Q 25.
1,984.98 million gallons were delivered from the Shing Mun Valley through the Tunnels into the Reception and Byewash Reservoirs, but a percentage of this quantity could not be stored and ran to waste. The minimum monthly yield was in February when the quantity delivered was 71.22 million gallons.
A total of 3,031.17 million gallons was filtered. 1,250.46 were filtered by the Slow Sand Beds and the remainder, 1,780.71 million gallons, by the Paterson Rapid Gravity Plant at Shek Li Pui.
The total quantity of water supplied to Kowloon during the year was 2,404.40 million gallons (exclusive of 95.64 million gallons supplied to Water Boats at Lai Chi Kok) which gives an average daily consumption of 6.59 million gallons or 19.4 gallons per head per day based on an estimated population of 340,000. Details are given in Table IX.
The quantity of water stored in the impounding reservoirs on 1st January was 573.12 million gallons and a minimum of 165.22 million gallons was reached on 29th May.
The reservoirs were at or above their permanent overflow levels for the following periods:-
Reservoirs Capacity to permanent overflow level (million gallons) Overflow periods Kowloon 352.50 171 days at various times between 1st January and 18th December. Kowloon Byewash 185.50 33 days at various times between 28th July and 21st October. Shek Li Pui 116.10 99 days at various times between 26th July and 4th November. Shing Mun Reception 33.15 125 days at various times between 13th April and 31st December.The quantity of water in storage at the end of the year was 628.87 million gallons.