Henry C. Adams
Capitolo 50
pluvius global during
Time of the Concentration, period of the concentration
A C OF B D E
5 minutes............... 1.75 2.00 3.00 -- --
10 "............... 1.25 1.50 2.00 -- --
15 "............... 1.05 1.25 1.50 -- --
20 "............... 0.95 1.05 1.30 1.20 3.00
25 "............... 0.85 0.95 1.15 -- --
30 "............... 0.80 0.90 1.05 1.00 2.50
35 "............... 0.75 0.85 0.95 -- --
40 "............... 0.70 0.80 0.90 -- --
45 "............... 0.65 0.75 0.85 -- --
1 now.................. 0.50 0.60 0.70 0.75 1.80
1-1/2 ".................. 0.40 0.50 0.60--1.40
2 ".................. 0.30 0.40 0.50 0.50 1.10
The figures in column not A wish is probably exceeded more than
once in every year, that in column B won't probably be
exceeded more than once in three years, while that in column C
you/he/she will be exceeded at all rarely. Columns D and And they assign the
record tabbed from the Meteorological Office the rain,
gives in column D that is described in their publication as
"fallen too much numerous to ask for insertion", and that in column
And as "extreme falls rarely exceeded." However it has to be,
kept in mind
records deduced from all the parts of the country, and even if the
mentioned falls can happen to a lot of cities in some one year it
being many years before the same cities are visited again from
storms of equal magnitude.
While it is being convenient to consider the pluvius quantity for
what provision will be made in terms of the percentage of fall in
thumbs for now it will be useful for the practical one,
question of the figures to know the actual percentage of flow of
the water of storm in the sewers to the point of the concentration in
cubic feet for minute for acrid. These information are given in
the following Table No 8 that they are prepared from the figures
gives in Table No 7, and it is applicable in the same way.
Table No 8.
MASSIMO FLOWS OF STORM WATER.
--------------------------+----------------------------------