Rockfall simulations constitute the first step toward hazard assessments and can guide future rockfall prevention efforts. In this work, we assess impact of digital elevation model (DEM) resolution on accuracy numerical simulation outputs. For purpose, compared output obtained using 1 m, 2 m 3 UAV-derived DEMs, to two other models based coarser topographic data (a 5 DEM through interpolating co...

Our mesoscale simulation method [M. Robinson, S. Luding, and M. Ramaioli, submitted (2013)] for multiphase fluid-particle flows couples Smoothed Particle Hydrodynamics (SPH) and the Discrete Element Method (DEM) and enjoys the flexibility of meshless methods, such as being capable to handling free surface flows or flow around complex and/or moving geometries. We use this method to simulate thre...

This paper describes the effect of DEM data resolution on predictions from the SWAT model. Measured hydrologic, meteorological, watershed characteristics and water quality data from Moores Creek watershed (near Lincoln, AR, USA) were used in the simulation. The effect of input data resolution was evaluated by running seven scenarios at increasing DEM grid sizes (30 ð 30 m, 100 ð 100 m, 150 ð 15...

The paper presents the development of dynamic domain decomposition applied to hopper discharge simulation by the discrete element method (DEM). Parallel neighbour search algorithm, non-blocking interprocessor communication and dynamic load balancing are implemented in the DEM code. Parallel speed-up analysis is performed solving the complex hopper discharge problems containing 100000 and 300000...

Forest structure attributes produced from terrestrial laser scanning (TLS) rely on normalisation of the point cloud values from sensor coordinates to height above ground. One method to do this is through the derivation of an accurate and repeatable digital elevation model (DEM) from the TLS point cloud that is used to adjust the height. The primary aim of this paper was to test a number of TLS ...

Zusammenfassung. Es werden die Grundlagen eines computergrafischen Atlanten der menschlichen Anatomie (Virtual Human) dargestellt, der kinematische und funktionelle Eigenschaften aufweist. Nach der Generierung von Oberflächenmodellen des Skeletts werden diese für eine interaktiv gesteuerte Kinematik aufbereitet. Die Navigation und Interaktion mit dem Modell erfolgt über eine VRML Oberfläche. Zu...

TerraSAR-X add-on for Digital Elevation Measurements (TanDEM-X) mission is designed to generate 3-D images of the Earth as first bistatic synthetic aperture radar (SAR). However, few quantitative studies TanDEM-X digital elevation model (DEM) quality validation have been conducted specifically in China. This article presents an iterative method high-resolution DEMs and assesses vertical accurac...

In the past few years, the Himalayan region has experienced a number of floods from glacial lakes, and the neighboring areas were severely damaged. Therefore it is important to continue monitoring glaciers or creating simulation of floods to prevent the damages in those regions. The DEM is very useful for studying these hazardous problems. In this study, we tried to generate DEM by TerraSAR-X i...