Sessional_Paper_1907 — Page 1092

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The quantity of water stored in the impounding reservoirs on the 1st of January amounted to 249,740,000 gallons. It reached a minimum on the 1st of April, when it amounted to 62,427,000 gallons.

The reservoirs were at or over their permanent overflow levels on the following <lates :

Tytam,

Tytam Byewash, Wongncichong,

Pokfulam,

16th September to 20th Noveinber.

17th

16th

20th October.

19

"

9th

"

29th May and

6th Sept.

19th

>>

The total quantity of water remaining in the reservoirs at the close of the year was 373,224,000 gallons.

The temporary pump for pumping up to the gauge basin the waters of the streams in the lower part of the Tytam Valley was in operation during the following periods and yielded the quantities stated :-

1st January to 19th April,

36,398,000 gallons.

20th August to 12th September,

7,817,000

>7

13th November to 31st December,

28,960,000

Total,

73,175,000

Use was again made, so far as the capacity of the temporary pump permitted, of the water stored in the reservoir in course of construction.

The quantity so stored at the close of the year was 120,000,000 gallons but, as it can- not be made available for use until the pumps and rising main are completed, it has not been included in the tabular statements appended.

During the typhoon of the 18th September, which was accompanied by a rainfall of 4.56 inches, one of the stone piers supporting the sluice boards on the dam of the Tytam Byewash Reservoir was carried away, thus reducing its impounding capacity by 23 million gallons. A temporary pier was, however, built before the effect of the September rains had passed and the reservoir was refilled to its full capacity.

The total rainfall for the year at the Kowloon Observatory was 77.77 inches. The rains began somewhat early, 9.79 inches having fallen in April, and the wet season closed very favourably, from a Waterworks point of view, with 30.59 inches in September.

The total quantity of water supplied during the year was 1,318,763,000 gallons filtered and 34,304,000 gallons unfiltered, making a grand total of 1,353,067,000 gallons or 214,241,000 gallons less than in 1905.

The

average consumption of filtered water per head per day under the various condi- tions of supply, with an estimated population of 233,300, is given below :—

Average for whole year,

"}

during constant supply,

15.8 gallons. 18.2

""

"J

during the application of intermittent supply to the Rider Main Districts only,

15.7

37

37

during the application of universal intermit-

tent supply,

9.7

77

Full details of the consumption, contents of the reservoirs, &c., will be found in Appendices C and D.

The Analyses made by the Government Analyst shew that the quality of the water throughout the year was excellent. Bacteriological examinations were begun in August and have been carried out regularly since. The results of these are also very satisfactory.