Plover Cove and the data collected will be used in conjunction with the older Royal Observatory station at King's Park, Kowloon, to assess evaporation losses from Plover Cove Reservoir.
7.47. Models of two stream gauging stations were made and tested by the University of Hong Kong. In both cases there were significant differences between the theoretical head discharge curve previously assumed and the curve derived from the model work. A triangle flume was built at Tai Tam East catchwater to record catchwater performance through a wide range of flows. Digital recorders producing a punched paper tape record were installed at four reservoirs to measure overflow. 7.48. All significant hydrological information collected up to March, 1965, was summarized and described in a report entitled 'Hong Kong Rainfall and Runoff, Volume I'. Much of the computation work for this report was done on the Commerce and Industry Department's computer.
Water Resources Survey Section
7.49. Two major studies on which the Survey unit concentrated in the year were regulation studies and operation studies. The former studies were concerned with the assessment of the amount of supply that can be given at any time for a given reservoir system at various degrees of security. The latter studies provided the rule for the daily amount to be drawn from each reservoir to make up the supply. An electronic computer was used in carrying out the regulation study. From preliminary results of the regulation studies, an interim report on Development of Resources was prepared and submitted to the Water Resources Policy Committee. The practicability of re-use of water was looked into, and general notes on this subject were prepared and discussed.
Planning Section
7.50. Supply proposals and estimates for Tsing Yi development and Castle Peak new town were completed. Plans were prepared showing the proposed fixed major water supply zones for Hong Kong Island and future requirements for trunk mains and principal distribution mains for the urban area between Kennedy Town and Chai Wan. Proposals for the system of trunk mains radiating from Hong Kong landfall of the future Plover Cove Scheme Cross Harbour Main were prepared. In addition preliminary reports for the extension of the salt water flushing requirement of the Western, Central and Shau Kei Wan districts were completed.
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