Inicio  /  Water  /  Núm: Vol. 11 Par: PP (PP)  /  Artículo

Small-Scale Rainfall Variability Impacts Analyzed by Fully-Distributed Model Using C-Band and X-Band Radar Data

Igor Paz    
Bernard Willinger    
Auguste Gires    
Bianca Alves de Souza    
Laurent Monier    
Hervé Cardinal    
Bruno Tisserand    
Ioulia Tchiguirinskaia and Daniel Schertzer    


Recent studies have highlighted the need for high resolution rainfall measurements for better modelling of urban and peri-urban catchment responses. In this work, we used a fully-distributed model called ?Multi-Hydro? to study small-scale rainfall variability and its hydrological impacts. The catchment modelled is a semi-urban area located in the southwest region of Paris, an area that has been previously partially validated. At this time, we make some changes to the model, henceforth using its drainage system globally, and we investigate the influence of small-scale rainfall variability by modelling three rainfall events with two different rainfall data inputs: the C-band radar data provided by Météo-France at a 1 km × 1 km × 5 min resolution, and the new X-band radar (recently installed at Ecole des Ponts, France) data at a resolution of 250 m × 250 m × 3.41 min, thereby presenting the gains of better resolution (with the help of Universal Multifractals). Finally, we compare the Multi-Hydro hydrological results with those obtained using an operational semi-distributed model called ?Optim Sim? over the same area to revalidate Multi-Hydro modelling, and discuss the model?s limitations and the impacts of data quality and resolution, observing the difficulties associated with semi-distributed models when accounting the spatial variability of weather radar data. This work concludes that it may be useful in future to improve rainfall data acquisition, aiming for better spatio-temporal resolution (now achieved by the weather dual-polarized X-band radars) and data quality when considering small-scale rainfall variability, and to merge deterministic, fully-distributed and stochastic models into a hybrid model which would be capable of taking this small-scale rainfall variability into account.

 Artículos similares

Ferdinand K. J. Oberle, Peter W. Swarzenski, Curt D. Storlazzi     Pág. 1 - 18
Groundwater resources of low-lying atoll islands are threatened due to short-term and long-term changes in rainfall, wave climate, and sea level. A better understanding of how these forcings affect the limited groundwater resources was explored on Roi-Na... ver más
Revista: Water

Fabian Reichl, Jochen Hack     Pág. 1 - 15
Small-scale hydropower is a robust and reliable form of sustainable energy supply in remote areas. On the one hand, the potential for hydropower generation depends on the specific climate in a given place, and precipitation above all. On the other hand, ... ver más
Revista: Water

Wiebke Bebermeier, Julia Meister, Chandana Rohana Withanachchi, Ingo Middelhaufe, Brigitta Schütt     Pág. 1 - 16
In the dry zone of Sri Lanka, human-made reservoirs have served for the collection, storage and distribution of rainfall and runoff and provide irrigation water for the cultivation of paddy for 2000 years. This paper introduces the layout and function of... ver más
Revista: Water

Anne Springer, Annette Eicker, Anika Bettge, Jürgen Kusche, Andreas Hense     Pág. 1 - 24
Precipitation and evapotranspiration, and in particular the precipitation minus evapotranspiration deficit ( P-E ), are climate variables that may be better represented in reanalyses based on numerical weather prediction (NWP) models than in other datase... ver más
Revista: Water

Julian J. Zemke    
Revista: Hydrology