Rapid Assessment for Resilient Recovery and ... - GFDRR

Figure 13: Water and sanitation
sector – Damage and
losses from flooding 2011
Financial Operating Losses
Total losses in the water and sanitation sector are estimated at THB 2.0 billion. The
majority of these losses are incurred in the urban water supply sub-sector due to lower
revenues and higher expenditures, totaling THB 1.9 billion. Losses in rural water supply
amount to THB 107 million, in urban sanitation to THB 1.4 million.
MWA-run water supply utilities in the Bangkok metropolitan area suffered the majority of
the losses in the water and sanitation sector due to lower revenues from household water
supply fees (approximately THB 1.2 billion) and higher expenditures for water treatment,
customer service, etc. (approximately THB 670 million). Usually the MWA’s Lak Si facility
produces approximately 3.6 million cubic meters of water per day, out of a total supply of
4.8 million cubic meters for the Bangkok metropolitan area (75 percent). The three
remaining facilities produce 25 percent of Bangkok’s water supply. Because of the floods,
the MWA is expecting lower revenues: production has fallen to approximately 3.1 million
cubic meter of water per day (compared to 3.6 million before). This lower production is the
result of reduced filter run time, as filters have to be cleaned every 24 hours, compared to
every 48 hours before the floods, due to more algae in the water. As a result, the pressure
of water is lower and hence households consume less; other households temporarily do
not consume any water at all because residents have evacuated their homes. Costs of
chemicals for water utilities have also increased approximately six times, primarily because
of additional needs to treat raw water.
THAI FLOOD 2011 RAPID ASSESSMENT FOR RESILIENT RECOVERY AND RECONSTRUCTION PLANNING
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