1. Degradation of Water Sources
Guillermo Q Tabios III
Associate Professor of Civil Engineering and
Research Fellow of National Hydraulic Research Center
University of the Philippines, Diliman, Quezon City
7th National Educators’ Assembly in
Environmental Protection and Management
Cagayan de Oro City, October 10-11, 2002

4. Herbicide Application
Urban
Runoff
Abandoned
Mine
Tailings
Herbicide Application
Industrial
Lagoons
Erosion
Municipal
Treatment
Plant
Agricultural
Runoff
Impermeable Bedrock
Sanitary
Landfill
Salt
Water
Municipal
Well
Irrigation
Private
Hazardous waste
Lake
Sea Water
Intrusion
Unconfined Aquifer
Fresh
Water
Confined Aquifer

29. Payatas Open
Dumpsite
Novaliches Reservoir
(La Mesa Damsite)

34. freshwater over freshwater-saline water interface
land surface
groundwater table
sea
freshwater
seabed
freshwater-saline water interface
saline water
freshwater over freshwater-saline
water interface

35. freshwater-saline water interface
land surface
groundwater table way below
due to overpumping
sea
freshwater-saline water interface
(way inland)
seabed
freshwater
saline water
freshwater-saline water interface
way inland due to groundwater overpumping