1,720,965 research outputs found
Meta-Water: un software di dimensionamento delle reti di distribuzione idrica con uso di tecniche meta-euristiche
No full textOptimal valve location in rehabilitation and desing of pipe networks using scatter search metaheuristic procedure
No full textIn recent years, a number of articles have demonstrated the fact that optimization techniques based on meta-heuristic algorithms are particularly promising for solving problems related to water systems design and management. On the basis of results obtained, this new methodology may be considered as a useful alternative to traditional approaches, based on trial-and-error or mathematical programming methods. In this paper a hybrid optimization-simulation methodology is proposed for the optimal design and management of water distribution networks. This approach can be considered truly promising, especially when addressing the problem of optimal valve location for leakage minimisation when rehabilitation of existing networks is required or when dimensioning new pipes. On the basis of the results reported in previous publications [4], [12], [13], this paper illustrates a Scatter-Search metaheuristic procedure developed for pipe networks in order to analyze and evaluate a huge number of possible combinations in the set of the allowed discrete alternatives without involving the complicated mathematical structures of the classical design approach. The authors have developed a software toolkit which applies the Scatter Search method to pipe networks and is able to recognize optimal combinations of appropriate localization and adjustment of valve parameters, as well as dimensioning new pipes, setting pumping plants and providing practical information as a decision support tool in a user-friendly manner. The solver toolkit has been called Meta-Water (M-W) and the paper presents some benchmarks and real case application result
Scatter Search Metaheuristic Approach For Water Distribution Systems Design And Rehabilitation
No full textLocation and Calibration of Valves in Water Distribution Networks Using a Scatter-Search Meta-heuristic Approach
No full textLocalizzazione e taratura delle valvole di riduzione della pressione nei problemi di espansione e riabilitazione delle reti
No full textUna metodologia mista di simulazione e ottimizzazione per la gestione ottima delle reti di distribuzione acquedottistiche
No full textAnalisi di una procedura per l'ottimizzazione dell'inserimento e taratura delle valvole di riduzione della pressione nelle reti di distribuzione
No full textFlood damage risk assessment optimizing a flood mitigation system
Get PDFFlood risk management plan for potentially damaged areas is a main requirement from the European Directive 2007/60. Therefore, assessment and evaluation of the potential flood damages in quantitative terms need to be defined in mapped flood risk areas. Quantitative evaluation should be in agreement with the required cost-benefit analysis as a rational decision-making tool optimizing the flood mitigation system. In the first part of the paper, analyses are reported, based on recent flood events that had taken place in the Europe, in order to obtain depth-damage functions to apply in the Sardinia region (Italy). Flood damage functions are not still available for every European country and the paper analysed previous studies to define depth-damage functions for this region. The paper focuses then on the validation of the proposed depth-damage functions. The available flood data and reported damages of the massive storm happened in South-Est Sardinia the 22nd of October 2008 are analysed. Data analysis allows to compute the total economic losses for different land uses conditions and to compare with the evaluated ones. In the last part of the paper, expected damages evaluated using depth-damages functions are used for the Coghinas river lowlands valley. The regional Water District Authority defining the flood risk management plan considers this river basin as a pilot area. Applying hydraulic models to floodplain river flow allows evaluation of the expected flood damages using the depth-damage functions. Moreover, the procedure allows developing the cost-benefit analysis in order to justify different design scenarios and gives a rational decision-making tool optimizing the flood mitigation syste
Scatter Search Metaheuristic Approach For Valves Location And Calibration Using The Meta-Water Toolkit
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