I've been saying since before I moved here that Hong Kong must have some massive drains. It took a visit from Siologen and Snappel to actually get me off my arse and go and look at them.
This is of course sloppy seconds to those two, but I now also have custody of Silos map and will be continuing the good work.
The summer rainfall is nothing short of spectacular, the average for August is 445mm which will have fallen in a total of a few hours. Basically, this meant that the low lying areas of Hong Kong were getting so badly flooded each year that the government decided to spend 3bn dollars to fix the problem.
The answer was a total of about 20km of 8m diameter drains built using tunnel boring machines.
There's far more information here than I'm prepared to copy and paste, along with some cool animations of the construction process - http://www.dsd.gov.hk/others/HKWDT/eng/background.html
There is roughly a kilometre of the bored tunnel above until the first adit.
Unfortunately about here the guy accompanying me dropped his camera into a deeper section of water, meaning that we left in a hurry and didn't stop for any more shots.
This is only 1/20th lot the whole system, so hold tight for parts 2-80..
This is of course sloppy seconds to those two, but I now also have custody of Silos map and will be continuing the good work.
The summer rainfall is nothing short of spectacular, the average for August is 445mm which will have fallen in a total of a few hours. Basically, this meant that the low lying areas of Hong Kong were getting so badly flooded each year that the government decided to spend 3bn dollars to fix the problem.
The answer was a total of about 20km of 8m diameter drains built using tunnel boring machines.
There's far more information here than I'm prepared to copy and paste, along with some cool animations of the construction process - http://www.dsd.gov.hk/others/HKWDT/eng/background.html
There is roughly a kilometre of the bored tunnel above until the first adit.
Unfortunately about here the guy accompanying me dropped his camera into a deeper section of water, meaning that we left in a hurry and didn't stop for any more shots.
This is only 1/20th lot the whole system, so hold tight for parts 2-80..