Influence of Level of Detail (LOD) in Hydraulic Model Geometry with Demand Allocation by Voronoi Polygon Method on Chosen Parameters

Abstract

Deciding on the level of model complexity is one of the first decisions that has to be made before engaging in the creation of a functional hydraulic model of a municipal water supply system. There are a number of influencing factors such as time needed to simulate the network, time needed to create such model and ease of use. The aim of this work is to prove that level of detail has influence on parameters such as pressure at measurement points, spread of flow speed and flow volume at different parts of mains. The Voronoi polygon method is one of the basic demand allocation methods, which, in the event of a different number of junctions depending on model complexity, has to generate a varying number of polygons of different sizes used to aggregate the demands.

Influence of Hydraulic Model Complexity on Results of Water Age and Quality Simulation in Municipal Water Supply Systems

“…As presented in Figure 1; Figure 2, this method of demand allocation has much lesser accuracy than models with simpler geometries. [26]. Red lines represent borders of Voronoi polygons, water distribution systems is shown as blue lines while green points represent the water demand address points.…”

“…Figure 4. Zoom of hydraulic model that shows how inaccurate the Voronoi polygon method is for simplified model graphs[26]. Red lines represent borders of Voronoi polygons, water distribution systems is shown as blue lines while green points represent the water demand address points.…”