This study presents an analysis of physical experiments on the evolution and development of drainage networks inducted by an initial knickpoint. To this purpose, some experiments were carried out by using a 1.5 m by 1.5 m box-basin-simulator filled with an erodible material of known textures and properties. A system of microsprinklers generated an almost uniform artificial precipitation. Simulations were performed at a constant rainfall rate. Digital elevation models of the evolving landscape were obtained through detailed soil surveys with a laser pointer and/or a laser scanner. Based on the data collected, the scaling properties of the system are analysed and compared with those of natural basins. Findings are provided mainly in terms of Hortonian’s laws, Hack’s relation, and fractal geometry. In addition, comparisons between (quasi)equilibrium and transient stages are also highlighted.
Morphological aspects of laboratory-generated drainage networks
OLIVETO, Giuseppe;
2008-01-01
Abstract
This study presents an analysis of physical experiments on the evolution and development of drainage networks inducted by an initial knickpoint. To this purpose, some experiments were carried out by using a 1.5 m by 1.5 m box-basin-simulator filled with an erodible material of known textures and properties. A system of microsprinklers generated an almost uniform artificial precipitation. Simulations were performed at a constant rainfall rate. Digital elevation models of the evolving landscape were obtained through detailed soil surveys with a laser pointer and/or a laser scanner. Based on the data collected, the scaling properties of the system are analysed and compared with those of natural basins. Findings are provided mainly in terms of Hortonian’s laws, Hack’s relation, and fractal geometry. In addition, comparisons between (quasi)equilibrium and transient stages are also highlighted.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
