ways: hillslope length controls total amounts of water supply to footslope areas; hillslope curvature controls acceleration and/or convergence/divergence of flow paths; soil cover thickness distribution controls subsurface water transport capacity; channel network topology controls the geomorphic dispersion of channel flow, etc. Although this has been known for a long time, there are many open questions relating to the use of morphometric information in hydrological modelling. One of the fundamental questions of hydrogeomorphology is how an understanding of the spatial structure of hillslopes and catchments can be used to help parameterising semi-distributed hydrological models. In these models, the two-dimensional spatial domain is collapsed to a one-dimensional profile. The ordinate of these profiles can be the downhill-distance-towards-the-channel (e.g.\ within the hillslope-storage Boussinesq model [{\it Troch et al.} (2003), {\it Water Resour. Res.}, {\it 39}(11), 1316, doi:10.1029/2002WR001728.]) or any other `similarity' index, such as the topographic index (e.g.\ within TOPMODEL) On this poster, we present results of morphometric analyses of various physiographic regions within the US, and an application of the hillslope-storage Boussinesq model to a field site in Troy, ID. Topics addressed include: the spatial distribution and connectivity of hillslope curvature; hillslope outline shape vs. internal curvature; the landscape treated as one large hillslope folded around the channel network; and disequilibrium between hillslope morphology and current channel network extent.
DE: 3210 Modeling
DE: 1824 Geomorphology (1625)
DE: 1831 Groundwater quality
DE: 1848 Networks
DE: 1860 Runoff and streamflow
SC: Hydrology [H]
MN: 2004 AGU Fall Meeting