قيمت گذاري آب شرب شهري بر اساس الگوي رمزي (مطالعه موردي شهر نيشابور)

Pricing of Urban Drinking Water Using Ramsey Model: A Case Study of Neyshabour

Water is a necessary and scarce good that requires new strategies for allocation and optimal use. we. Water pricing and levying suitable tariffs subject to social welfare maximization are the economic solution to this problem. In this study, we have considered available tariffs in domestic water sector of the city of Neyshabour. According to current tariff problems, new tariffs are offered by using Ramsey Model with the target of maximization of social welfare. Finally, Ramsey tariffs are modified based on two scenarios. In the first one, we incur less cost to customers with paying a subsidy about 135.5 Rial/mvyear by government. In this scenario, the minimum cost is zero for users with consumption less than 5 m3/month and the maximum cost is 1216 Rial/rrrʹzmonth for users with consumption more than 30 m3/month. In the second one, losses related to low income groupʹs paying are compensated by high income users. So, minimum cost is zero for users with consumption less then 5 m3/month, and maximum cost is 1980 Rial/mvrnonth for users with consumption more than 40 m3/month. In these two scenarios, the water and wastewater company would be in the break even point.