@article{fdi:010079149, title = {{A}n original urban land cover representation and its effects on rain event-based runoff and {TSS} modelling}, author = {{R}io, {M}. and {S}alles, {C}. and {C}ernesson, {F}. and {M}archand, {P}ierre and {T}ournoud, {M}. {G}.}, editor = {}, language = {{ENG}}, abstract = {{D}uring rainfall events, a wide range of contaminants generated by urban areas are transferred into rivers. {M}odelling tools are increasingly required by decision makers to assess the effects of urban development and mitigation measures on urban runoff quality. {H}owever, representing the spatial heterogeneity of urban land cover in water quality modelling is a real challenge. {T}his study presents a methodology to analyze and characterize the land cover of an urban catchment within a water quality model. {T}he application site is the urban river {V}erdanson located in {M}ontpellier city ({F}rance), where the climate is {M}editerranean. {F}irstly, a time effective original method of identifying homogeneous urban surfaces in terms of build-up/wash-off processes from an existing land-use map and aerial photo interpretation is presented. {S}econdly, the sensitivity of model outputs to the discretization of a catchment into homogeneous land cover types, called {W}ater quality {R}esponse {U}nits ({WQRU}s), is tested. {T}he results reveal that discretizing the catchment into {WQRU}s enhances the relevance of hydrological outputs and provide more flexibility for a calibration of {T}otal {S}uspended {S}olids wash-off parameters. {T}he findings open interesting opportunities to integrate catchment-scale land cover data into the modelling of wash-off processes and allow urban runoff managers to assess the influence of urban land use planning scenarios on water quality.}, keywords = {{H}ydrological model ; {M}editerranean climate ; {SWMM} ; {U}rbanized catchment ; {T}otal {S}uspended {S}olids ; {W}ash-off ; {FRANCE} ; {MONTPELLIER} ; {ZONE} {MEDITERRANEENNE}}, booktitle = {}, journal = {{J}ournal of {H}ydrology}, volume = {586}, numero = {}, pages = {art. 124865 [14 p.]}, ISSN = {0022-1694}, year = {2020}, DOI = {10.1016/j.jhydrol.2020.124865}, URL = {https://www.documentation.ird.fr/hor/fdi:010079149}, }