462
24
|S, — Stream. {M. = Main.
Size of Syphon
in inches.
HILL DISTRICT.
Gallons.
Brought forward,
9,229
1 S.
1
M.
41⁄2
Barker Road,
Near Mountain Lodge,
I
M. 4
No. 6 Police Station,
I
M. 4
Des Vœux Villas,
M. 4
Government Pavillious,
1
M. 4
Rural Building Lot No. 7, Taikoo,..........
M. 4
No. 14, Plantation Road,
15
1
M. 4
Peak Church,
1
M. 4
Magazine Gap, in Plantation Road,
112
112
110
110
63
81
125
94
110
250
943
GRAND TOTAL,
10,284
As to the necessity of additional flushing. Sea-water.
Gulleys and traps.
The total capacity, of those which are fed from the water-works, amounts to 7,718 gallons. Supose that these discharge twice a day (some usually discharge but once), then the total consumption of potable water will be 15,436 gallons a day.
The remainder are supplied from nullahıs, or streams, and their joint capacity amounts to 2,566 gallons. I am decidedly of opinion that more use might be made of the water of nullahs and streams but I should be inclined to reserve it for the Drains.
70. It has been suggested that more flushing is desirable, and that sea-water might be used for this purpose. I am, however, of opinion that the Street Sewers (saving and excepting those low level sewers, already referred to) require little or no more flushing, than they get at present. It is the House Sewers that require flushing. If these are kept clean, by adequate flushing, then the street-sewers will take care of themselves; if they have proper gradients, as they certainly have, in all the upper parts of the town, I do not consider that it would be well to go to the expense of introducing a supply of sea water throughout the town, merely to flush the Street Sewers. Chinese houses, if properly constructed, with scavenging- passages in rear, practically, have no house sewers. In European houses, the consumption of water is sufficient to keep both House and Street-Sewers clean. Of course, it would be a great improvement, if every house Chinese or otherwise was provided with a water-closet or flushing tank. To provide a complete network of distributary pipes, for salt water, all over the town, so as to reach every tenement, would be exceedingly costly. Again, there is little information as to the durability of cast and wrought-iron piping, when used in connection with sea-water. It is conceivable that some relatively costly material, such as lead or copper, might be required, for service-pipes at least. Altogether I do not consider that the advantages of intro- ducing a duplicate supply, universally, as regards House and Street Sewers, would justify the great cost of such a work. I do, however, consider that, in some cases at least, salt-water might be provided for scouring gutters and flushing storm-water drains as well as for flushing the low-level sewers. I will revert to this subject when discussing the Drainage question (Storm-water Drains and Nullahs).
71. I learn with surprise that many gulleys in the public streets, connected with the street-sewers are untrapped. I am unable to say why this omission has been made. The only explanation which I have heard, is that it was considered better to ventilate the street-sewers, through untrapped gulleys at the sides of the street, than by gratings in the manhole-covers in the centre thereof. I can, however, scarcely conceive that this was the reason. Certainly, all gulleys and other inlets to the street-sewers, ought to be trapped. I must however say that I have not noticed many nuisances from the untrapped sewer gulleys. Probably this is due to
No comments yet.
Private notes are available after approval.