FEEDBACK MECHANISMS BETWEEN MORPHOLOGY, STORM DURATION AND HYDROGRAPH SHAPES

P. Sólyom

ABSTRACT - Relationships between runoff hydrographs discharged from drainage basins shaped by precipitation events of different characteristic duration are analysed. Feedbacks between hydrograph shapes and landscape shaping storm duration are identified: hydrographs resulting in catchments shaped by typically short and intense storms are thinner and peakier for a given precipitation input than hydrographs of catchments in environments of longlasting storms. This finding can be used to extend the well known relationship between catchment planform and hydrograph shape to include the effect of storm duration on hydrograph shape and morphogenesis. The study is based on numerical modelling of landscape evolution and rainfall routing.

Keywords: morphology, precipitation, storms, hydrograph shape

Solyom_MORPHOLOGY STORM DURATION HYDROGRAPH SHAPES.pdf