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What are the effects of flooding in Manila?
A really big flood can result in millions even billions of pesos of damages to roads and bridges, buildings and other economic infrastructure, in the loss of agricultural crops and livestocks, loss of productivity in industry, commerce and trade.
Why is Metro Manila prone to flood?
Inadequate drainage capacity - As mentioned, poorly built and planned drainage systems cause flooding. For instance, flood-prone areas in Manila are mainly due to insufficient drainage at the corner of Quirino Avenue and Pedro Gil, Dapitan Street/Basilio to Casanas Street, and others.[more info][more info][more info]
Immediate impacts of flooding can include loss of human life, damage to property and infrastructure, and destruction of crops and livestock. A clogged drain can cause water leaks, slow water draining, collapsed drains and even burst pipes. Burst pipes can flood your home in a matter of minutes.
     
Tthe current conventional design of the city stormwater (street drainage) line flows directly into the rivers in the event of high-volume rain the rivers tend to overflow and cannot cope with the simultaneous flow of stormwater from various communities resulting in clogging/backflow and flooding.
   
The city-wide area has a huge interconnected aquifer groundwater reservoir that can accommodate/absorb millions of tons of water, where every city stormwater can be simultaneously (downflow) injected using specially designed (Ground Well Injection) equipment with a capacity of +1000 LPM flow rate.
RESULT
The energize/recharge Aquafier Groundwater reservoir can be used as (up-flow water suction) deep well water source for irrigation and domestic water source an alternated for water dam. The key benefit of recharging the groundwater aquifer:

1 The river maintains a safe water level even during heavy storm rain
2 The city drainage (stormwater) can normally absorb large water volume flow without flooding
3 Alternative water sources especially during draught season.
4 support environmental natural water cycle process 5 prevent sinkholes and soil erosion.