Consider a city with current population of 1 million (year 2009). We are planning to develop the water supply facilities of this city during the next 20 years. The water consumption per capita for this city is presently 320 L/day. The share of different consumption components relative to water consumption per capita is given in Table 6. 14. Available water supply resources of this city include two surface reservoirs with an average water allocation capacity 100 and 40 MCM/year. The population growth rate of this city has been determined as 2. 3%/year. How would the state of water resources availability be in the year 2029 regarding to water consumption?

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TABLE 6.14 The Share of Different Consumption Components Relative to Water Use Per Capita for the City of Problem 21 Share of Use (%) Water Use Per Capita Users 56 9 8 9 180 Residential 30 Public 25 Industrial commercial 30 17 55 100 320 Public green space Losses Sum