Samaneh Seifollahi-Aghmiuni

Water shortages are caused by hydrological droughts and by the disruption of the operation of water distribution networks (WDNs). The water pressure and residual chlorine concentration are examples of quantitative and qualitative indexes, respectively, of a WDN’s performance. This work considers quality and quantity variables simultaneously in the operation of WDNs under water shortages. An optimization model is developed to find the optimum water allocation schedule in WDNs. The objectives of the optimization model are maximizing the number of node-times in which the chlorine concentration is in the allowable range, and maximizing the number of supply nodes under desirable pressure. These objectives satisfy the principle of justice in water distribution under water shortage. The optimization model was solved for a real WDN under different scenarios using the honey-bee mating optimization (HBMO) algorithm linked to a hydraulic simulator. The performance of the developed model was compared to an op...

Components of a water resource system (WRS) can be assessed and evaluated by employing simulation and optimization techniques. In general, simulation models are used to evaluate the behavior and function of systems under existing conditions. This paper presents a generic formulation for simulating reservoir systems at the watershed scale. The formulation is based on the continuity equation and can be used for every type of simulation or optimization problem that addresses reservoir systems by considering existing priorities of resource allocation and demand supply. The developed formulation can simulate reservoir systems using both operation policies, the standard operation policy (SOP) and a rule curve. Also, different outlets with their elevation can be considered in each reservoir for water release to supply various objectives. The concept of integrated management has been used in this formulation so that the effects of different system factors on each other, including various resources and con...

Reservoir systems are built to deliver multiple functions, such as water supply, energy production, flood control, recreation, and fisheries protection in a safe, economic, and efficient manner. This paper presents a sample three-reservoir system with comprehensive physical and hydrologic characteristics. The sample reservoir system considers energy production, water supply, and recreational and flood-control objectives. The results from the operation of this paper’s reservoir system under four different scenarios show that this system’s characteristics and structure conform well with actual reservoir operational processes. The reliabilities associated with meeting reservoir-operation objectives were calculated for the sample reservoir system for the four operational scenarios, ranging from independent reservoir operation with single objectives to integrated reservoir operation with multiple objectives. The results show acceptable ranges of reliability for the three objectives considered under eac...