were worked out and the results were submitted to the Water Resources Policy Committee to obtain a decision on the criteria which should be used in assessing reservoir yields. The report also presented an economic comparison of four possible sequences of development of major water supply schemes.
7.37. An estimate of future demand was made by projecting observed consumption in the past two years. A further estimate was made by breaking down the Census and Statistical Planning Department's population projection into different classes of consumers and applying per capita consumption figures derived from observed values.
Planning Section
7.38. Proposals were made to provide improved supplies to the eastern high level areas of Hong Kong Island and to Stanley and Repulse Bay. A treated water supply was planned for Shek O. Proposals for increasing the supply to Yuen Long were also completed with estimates of cost. A preliminary layout of trunk distribution mains for Sha Tin New Town Development Stage I was prepared with proposals for a supply of treated water to the Chinese University at Sha Tin.
7.39. Proposals for the extension of salt water supply in the Hong Kong Island Central District were completed. Tests were carried out to determine the optimum chlorine dosage required to suppress marine growth in salt water mains. Preliminary proposals for a salt water supply in South Kowloon were framed.
General
MECHANICAL AND ELECTRICAL DIVISION
Chief Engineer (Acting):
R. J. JOHNSON, A.M.I.Mech.E., A.M.I.W.E.
7.40. The Division continued to operate and maintain all Waterworks plant and equipment and, in association with other divisions as appropriate, to design, procure and install all new plant for Waterworks installations, other than those designed and supervised by consulting engineers.
New Works
7.41. During the year, seven new installations were completed and work was commenced on a further four. Orders were placed for
84
were worked out and the results were submitted to the Water Resources Policy Committee to obtain a decision on the criteria which should be used in assessing reservoir yields. The report also presented an economic comparison of four possible sequences of development of major water supply schemes.
7.37. An estimate of future demand was made by projecting observed consumption in the past two years. A further estimate was made by breaking down the Census and Statistical Planning Department's popula- tion projection into different classes of consumers and applying per capita consumption figures derived from observed values.
Planning Section
7.38. Proposals were made to provide improved supplies to the eastern high level areas of Hong Kong Island and to Stanley and Repulse Bay. A treated water supply was planned for Shek O. Proposals for increasing the supply to Yuen Long were also completed with estimates of cost. A preliminary layout of trunk distribution mains for Sha Tin New Town Development Stage I was prepared with proposals for a supply of treated water to the Chinese University at Sha Tin.
7.39. Proposals for the extension of salt water supply in the Hong Kong Island Central District were completed. Tests were carried out to determine the optimum chlorine dosage required to suppress marine growth in salt water mains. Preliminary proposals for a salt water supply in South Kowloon were framed.
General
MECHANICAL AND ELECTRICAL DIVISION
Chief Engineer (Acting):
R. J. JOHNSON, A.M.I.Mech.E., A.M.I.W.E.
7.40. The Division continued to operate and maintain all Waterworks plant and equipment and, in association with other divisions as appro- priate, to design, procure and install all new plant for Waterworks installations, other than those designed and supervised by consulting engineers.
New Works
7.41. During the year, seven new installations were completed and work was commenced on a further four. Orders were placed for
84
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