mohammadreza shamsaeifar

Natural disasters, such as earthquakes, can disrupt water distribution systems, leading to prolonged water shortages and associated crises. Tehran, with its high seismic risk, necessitates robust emergency water management solutions to ensure adequate potable and non-potable water supply during critical conditions.

Using GIS and WaterGEMS software, we evaluated the design and placement of emergency water reservoirs in ASP Town, Shahriar. Hydraulic modeling was conducted to optimize the piping, pressure, and flow dynamics for potable water supply under emergency conditions. Additionally, non-potable water reservoirs utilizing treated wastewater were designed for irrigation and fire suppression, incorporating solar-powered pumping systems to ensure energy efficiency.

A 50 m3 cylindrical steel emergency tank, connected to the urban water network, was proposed to provide 3 L of potable water per person for three days in a crisis. The system includes solar panels, a 250-W pump, and a hydraulic shut-off valve to maintain water quality and availability. For non-potable uses, a wastewater reservoir with a variable-speed pumping station supports irrigation and supplies 12 fire hydrants, meeting pressure and flow requirements during emergencies.

This study highlights the importance of integrated water management strategies, including solar-powered systems and treated wastewater reuse, to improve resilience against natural disasters. The proposed designs ensure sustainable water supply and effective crisis management for drinking and non-potable applications in high-risk urban areas.

The purpose of this study is to determine the effect of utilitarian and hedonic motivation on organizational knowledge sharing through social networks in the Southwest Water and Sewage Company of Tehran Province. This is an applied research method from the objective point of view and a descriptive survey from the point of view of the data collection method. The statistical population of the research is the managers and employees of the Southwest Water and Sewage Company of Tehran Province with 515 people. Sampling method, class and sample size are determined by the Cochran formula 220. A standard questionnaire is used to collect data. Validity of the questionnaire is confirmed by the opinion of the organization's experts and its reliability by Cronbach's alpha. In order to analyze the collected data, Smart PLS software, which is a second-generation software for structural equations, has been used. The results indicated that utilitarian and hedonic motivation is needed to share external and internal knowledge through organizational social networks. Also, to share the internal knowledge of knowledge, functional motivation is proposed.