La gestion des eaux pluviales coule de source, de l’amont à l’aval, du rural à l’urbain et vice-versa
Autor
Poulard, C.
Berthie,r E.
Breil, P.
Labbas, M.
Henine, H.
Hauchard, E.
Radzicki, Krzysztof
Opublikowane w
Novatech 2013 : 8ème Conférence internationale sur les techniques et stratégies durables pour la gestion des eaux urbaines par temps de pluie / ed. E. Brelot
Data wydania
2013
Miejsce wydania
Lyon
Wydawca
GRAIE
Język
francuski
Uwagi
The original publication is available from NOVATECH 2013: documents.irevues.inist.fr/handle/2042/51321
How different is “urban” stormwater source control from “rural” runoff management? The processes are identical in the two contexts, and urban BMPs have their rural counterparts. Feedback analysis, including pragmatic considerations, should therefore be shared more widely. Our literature review shows that a common key issue is the assessment of the effect of structural measures at catchment scale, whether on flood mitigation or on water quality. In both contexts, studies -using simulated or observed data-, draw the same conclusions about the high sensitivity of the hydrological response of a combination of structures to their spatial distribution and to the space and time pattern of rainfall. Modelling is an invaluable tool to study the hydrological behaviour of existing or projected structures, but is a hard task when it involves various and scattered objects, and processes at different scales complexity is thus maximised in peri-urban contexts. Building distributed input for these models is the topic of several recent studies. Both communities can thus learn much from each another, but furthermore they have to work together. In many cases, fluxes – flood or pollution- often cross urban/rural limits, and must thus be studied at a broader scale. Whilst each sub-catchment is a source of hazard for the land downstream, it also provides opportunities for solutions. This (re)assesses the importance of defining the appropriate scale of work and involving all the relevant services, as a prerequisite for efficient flood risk or pollution management.
