APPENDIX CC
WATERWORKS OFFICE
GENERAL STATISTICS
(1) Rainfall (in inches)
1970-71 1971-72 Rainfall recorded by Royal Observatory 89.55 76.40 Average Rainfall recorded in Waterworks catchments 89.75 65.90 Long Term Mean annual rainfall at the Royal Observatory ... 85.41 85.41(2) Yield (in million gallons)
Yield from catchment areas: 1970-71 1971-72 Old reservoirs ... 37,255 28,340 Plover Cove ... 15,985 10,706 Pumped from the River Indus and Extracted from the Muk Wu Wells... -- 2,816 742 Received from China by pipeline 14,791 15,491 Total 70,847 55,279 Less Losses: At Indus and Tai Po Tau Fabridam... 102 Total 70,745 55,279(3) Storage (in million gallons)
Total storage in the Colony's impounding reservoirs:
Quantity Stored 1st April, 1971 1st July, 1971 1st October, 1971 1st January, 1972 1st April, 1972 Old Reservoirs ... ... 14,307 10,771 7,623 Plover Cove 30,809 27,799 30,296 24,434 18,238 % Full 40.5 56.8 85.1 64.1 45.4 83.8 75.7 82.5 66.5 49.6(4) Consumption (in million gallons)
1970-71 1971-72 Urban areas 62,654 66,844 New Territories (minor supplies) ... ... Total ... ... Daily average 172.6 183.1 Highest daily consumption (8,760 hours) (8,784 hours) 205.4 214.9 Total 62,994 67,012 340 168APPENDIX CC
WATERWORKS OFFICE
GENERAL STATISTICS
(1) Rainfall (in inches)
1970-71
1971-72
Rainfall recorded by Royal Observatory
89.55
76.40
Average Rainfall recorded in Waterworks catchments Long Term Mean annual rainfall at the Royal
89.75
65.90
...
85.41
85.41
Observatory
(2) Yield (in million gallons)
Yield from catchment areas:
1970-71
1971-72
Old reservoirs
...
37,255
28,340
Plover Cove
...
...
15,985
10,706
Pumped from the River Indus and Extracted from the
Muk Wu Wells...
--
2,816
742
Received from China by pipeline
14,791
15,491
70,847
55,279
Less Losses:
At Indus and Tai Po Tau Fabridam...
102
Total
...
•
70,745
55,279
(3) Storage (in million gallons)
Total storage in the Colony's impounding reservoirs:
Quantity Stored
1st April, 1971
...
1st July, 1971
1st October, 1971
1st January, 1972 1st April, 1972
...
•
(4) Consumption (in million gallons)
Urban areas
New Territories (minor supplies)
Total
Daily average
Highest daily consumption
% Full
Old Plover Reservoirs Cove
Old
Plover
Reservoirs
Cove
6,805 30,809
40.5
83.8
9,552 27,799
56.8
75.7
...
14,307 30,296
85.1
82.5
10,771 24,434
64.1
66.5
7,623
18,238
45.4
49.6
1970-71
1971-72
62,654
66,844
...
...
...
201
...
...
(8,760 hours) (8,784 hours)
340
168
62,994
67,012
1970-71
1971-72
172.6
183.1
205.4
214.9
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