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PORTAIL D'INFORMATION GÉOGRAPHIQUE

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  • A modelling approach is presented to predict local scour under time varying flow conditions. The model is based on a number of hypotheses concerning the characteristics of the flow hydrograph, the temporal evolution of the scour and the geometry
  • of the scour hole. A key assumption is that, at any time, the scour depth evolves at the same rate as in an equivalent steady flow. Experimental data are presented that show the scour hole development downstream of bed sills due to flood hydrographs follow
  • in the rising limb of the flow hydrograph. This suggests that the underlying assumptions used in the modelling approach are appropriate.
  • 2011
  • Efficiency of the geomorphic instantaneous unit hydrograph method in flood hydrograph simulation
  • of a geomorphologic model with Snyder, SCS, Trianglar, Rosso and Geomorphoclimatic Unit hydrographs, and in addition to determine the shape and dimensions of outlet runoff hydrographs. The peak time and peak flow of outlet runoff in the models were then compared
  • , and the model that most efficiently estimated hydrograph of outlet flow for similar regions was determined. The study's results confirm the high efficiency of the Geomorphoclimatic Unit Hydrograph and its ability to increase simulation accuracy for runoff
  • and hydrographs.
  • 2011
  • Spatial variation in drainage characteristics and geomorphic instantaneous unit hydrograph (GIUH); implications for watershed management—A case study of the Varada River basin, Northern Karnataka
  • such as basin area, drainage density, bifurcation ratio, circularity ratio, constant of channel maintenance etc. These differences reflect variation in the hydrological process and geomorphologic instantaneous unit hydrograph (GIUH) of different sub-basins
  • 2011
  • , they discuss the possible coupling of geomorphology with hydrographic features to influence the overall productivity of the region and the importance of spatial fishery management in sustaining that productivity.
  • 2011
  • This work aims to characterize the quaternary tectonic activity of the Foussana trough and their effect on the spatio-temporal distribution of the sedimentary series and the hydrographic network organization by using morphological and geological
  • 2011
  • over the upper part of the bank. The saltmarsh deposits, consisting mainly of clay and organic matter, have a high resistance to flow-induced erosion. Short-term hydrographic deployments revealed that the tidal currents and waves recorded were
  • 2011