ADAMSON UNIVERSITY COLLGE OF ENGINEERING WATER RESOURCES ENGINEERING METRO MANILA FLOODS PRESENTED BY: ALVAREZ, ROBERT RYAN D. DE LAZO, LYKA MAE D. DUNGOG, CHARIZ KATE P. PANGAN, JOANNE BERNADETTE D. REYES PRECIOUS ANGELO N.
PRESENTED TO: DR. TOMAS U. GANIRON JR.
METRO MANILA FLOOD MANAGEMENT The Philippines ranks third among countries most at risk for disasters, including floods, storms, and earthquakes. In the past 30 years, more than 360 disasters struck the Philippines, with a total death toll of 33,000 people which affected 120 million people. Typhoons and floods are the most devastating in terms of their economic and social impact.
80% DEATHS
90%
92%
TOTAL NUMBER OF AFFECTED PEOPLE
TOTAL ECONOMIC IMPACT
Flood is "an abnormal progressive rise in the water level of a stream that may result in the overflowing by the water of the normal confines of the stream with the subsequent inundation of areas which are not normally submerged".
NATURAL CAUSES Meteorological Events - an intense and prolonged rainfall spells - unusually high coastal and estuarine waters due to storm surges, seiches, etc
Seismic Activities - tsunamis (seismic sea waves) - sinking of land due to earthquakes reduces the elevation of land areas - uplifting of lake and river beds from seismic causes sometime results in the overflowing of these bodies of water
Astronomically-Influenced Phenomena - high tides coinciding with the occurrence of heavy rainfall
ARTIFICIAL CAUSES Blasting - causes landslides in the slopes of hills and mountains which may result in the unintentional damming of rivers and streams
Construction of temporary dams - produces an impediment to the flow of a river or stream which then results in an overflow
Failure of hydraulic and other control structures - accidents like the breaking of a dike result in the entry of an enormous quantity of water in a protected area
Mismanagement of hydraulic structures - may necessitate an untimely and sudden release of large amounts of excess water
Denudation of forest and watershed areas -
alter the ecological system in a river basin will have an impact on the hydrology of the catchment
EFFECTS OF FLOODING • 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 • incalculable loss of human lives • forced human displacement • emotional impact on those affected by floods • lack of basic utilities and essential necessities • contamination of the water supply • epidemic of gastro-intestinal diseases and respiratory ailments frequently breaks out
FLOOD FORECASTING OPERATION
MONITORING
ANALYSIS
PREPARATION OF FORECAST AND WARNING
DISSEMINATION OF THE FLOOD FORECAST AND WARNING
HOW DOES THE GOVERNMENT CONTROL FLOODS?
$500 Million Metro Manila Flood Control Man agement Project 1. ) The master plan proposed a set of measures to effectively manage major flood events in the future which include the following: • reduce flooding from river systems that run through the metropolis, by building a dam in the upper Marikina River catchment area to reduce peak river flows entering Metro Manila during typhoons and other extreme rainfall events; • eliminate long-term flooding in the flood plain of Laguna de Bay to protect the population living along the shore against high water levels; • improve urban drainage, including modernization of Metro Manila’s pumping stations; • improve flood forecasting and early warning systems and community-based flood risk management; and • improve institutional arrangements for better flood management.
$500 Million Metro Manila Flood Control Man agement Project 2.) 36 existing pumping stations will be modernized, 20 new ones will be constructed, and supporting infrastructure along critical waterways will be improved in the cities of Manila, Pasay, Taguig, Makati, Malabon, Mandaluyong, San Juan, Pasig, Valenzuela, Quezon City, and Caloocan.
$500 Million Metro Manila Flood Control Man agement Project 3.) The project will improve management of solid waste within villages in the vicinity of drainage systems served by the pumping stations. It will also support government’s resettlement of informal settlers that have encroached on the waterways.
$500 Million Metro Manila Flood Control Man agement Project 4.) The Department of Public Works and Highways (DPWH) and the Metro Manila Development Authority (MMDA) will implement the project in close coordination with local governments and key shelter agencies. Slated to start in 2017, the project is scheduled to be completed in 2024.
$500 Million Metro Manila Flood Control Man agement Project 5.) In 2015, the World Bank obtained a US$6-million grant from the Australia-World Bank Philippines Development Trust Fund and Policy and Human Resources Development Trust Fund of Japan to finance studies and designs of other interventions for the next phase of the master plan implementation.
PUMPING STATIONS
STORMWATER PUMPING STATIONS IN MANIL A 1. Abucay Pumping Station 2. Balut Pumping Station 3. Makati Pumping Station 4. Aviles Pumping Station 5. Binondo Pumping Station 6. Pandacan Pumping Station 7. Valencia Pumping Station 8. Sta. Clara Pumping Station 9. Libertad Pumping Station 10.Quiapo Pumping Station 11.Paco Pumping Station
PURPOSE AND CHALLENGES OF PUMPING S TATIONS PURPOSE Stormwater pump stations help protect areas by pumping away large volumes of water, thereby preventing the occurrence of flooding.
CHALLENGES • Stormwater often contains solids and large amounts of fibrous material • Large inflows occur within a short period of time • Operates for shorter periods over the year but when needed demands high operational reliability • Good trash racks are a must
INSIDE THE PUMPING STATION
BINONDO PUMPING STATION
MAINTENANCE OF PUMPING STATIONS Major maintenance works at pumping stations and booster pump stations include: • daily and periodic inspection of electric and pumping equipment to check for abnormalities • record inspection data. • periodic switching of equipment in operation as well as systematic switching • simple repairs at the time of construction or electric equipment inspection