Modelling the steady state of sewage networks as a support tool for their planning and analysis
Journal Title: Operations Research and Decisions - Year 2015, Vol 25, Issue 3
Abstract
Fundamental questions connected with the modelling of communal sewage networks have been considered and formulas used to model the functioning of the basic network have been analyzed. The problem described concerns gravitational sewage networks divided by nodes into branches and sectors. Simulation of the steady state functioning of sewage networks is commonly carried out on the basis of nomograms in the form of charts, in which the relations between network parameters like channel diameters, flow rates, hydraulic slopes and flow velocities are described. In traditional design, the values of such parameters are simply read from such nomogram chart tables. Another way of simulating the functioning of a network is the use of professional software, like SWMM, that models sewage flows along the channels by means of differential equations de-scribing the movement of fluids. In both approaches, the user is a mechanical operator of a “black box” procedure. In this paper, another way of simulating the functioning of sewage net-works has been presented. Numerical solutions of nonlinear equations describing the physical phenomena of sewage flows are applied and explained. The presented algorithms were developed to model the steady state of a sewage network enabling a quick analysis of the network parameters and the possibility of fast, simple and comprehensible network modeling and design.
Authors and Affiliations
Grażyna PETRICZEK, Jan STUDZIŃSKI, Lucyna BOGDAN
Keywords
Related Articles
- EP ID EP323598
- DOI -
- Views 31
- Downloads 0
Energy prosumers: profiling the energy microgeneration market in Lower Silesia, Poland
Microgeneration of energy has the potential to become an important component of the energy policy of many governments, because it may substantially lower carbon emissions and reduce the need for new infrastructure. Never...
Tendencies in research on innovation in low–technology sectors
The aim of the article is to identify and analyse the main tendencies in and subject matter of research on innovation in low-technology sectors. The data analysed come from the Scopus database covering 1977–2015. The aut...
Solving IRPs using location based heuristics
Inventory routing problems (IRPs) occur where vendor managed inventory replenishment strategies are implemented in supply chains. These problems are characterized by the presence of both transportation and inventory cons...
Some notes on the properties of inconsistency indices in pairwise comparisons
Pairwise comparisons are an important tool of modern (multiple criteria) decision making. Since human judgments are often inconsistent, many studies have focused on the means of expressing and measuring this inconsistenc...
Solving linear fractional multilevel programs
The linear fractional multilevel programming (LFMP) problem has been studied and it has been proved that an optimal solution to this problem occurs at a boundary feasible extreme point. Hence the Kth-best algorithm can b...