Transcript 1Water Supply2

I. Water Supply Networks and Facilities
Topic I.2. Water Consumption: Norms, Regimes,
and Design Flowrates
Kinds of water consumption:
 Potable water consumption
 Industrial water consumption
 Fire water consumption
Basic factors, influencing water consumption:
 Kind and scale of the consumer
 Level of urbanisation and of the sanitary equipment of the
buildings
 Water prise and the way of water consumption measurement and
payment
 Climate and cultural level of the population
 Water supply system management and current state of the assets 1
Water Consumption Norms
Definition: Water volume used by one consumer (human, animal, bird) or
needed for unit industrial production per definite period (day, hour, work
period).
General classification:
I. According to the level of integration
 Lump (integrated, general) norms
 Specific (differential) norms
II. According to the consumer
 Norms for potable water for population
 Norms for washing the streets
 Norms for drinking water for workers at the industry
 Norms for a client or visitor (at the restaurants, hotels - for settlements,
mountain an see resorts) or a patient (at the hospitals)
 Norms for fire water supply
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Water Consumption Norms
For settlements
Functional type
of the settlement
Water
norms
2000
supply
[ l/d.cap]
2010
Capital
280
300
310
I
260
270
280
II
245
260
270
III
215
220
230
IV
190
200
210
V
130
160
170
VI
130
150
155
VII
130
135
140
2020
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Water Consumption Norms
For fire water supply
Functional type of
the setlement
Number of
simultaneous fires
water flowrate
for one fire
[l/s]
Total water
flowrate
[l/s]
V - VIII
1
5
5
IV
1
10
10
III
2
10
20
II
2
20
40
I
3
30
90
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Water Consumption Regime
Definition: Water consumption variation during a definite period
(day, year).
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Water Consumption Regime
d
VariabilityKcoefficients:
 Coefficient of daily variability - Kd
Kd = Qmax,d/Qav,d
 Coefficient of hourly variability - Kh
Kh = Qmax,h/Qav,h ;
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Design Water Flowrates
 Average (mean) daily flowrate - Qav,d
Qav,d = N.q/1000, [m3/d]
N - number of population
q - water supply norm, [l/d.cap]
 Maximum daily flowrate - Qmax,d
Qmax,d = Kd .Qav,d
Kd = 1 + 1,35/N0,12
 Maximum hourly flowrate - Qmax,h
Qmax,h = Kh .Qav,h = Kd. Kh .Qav,h /24
Qav,h = Qmax,d/24, [m3/h]
Qav,h = Kd.Qav,d/24, [m3/h]
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