I want to calculate the volecity head on the service head A small coastal town i

Question

I want to calculate the volecity head on the service head

A small coastal town in Queensland is subjected to an increasing permanent population and also a transient influx of tourists during the summer period. Council is already receiving complaints of poor water supply. The water supply system components comprise a trunk main from source to the service reservoir, the service reservoir and service mains to the consumption areas. Two consumption areas A and B at different elevations are gravity supplied from the service reservoir C. The service reservoir has a useable capacity of 6 ML and is gravity fed from a source D located 10 km away. Source D can provide 1000 ML per annum. All other information is shown in the sketch below. Ductile iron pipes are used and have the following dimensions.

Explanation / Answer

Head water column can be calculated by dividing dynamic pressure with specific weight of water like. hw = pd / w.

= (f v2/2) / w g  

  = v2/ 2 g   

where

hw = head water (m Water, ft Water)

w = w g = specific weight water (N/m3, lb/ft3)

where

w = density of water (kg/m3, lb/ft3)

g = acceleration of gravity (32.174 ft/s2, 9.81 m/s2)

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