I. Water Supply Networks and Facilities Topic I.2. Water Consumption: Norms, Regimes, and Design Flowrates

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I. Water Supply Networks and FacilitiesTopic
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

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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 NormsFor settlements

• Functional type Water supply norms
• of the settlement l/d.cap
• 2000 2010 2020
• 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

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Water Consumption NormsFor fire water supply
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Water Consumption RegimeDefinition Water
consumption variation during a definite period
(day, year).
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Water Consumption Regime

• Variability coefficients
• 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