Ground level subsidence due to over extraction of ground water
ÿ Rapid increase in population, particularly the informal housing sector, which finds
refuge along the river banks, canals, esteros, and waterways This blocks access
of maintenance personnel and equipment, accelerates accretion in waterways
which reduces the conveyance capacity.
ÿ Disposal of solid wastes to waterways, estimated at 25% of the total solid waste
generation of 8,000 tons per day in the Region which clog drainage canals,
poses health risk, and increase the likelihood of flooding