Urban water management using of water resources planning MODSIM model

Hosseinpour, Samira; Dehghani, Amirahmad; Zahiri, Abdolreza; Shoriyan, Mojtaba; Meftah Halghi, Mehdi

Urban water management using of water resources planning MODSIM model

Document Type : Complete scientific research article

Authors

¹ Msc of Gorgan University

² Associate Prf., Dept. of water Structure,Gorgan University of Agricultural Sciences and Natural Resources

³ Assistant Prof., Dept. of water Structure, Gorgan University of Agricultural Sciences and Natural Resources

⁴ Assistant Prof., Dept. of Water and Environmental Engineering, Shahid Beheshti University

Abstract

Background and objectives: Increasing need for water is the result of population growth and urban development, which demands a comprehensive programming for sufficient amount and appropriate quality of water. Modeling is one of the necessary elements of management and planning for water resources and use. Integrated mathematical quality-quantity water models are suitable tool to analysis various water resources management options. MODSIM is a decision support system for the analysis programming of long-term, mid-term and short-term functions that is used in the basin, inter-basin, drinking water and etc The most important urban drinking water supply problems in Gorgan are lack of exploitation of surface and groundwater sources for drinking, groundwater restrictions to supply drinking water of Gorgan, severe drop in groundwater table, increasing trend of drinking water demand, ample water exploitation in agriculture sector in downstream and its effect on declining drinking water and improper recharge aquifers consequently causing disqualification in aquifers and salinity in wells. Offer appropriate solutions is essential for the next horizon, comprehensive study of the sources and the percentage of losses incurred on the desired horizon. The aim of this research is to analysis water resources management of drinking water of Gorgan assessing different managerial scenarios.
Material and methods: In this study drinking water of Gorgan city was evaluated in short-term, mid-term and long-term periods by means of MODSIM model and the city's zoning to provide allowable pressure and prevent the leakage in the network. Model calibration was done for 2012 and 2013 on a daily scale and eventually the model was assessed on the basis of criteria’s such as reliability and vulnerability. Hence by using various scenarios the future management of drinking water was evaluated.
Results: According to results, in all scenarios the 1st pressure zone (the most northern part of Gorgan) and 8-10 zones (the most southern part of Gorgan) have high reliability and low vulnerability indexes. In addition if the water supply conditions remain same as current (the reference scenario) in 2021 with a population increase of 7.2 percent compared to 2012, the reliability index and vulnerability index would be 7.2 percent and 50000 cubic meters per day.
Conclusion: Using MODSIM model has been really successful in simulation and management of drinking water resources hence using this model and linking it to other software’s such as those ones related to groundwater and water quality is suggested. According to the result of model and scenarios, it is possible to inspect future water condition and recommend managerial strategies.

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