The volumes of wastewater
m
3
/y
m
3
/d
m 3 /h
m'ls
ad,max
tf/ma
1 .-..ad,av
x-_jtd
Fig 1.8 Calculation of infiltration.
l
Qs,A = 0.02-0.06 l/(s ha)
td r = 200-365
Infiltration r ,y
;d,max
2-3
Qyr
Qd,av,max
/s,mar
0.1-0.2
annual infiltration
av. infiltration per day in periods with infiltration
av. infiltration per day in maximum month of the
year
av. infiltration per hour in periods with infiltration
av. infiltration per hour in maximum month of the
year with infiltration
Qs,A
av. infiltration per second per ha in periods with 1/(s . ha)
infiltration
24
Qs,av
Qs,max
A
ta,yr
av. volume of wastewater per second in periods with
infiltration
av. infiltration per sec. in maximum month of the
year
catchment area
diurnal factor
fd.max
diurnal constant in maximum month
fs,max
seconds constant in maximum month
1/s
ha
d/yr