It is often argued that urban areas play a significant role in catchment hydrology, but previous studies reported disparate results of urbanization impacts on stream flow. This might stem either from the difficulty to quantify the historical flow changes attributed to urbanization only (and not climate variability) or from the inability to decipher...
Projections of changes in the hydrological cycle from global hydrological models (GHMs) driven by global climate models (GCMs) are critical for understanding future occurrence of hydrological extremes. However, uncertainties remain large and need to be better assessed. In particular, recent studies have pointed to a considerable contribution of GHM...
This paper investigates the uncertainties linked to climate change impacts on runoff in four mesoscale basins (900 to 1800 km(2)) in the Mediterranean region. Runoff simulations were based on a daily conceptual model including a snow module. The model was calibrated and validated according to a differential split-sample test over a 20-year period a...
This work aims to evaluate the performance of a hydrological balance model in a watershed located in northern Tunisia (wadi Sejnane, 378 km(2)) in present climate conditions using input variables provided by four regional climate models. A modified version (MBBH) of the lumped and single layer surface model BBH (Bucket with Bottom Hole model, in wh...
During a flood event over a karst watershed, the connections between surface and ground waters appear to be complex ones. The karst may attenuate surface floods by absorbing water or contribute to the surface flood by direct contribution of karst waters in the rivers (perennial and overflowing springs) and by diffuse resurgence along the hillslopes...
Dans la vallée du fleuve Sénégal et le delta intérieur du fleuve Niger, la crue annuelle inonde un vaste lit majeur par des chemins d'écoulement complexes. Pour représenter la propagation d'écoulement entre lits mineur et majeur sur ces zones très plates, on utilise un modèle sans données topographiques initialement développé pour les lits mineurs ...
Intermittent rivers and their ecosystem will have to face climate change during the 21st century, with possible more frequent and more severe droughts leading to changes in biodiversity. The Asse River basin is one of the tributaries of the Durance River basin experiencing dry conditions. A framework was developed to simulate flows and biodiversity...
L'augmentation des surfaces imperméables et les modifications des chemins d'écoulement de l'eau par les réseaux d'assainissement unitaires et pluviaux ont un impact sur l'hydrologie des bassins versants. Les bassins périurbains, qui s'urbanisent rapidement, y sont particulièrement sensibles. Les outils de modélisation hydrologique spatialisés, simu...
Published in Boundary-Layer Meteorology
Wind-flow dynamics has been extensively studied over horizontally uniform canopies, but agricultural plantations structured in rows such as vineyards have received less attention. Here, the wind flow over a vineyard is studied in neutral stratification from both large-eddy simulation (LES) and in situ measurements. The impact of row structure on th...
