The relationship between linearised 3D and 2DH models for tidally dominated shallow waters

The water motion computed using 3D and 2DH models in tidally dominated shallow waters can, in some cases, differ significantly. In 2DH models, bed friction is typically parametrised in terms of the depth-averaged velocity, whereas in 3D models, typically the near-bed velocity is used. This difference causes the bed shear stress in 2DH models...

New Techniques and Methods for Modelling, Visualization, and Analysis of a 3D City

The recent years observe the vast development in new techniques and methods for modelling, visualization, and analysis of 3D digital cities, as the need of digital twins of urban environment in different applications and simulations has been increased dramatically. This special issue attempts to give an overview of the recent progress and...

Point Cloud Based Visibility Analysis: first experimental results

Visibility computed from a LiDAR point cloud offers several advantages compared to using a gridded digital height-model. With a higher resolution and detailed information, point cloud data can provide precise analysis as well as an opportunity to avoid the process of generating a surface representation or a solid model. Also a better inclusion...

Digital Models – Proposal for the Interactive Representation of Urban Centres: The downtown Lisbon City Engine model

The idea of ‘city’ has now surpassed its physical concept. The emergence of the Internet and the growing development of information and communication technologies (ICT) have changed the behaviour of our society in the past decade and revolutionised the traditional ways of representing space. The classic 2D (floor plans, sections and elevations)...

Calibration suspended sediment model Markermeer

In deze studie is een computermodel voor het Markermeer opgezet, ingeregeld en gevalideerd. Het model beschrijft dynamsch de stroming van water, waterpeilen, golven en slib in het water en in de bodem. Het model is gecalibreerd voorde periode augustus 2007 - april 2008 en gevalideerd voor de periode daarna tot september 2008. In deze periode...

Modelling the seasonal dynamics of SPM with a simple algorithm for the buffering of fines in a sandy seabed

This paper discusses the application of a simple algorithm for the buffering of fines in a sandy seabed. A second layer is introduced in which fines may be stored during calm weather and from which fines may be resuspended during storms. The algorithm is applied first in a one-dimensional vertical (1DV) point model at a location in the North Sea...