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Hack's law is reviewed, emphasizing its implications for the elongation of river basins as well as its connections with their fractal characteristics. The relation between Hack's law and the internal structure of river basins is investigated experimentally through digital elevation models. It is found that Hack's exponent, elongation, and some relevant(More)
In recent years a new theory of the evolution of drainage networks and associated landscapes has emerged, mainly in connection with the development of fractal geometry and of self-organized criticality (SOC) concepts. This theory has much improved our understanding of the mechanisms which determine the structure of natural landscapes and their dynamics of(More)
  • Giuseppe Formetta, Giovanna Capparelli, Olaf David, Timothy R Green, Riccardo Rigon, Kevin Strychar
  • 2016
The integration of a spatial process model into an environmental modeling framework can enhance the model's capabilities. This paper describes a general methodology for integrating environmental models into the Object Modeling System (OMS) regardless of the model's complexity, the programming language, and the operating system used. We present the(More)
The observation could be used to reduce the model uncertainties with data assimilation. If the observation cannot cover the whole model area due to spatial availability or instrument ability, how to do data assimilation at locations not covered by observation? Two commonly used strategies were firstly described: One is covariance localization (CL); the(More)
The paper presents the integration of the GEOtop model into the Object Modeling System version 3.0 (OMS3) and its application. GEOtop is a physically based spatially distributed rainfall-runoff model, performing water and energy budgets. The OMS3 integration widened the application range of GEOtop as presented in the paper. By running GEOtop as an OMS3(More)
The paper presents two applications of the JGrass-NewAge model in order to investigate the influence of an explicit channel routing model on the discharge simulation. The semi-distributed, component based hydrological model JGrass-NewAge is based on the Object Modeling System version 3.0 (OMS3). OMS3, which facilitates exchange of model components, was used(More)
Remote sensing data can provide images of snow covered areas and, therefore, it is possible to follow the time evolution of snow melting spatial patterns with increasing spatial and temporal resolution. Snow cover patterns are dominated by the complex interplay of topography, radiation forcings and atmospheric turbulent transfer processes. The snow cover(More)
It is shown how rescaled width functions (Rinaldo et al., 1995; D'Odorico et al., 1996) are built by means of Grass and some other custom programs. From them the width function based instantaneous unit hydrograph, WGIUH, is obtained. In the end, it is discussed the possible generalization of the procedure to include spatial soil moisture variability. Width(More)
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