Calculation of saturated and expected population

    For a town with a population of 2 lakhs, a water supply scheme is to be designed. The maximum daily demand may be assumed as 200 litre/capita/day. The storage reservoir is situated 5 km away from the town Assuming loss of head from source to town as 10 m and coefficient of friction for the pipe material as 0.012, recommend the size of supply main 50% of daily demand has to be pumped in 8 hours for the proposed scheme. q2.A city has the following recorded population : Year 1971: 60000 Year 1991: 120000 Year 2011: 180000 Estimate (i) the saturation population and (ii) expected population in the year 2031 by logistic curve method.