Most Philippine cities have drainage systems of some kind. There are no separate storm water and waste water (sewerage) systems. Wastewater from septic systems freely mixes with the stormwater. In practice this is not as bad as it sounds as the volume of storm water is large and may well flush out the drainage system and its contents into the streams and rivers. The installation and maintenance of drainage systems (along with roads and water systems), is one of the major responsibility of local government

1. –

3.  system of watercourses or drains for
carrying off excess water
 minimises the impact of flooding from
built-up areas into rivers and creeks
 In geomorphology, it is the pattern
formed by the surface water in a
particular drainage basin.

4.  The Philippines ranks third among
countries most at risk for disasters.
 Metro Manila Flood Management Master
Plan (2012) - improve management of
solid waste within villages in the vicinity
of drainage systems

6.  Most cities in the Philippines have no
separate storm water and waste water
system.
 Sometimes the drainage system is more
or less located underground and
sometimes it is open concrete ditches
 Most of the drain pipes were built in the
1960s.

7. • The Construction of Drainage in metro manila
start since 1950’s and under Ministry of Public
Works and Highways now it is called
Department of Public Works and Highways.
• The DPWH Has already installed 35 drainage
mains along the nation roads in manila. It have
a total length of 34 kilometers.

8.  RA 7924 – Operation and Management
was handed over from the DPWH to
MMDA (July 9, 2002)

9. PRINCIPAL
• Drainage mains
• Outfalls
• Creeks
SECONDARY:
• Drainage channels or laterals

11.  According to the Metropolitan Manila
Development Authority (MMDA), 70 percent of
the drain pipes in Manila are made of single
barrels 24 inches in diameter, similar to the
size of the opening of a container drum.
However, the actual and ideal size should be 3
meters by 4 meters or visually similar to the
size of a car

12.  The discharge capacity of the drainage
system was estimated to be reduced to less
than 60% of the original capacity.
 Manila the center of the country and becomes
very dense city which leads to Informal
Settlers to live around creeks, rivers and
esteros.

15. ISSUES CONSIDERED IN THE REHABILITATION:
• Difficulties on Land Acquisition
• Tedious coordination with different and various private and
semi-government agencies handling underground utilities
• Limited area that can be used during project construction
• Difficulties due to heavy traffic and will aggravate traffic jam by
construction

17. • Poorly maintained drainage systems and poor waste
management habits can adversely affect us and our
environment in the following ways;
Flooding: The immediate effects of flooding include loss of
human life, damage to property, destruction of crops and
other plants, loss of livestock.
Illness/diseases: Stagnant water can result to
contamination which can harm living organisms.

18. Flood prone areas are the drainage of:
MANILA NORTH:
• Aviles
• Sampaloc
• España
• Quiapo
MANILA SOUTH:
• Zobel Roxas
• PNR Canal
• Calatagan Creek-1
• San Isidro
• San Antonio
• Pio Del Pilar

19. • Difficulties on Land Acquisition
• Tedious coordination with different and various private and
semi-government
• agencies handling underground utilities
• Limited area that can be used during project construction
(narrow road, etc.)
• Difficulties due to heavy traffic and will aggravate traffic jam
by construction
• Solution is additional pumping station, but limited land for
acquisition.
• Need for additional pumping stations as well as Storage
Facilities

20. • Rehabilitation and Repairs of Drainage pump
• Relocating IFS away from creeks, esteros and
other drainage facilities
• Clean up drive
• Proposals of new drainage systems