A morpho-climatic instantaneous unit hydrograph model for urban catchments based on the kinematic wave approximation

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dc.contributor.authorGironas, Jorge
dc.contributor.authorNiemann, Jeffrey D.
dc.contributor.authorRoesner, Larry A.
dc.contributor.authorRodriguez, Fabrice
dc.contributor.authorAndrieu, Herve
dc.date.accessioned2024-01-10T12:37:31Z
dc.date.available2024-01-10T12:37:31Z
dc.date.issued2009
dc.description.abstractStormwater models are valuable tools in urban planning as well as stormwater system design and management. Although the hydraulic simulation of pipes and channels in these models is often quite sophisticated, the hydrologic simulation of the flow contributing to the hydraulic elements is frequently greatly simplified. Hydrologic simulation of urban catchments is made particularly complex due to the presence of features such as streets, small pipes, and channels. In this study, we develop a new model called the U-McIUH (Urban Morpho-climatic Instantaneous Unit Hydrograph), which defines the IUH as the probability density function of the travel time from a random location in the urban terrain to the outlet. Flow paths are extracted from a specially processed digital elevation model that incorporates hillslopes, streets, pipes, and channels, and travel times are computed in each cell using the average wave celerity from kinematic wave theory. These expressions depend on the upstream contribution of flow and the excess rainfall intensity, so they incorporate the so-called climatic dependence of the IUH, which is the dependence of the unit hydrograph on the rainfall intensity. Rainfall pulses of different intensities are convoluted with their respective IUH and superimposed to generate the response to a given storm event. The application of the model to a real catchment provides good reproduction of observed hydrographs, suggesting that the U-McIUH is able to capture some significant hydrologic properties of the catchment. The model is studied by analyzing the effects of (1) the upstream contribution of flow on the travel time formulation, (2) the variation of flow velocities within the urban catchment, (3) the non-linear dependence of the IUH on the rainfall intensity (i.e. the climatic dependence), and (4) the spatial distribution of imperviousness. Overall, these results suggest that the presence of artificial elements in urban watersheds has a significant role in determining the travel times and thus the hydrologic response of the watershed. (C) 2009 Elsevier B.V. All rights reserved.
dc.description.funderCivil Infrastructure System Laboratory at Colorado State University
dc.fechaingreso.objetodigital27-03-2024
dc.format.extent18 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.jhydrol.2009.08.030
dc.identifier.issn0022-1694
dc.identifier.urihttps://doi.org/10.1016/j.jhydrol.2009.08.030
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/76865
dc.identifier.wosidWOS:000271666700008
dc.information.autorucIngeniería;Gironás J;S/I;1681
dc.issue.numero3-4
dc.language.isoen
dc.nota.accesocontenido parcial
dc.pagina.final334
dc.pagina.inicio317
dc.publisherELSEVIER SCIENCE BV
dc.revistaJOURNAL OF HYDROLOGY
dc.rightsacceso restringido
dc.subjectUrban hydrology
dc.subjectStormwater drainage system
dc.subjectSpatially distributed
dc.subjectDigital elevation model
dc.subjectNon-linear response
dc.subjectTravel time
dc.subjectTRAVEL-TIME METHOD
dc.subjectHYDROLOGIC RESPONSE
dc.subjectDISTRIBUTED MODEL
dc.subjectUPSTREAM INFLOW
dc.subjectGIS
dc.subjectRUNOFF
dc.subjectGEOMORPHOLOGY
dc.subjectWATERSHEDS
dc.subjectDERIVATION
dc.subjectCHANNEL
dc.subject.ods13 Climate Action
dc.subject.ods06 Clean Water and Sanitation
dc.subject.odspa13 Acción por el clima
dc.subject.odspa06 Agua limpia y saneamiento
dc.titleA morpho-climatic instantaneous unit hydrograph model for urban catchments based on the kinematic wave approximation
dc.typeartículo
dc.volumen377
sipa.codpersvinculados1681
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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