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Project Impact Analysis For Flood Control/Drainage Program

The document describes a proposed flood mitigation project along the Bicol River in Libmanan, Camarines Sur. The project would construct a 164-meter concrete dike on steel sheet piles to protect 1,815 people from flooding. Without the dike, 0.22 square kilometers would flood for 3 days every 50 years, damaging 348 homes worth 34.8 million pesos. With the dike, flooding would be reduced to 0.10 square kilometers for just 1 day, saving 615 people and 3.48 million pesos in damages each flood event.

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Eric Cris Ibarra
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430 views3 pages

Project Impact Analysis For Flood Control/Drainage Program

The document describes a proposed flood mitigation project along the Bicol River in Libmanan, Camarines Sur. The project would construct a 164-meter concrete dike on steel sheet piles to protect 1,815 people from flooding. Without the dike, 0.22 square kilometers would flood for 3 days every 50 years, damaging 348 homes worth 34.8 million pesos. With the dike, flooding would be reduced to 0.10 square kilometers for just 1 day, saving 615 people and 3.48 million pesos in damages each flood event.

Uploaded by

Eric Cris Ibarra
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as XLSX, PDF, TXT or read online on Scribd
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PROJECT IMPACT ANALYSIS FOR FLOOD CONTROL/DRAINAGE PROGRAM

Name of Project: OO2: Construction/ Rehabilitation of Flood Mitigation Facilities within Major River Basins and Principal Rivers - Construction of Dike within
Bicol River Basin, Brgy. San Vicente, Libmanan Camarines Sur
Description: Construction of Concrete Dike on Steel Sheet Pile
Goals/Objectives: To mitigate flooding in the areas affected by the River Flow during Typhoon and Heavy Rains and protect the river banks from erosion.

Loaction: Libmanan, Camarines Sur 2nd LD


Project Cost: ₱30,000,000.00

Note: Hydrologic Analysis is based on the available data from Google Map (elevations) and PPA Manuals (Highest Water Level Elevations-Table A page 13. All data are subject
for verification and complete Hydrologic/Hydraulic design will be conducted during Detailed Engineering phase to include Geotechnical, Tidal Analysis, Slope and stability
Analysis and other required Design parameters.

INDICATORS WITHOUT THE PROJECT WITH THE PROJECT RAMARKS


1. Flood Return Period 1 : 50 yr 1 : 50 yr For catchment area more than 40 km²

2. Inundation Area 0.22 km² 0.10 km² see attached figure

3. Inundation Period 3 days 1 day considering the maximum experienced flood level and the site is situated within
the Bicol river basin

4. Affected/Protected Popuplation San Vicente 1,815 pop. San Vicente 1,200 pop. see attached population data based on 2015 Census of Population
(assumed 10% marginal error)

5. Flood damage a. Houses: 348 households @ P100, 000 10% x 34.8 M = 3.48 M (assumed 10% Data based on Libmanan MMDRRMC records
(type & number of structures, per hh = 34.8 Million per occurrence marginal error)
properties or corps, estimated
worth damages if Flood Control
Structure is not built b. Other Structures: may include
commercial and other establishments

c. Crops: includes palay, corn, banana,


coconut, etc.

d. Other agricultural products and


livestock
INDICATORS WITHOUT THE PROJECT WITH THE PROJECT RAMARKS
6. Flood Control Structure/s built or to be
built for the last 10 years

a. River Wall

b. Revetments

c. Dikes 164.00 l.m. Proposed length is based on initial field validation and survey. Actual length
should be determined during preliminary detailed engineering once funding
is approved.

d. Channels

e. Spur Dikes

f. Others

7. If dredging, volume and None None


location of spoil site

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