Formation Technique of a 3D Ground Topographic Numerical Model for Environmental Impact Prediction using Digital GIS Databases, Contour Lines and Constrained Delaunay Triangulation

This paper presents a technique forming a three-dimensional (3D) topographic model to predict environmental impact using GIS databases, employing the constrained Delaunay triangulation method and contour lines. Benchmark numerical tests demonstrate that compared to using Delaunay triangulation alone, the proposed technique reduces mesh-generation time and effectively manages the number of GIS inputs needed for accurate mesh resolution. Thus, this method proves beneficial for efficiently generating 3D topographic numerical models, particularly in large domains, enhancing environmental impact prediction capabilities.