Although the flooding wasn't caused by heavy rainfall in this instance, it's
an interesting fact that 1 mm of rain is 1 litre of water for every square
metre of land or 10 cubic metres per hectare.
Phil Hall
----- Original Message -----
From: "Terry Simpson" <[EMAIL PROTECTED]>
To: "U.S. Metric Association" <[email protected]>
Sent: Thursday, September 08, 2005 9:06 PM
Subject: [USMA:34366] Maths exercise
Of Nat Hager III
Sent: 08 September 2005 19:56
The media are reporting that at least one pump is pumping out about
27,000 gallons/min of water from New Orleans, which I take to be
a soft conversion of 100,000 liters/min.
Or perhaps 60 cubic feet per second?
http://www.mvd.usace.army.mil/hurricane/chr.php
"Three pumps are now operating at the 17th Street Canal and are
discharging
water at around 2,250 cubic feet per second, or cfs. Pump station 19 at
the
Industrial Canal, just north of Florida Avenue, is currently pumping 1,300
cfs. An additional generator is to arrive today that will allow the Corps
to
activate another pump at this location and remove an additional 1,000 cfs.
Pump station 8, located in St. Bernard Parish in the vicinity of St. Mary,
is running at full capacity at 837 cfs."
I was taught to solve problems in SI units. A pump flow rate would not be
described as:
* 27,000 US gallons per minute
* 60 cubic feet per second
* 5 acre feet per hour
* 100,000 liters per min
* 100 cubic metres per minute
It would be described in SI terms (1.7 cubic metres per second).
