HR: 09:40h
AN: H21F-07    [Abstracts]
TI: A Geomorphic Approach for Modelling Basin-Scale Hydrologic and Chemical Responses in River Basins
AU: Rinaldo, A
EM: rinaldo@idra.unipd.it
AF: Dipartimento di Ingegneria Idraulica, Marittima, Ambientale e Geotecnica, Universitá di Padova, via Loredan 20, PADOVA, I-35131 Italy
AU: * Botter, G
EM: botter@idra.unipd.it
AF: Dipartimento di Ingegneria Idraulica, Marittima, Ambientale e Geotecnica, Universitá di Padova, via Loredan 20, PADOVA, I-35131 Italy
AU: Uccelli, A
EM: uccelli@idra.unipd.it
AF: Dipartimento di Ingegneria Idraulica, Marittima, Ambientale e Geotecnica, Universitá di Padova, via Loredan 20, PADOVA, I-35131 Italy
AU: Settin, T
EM: settin@idra.unipd.it
AF: Dipartimento di Ingegneria Idraulica, Marittima, Ambientale e Geotecnica, Universitá di Padova, via Loredan 20, PADOVA, I-35131 Italy
AU: Bertuzzo, E
EM: bertuzzo@idra.unipd.it
AF: Dipartimento di Ingegneria Idraulica, Marittima, Ambientale e Geotecnica, Universitá di Padova, via Loredan 20, PADOVA, I-35131 Italy
AU: Marani, M
EM: marani@idra.unipd.it
AF: Dipartimento di Ingegneria Idraulica, Marittima, Ambientale e Geotecnica, Universitá di Padova, via Loredan 20, PADOVA, I-35131 Italy
AB: In this paper, we address a theoretical framework for continuous geomorphic models of the hydrologic response, specifically aimed at coupling hydrologic processes with the catchment-scale generation and transport of solutes. The mobilization of solutes from soil is assumed to be controlled by the residence time of the carrier hydrologic flow, in a well mixed approximation appropriate in cases (like basin-scale transport phenomena) when the characteristic size of the injection area is larger than that of heterogeneous features. The framework proposed is applied to a significant case study, focussing on the nitrate leaching through the hydrologic response in a mixed catchment located in Northern Italy. Comparison of modelling predictions with field data (i.e. fluxes of carrier flow and solute nitrates) suggests that the model proposed is capable to properly describe large-scale transport phenomena driven by spatially distributed hydrologic fields (e.g. rainfall patterns in space and time, drainage pathways, soil textures and uses, heterogeneous distributions of nitrates dissolved in the soil moisture prone to hydrologic leaching). Sample Montecarlo modes of application of the model are also discussed, where hydrologic forcings and external nitrates applications (through fertilizations) are treated as random processes.
DE: 1869 Stochastic hydrology
DE: 1871 Surface water quality
SC: Hydrology [H]
MN: Fall Meeting 2005