Solana

Enrile

Tuguegarao

Riverbank Erosion around Enrile and �Tuguegarao

N



Figure 1.2.2

Legend

Topographic map (1947 - 1953)

Aerial photographs (1979)

Topographic map (1990)

Aerial photographs (2000)

Road

0 1 2 3 kmScale

VI-F31

0

50

100

150

200

250

300

350

1975

1980

1985

1990

1995

2000

2005

2010Yea

r

0

2

4

6

8

10

12

14

Projected Dead Space : 300 million cu.m

Annual SedimentRate

Accumulated SedimentVolume

Earthquake occurred in 1990

Completion of Dam

(Projected Annual Sediment Rate : 5.5 million cu.m)

Source : NIA,Region II Office

VI-F32

Babuyan Channel

Dummon R.

Caga

yan

R.

Pared R.

Chico R

. Tuguegarao R. SIER

RA

MA

DR

E M

OU

NTA

INS

SIER

RA

MA

DR

E M

OU

NTA

INS

Pinacanauan R.

Tumauini R.

Caga

yan

R.

Magat R.

Ilaga

n R.

Siffu R.

Mallig

R.

CORD

ILLE

RA M

OUNT

AINS

Addalam R.

Mag

at R.

Caga

yan

R.

Cag

ayan

R.

0 10 20 30 40 50 kmScale

Inundation Area Map (Nov.1973 Flood)

N

River CourseRoadBasin Boundary

Inundation Area(Nov.1973 Flood)

Subbasin of MajorTributary

LEGEND

Source: FINAL REPORT FOR THE MASTER PLAN STUDYON THE CAGAYAN RIVER BASIN WATER RESOURCESDEVELOPMENT / SUPPORTING REPORT/ AUGUST 1987



Figure 1.2.4

VI-F33

Babuyan Channel

Dummon R.

Caga

yan

R.

Pared R.

Chico R


RA

MA

DR

E M

OU

NTA

INS

SIER

RA

MA

DR

E M

OU

NTA

INS

Pinacanauan R.

Tumauini R.

Caga

yan

R.

Magat R.

Ilaga

n R.

Siffu R.

Mallig

R.

CORD

ILLE

RA M

OUNT

AINS

Addalam R.

Mag

at R.

Caga

yan

R.

Cag

ayan

R.

0 10 20 30 40 50 kmScale

Inundation Area Map (Nov.1980 Flood)

N


Inundation Area(Nov.1980 Flood)


LEGEND

Source: FINAL REPORT FOR THE MASTER PLAN STUDYON THE CAGAYAN RIVER BASIN WATER RESOURCESDEVELOPMENT / SUPPORTING REPORT/ AUGUST 1987



Figure 1.2.5

VI-F34

Babuyan Channel

Dummon R.

Caga

yan

R.

Pared R.

Chico R


RA

MA

DR

E M

OU

NTA

INS

SIER

RA

MA

DR

E M

OU

NTA

INS

Pinacanauan R.

Tumauini R.

Caga

yan

R.

Magat R.

Ilaga

n R.

Siffu R.

Mallig

R.

CORD

ILLE

RA M

OUNT

AINS

Addalam R.

Mag

at R.

Caga

yan

R.

Cag

ayan

R.

0 10 20 30 40 50 kmScale

Inundation Area Map (Oct.1998 Flood)

N


Inundation Area(Oct.1998 Flood)


LEGEND

Source: OCD Region II Office and Interview Survey by the Study Team



Figure 1.2.6

VI-F35


in the Republic of the Philippines

Figure 1.4.1

JAPAN INTERNATIONAL COOPERATION AGENCYCommunication Flow Chart OfNational Disaster Management

PresidentNational Disaster Coordinating Council

Office of Civil Defense

Reginal DisasterCoordinating Council

Barangay DisasterCoordinating Council

City Disaster CoordinatingCouncil

Barangay DisasterCoordinating Council

Municipality DisasterCoordinating Council

Legend: Information for Decision: Decision and ActionData source : Region 2, RDCC

Provincial DisasterCoordinating Council

Inhabitant Inhabitant

PAGASA

VI-F36

Regional Director/Police Chief SuperintendentRegional Disaster Coordinating Council

RDCC OPLAN BAGYO/LAYOSsupported by

PRO2 LOI LA NINA and LOIKALIGTASAN

Provincial Disaster Coordinating CouncilsCity/Municipality Disaster Coordinating Councils

Barangay Disaster Coordinating Councils

Disaster Affected Areass

Committees

Source: Integrated Regional Disaster Management, RDCC Region 2

Note: The symbol "*" indicates the lead agency.

Communication and WarningServices

( *PIA, PNP, BUTEL, NTC, PAGASA, Radio Stations, OCD, REACT, Pugad Lawin, PLDT, CSC )

Health and Medical Services

(*DOH, PNP & PNRC, DILG)

Transportation Services

( *LTO, PNP, DPWH, ATO, PPC, CASF 2, 5ID PA, LTFRB )

Welfare and RehabilitationServices

( *DPWH, DSWD, DOH, NFA, DA, DECS, NTC, TELOF, PCIC, PNP, NGOs )

Price Stabilization Services

( *DTI, PNP, BIR, NAPOLCOM, DA, DOH, NGOs, LGUs )

Relief Services

( *DSWD, DOH, NFA, DAR, DA, PNRC, PNP, NGOs)

Rescue and Recovery Services

(*PNP, DOH, PNRC, DA, DPWH, LTO, 5ID PA, BFP, PPC, CASF 2, NGOs)

Training Services

( *OCD, DILG, DSWD, PNRC, PNP, DOH, DA, DPWH, PAGASA, BFP, DOLE, TESDA, DOST )

VI-F37

Tumauini

Pared

ChicoRive

ParetRiverPinacanau

an

River

Pa

ng

olBrookRiver

CagayanRive

r

IlaganRive

r

Ca

gayanRiver

r

Casigna

n

River

Ma

ga

tRiver

Magat Reservoir

Figure 1.4.3

VI-F38

RESERVOIR

MAGAT HIGHDAMMAGAT DAM

MAGAT HIGHDAMMARIS DAM

TO SAN

TIAGO

CITY

TO MANILA

TO R

OXA

S

TO ROXAS

TO T

UG

UEG

ARAO

BURGOS

SAN MANUEL

AURORA

CABATUAN

LUNA

CAUAYAN

SAN MATEO

RAMON

REINA MERCEDES

NAGUILAN

GAMU

1 2

3

4

5

6 78

9

1011

12

13 14

15

16

17

18

19

20

21 2223

2425

26

27

28

29

30

31

32

3334

35

3736

38

39

40

4142

43

44

45

464748

49

50

51

5253

54 55

5657

5859

60 61 62 63 6465

66

67

6869

70

71 72

12573

74

75

76 7778

7980

81

82

83

84

85

8687

8889

909192

93

94

95

96

9798

99

100

101

102

103

104105

106107

108

109110

111

117

112113

114

116

118119

115

124

120121

122

123

1 STO. DOMINGO2 NAMILLANGAN3 NIA-MRIIS-DRD4 KINAWAYAYAN5 OSCARIZ6 BURGOS7 VILLA BELTRAN8 VILLA FUERTE9 SINAMAR NORTE10ESTRELLA11BELLA LUZ12DAGUPAN13VILLA MAGAT14SAN MANUEL15VICTORIA

31CULING CENTRO32CULING WEST33RANISIEN34VILLA FUGO35VILLA VIERNES36BANNAOAG37KAIPILAN38SAN ANDRES39MARANGUE40MALALINTA41BAGONG TANZA42SAN PEDRO43STA. ROSA44SN. JOSE45SN. JUAN

61PULAY62LALOG63SANTOR64DANGAN BABA65SINIPPIL66DANGAN VIEJO67NAPACCU GRANDE68MAPACCU PEQUENO69TAGARAN70MABANTAD71TURAYONG72NAGCAMPEGAN73LIBENAB PEQUENO74LIBENAB GRANDE75VILLADOR

91BANQUERO92SANTIAGO93SAN BONIFACIO94SAN ROQUE95HACIENDA VIOLA96DALIG VIEJO97MALASIN98BUGNAY99CALIGUIAN100MABINI101PINTOR102UNION103BIGAO104NAMPICUAN105BAGNOS

121BINARSANG122CATABBAN123SALUCONG124SAN LUIS125MINALLO

16SALINUNGAN17KAKAWAYANAN18SAN JOSE19BAGONG SIKAT20SAN ROQUE21MAPUROK22SANIGNACIO23OLD CENTRO II24OLD CENTRO I25MARASAT GRANDE26MARASAT PEQUENO27TANDUL28MAC. DAM29DIAMANTINA30LAPAZ

46SILI47CAMARUNG48SARANAY49CULING EAST50MACALAOT51NAGRAMBUAN52MARABULIG 253CAUAYAN AIRPORT54MAMBABANGA55DADAP56MACANAO57SAN MIGUEL58PUROK59LUZON60CONCEPCION

76TUROD77MANSIBANG78PALAT TAO79MALALATANG GRANDE80TONGUE81GUIBANG82UPI83PILAR84CABANNUANGAN85BALLUDI86BARCOLAN87BUENAVISTA88STA. ROSA89LINSON90FURAO

106LAPUZ107STA. RITA108MALASIN109BOLINAO110SOBASTA111VICTORIA112ESPERANZA WEST113ESPERANZA EAST114DALIG115KALINGA116MACOCAY117BANNAGAO118MAGAT119SAN ISIDRO120STO. DOMINGO

N

ZONE 1 = 1000 CMSZONE 2 = 2000 CMSZONE 3 = 3000 CMSZONE 4 = 5000 CMSZONE 5 = 8000 CMS & ABOVE

- RIVER

- NATIONAL ROAD

- PROTECTION DYKE

- FLOODED RESIDENTIAL AREAS

- LOCATION OF FLOOD WARNING SIRENS (OLD)

- LOCATION OF FLOOD WARNING STATION (NEW)

0 1000 2000 3000 4000 5000m

Figure 1.4.4M

agat Flood Warning System

and�Flood Z

ones Dow

nstream of M

agat Dam

Outline

ofMagapitB

ridge

TheFeasibility

Studyofthe

FloodC

ontrolProjectforthe

LowerC

agayanRiver

inthe

Republicofthe

PhilippinesJA

PAN

INTER

NATIO

NA

LC

OO

PERATIO

NA

GEN

CY

Figure1.5.1

VI-F40

M ajor Cause and C onstraint

Structural M easures

Non-Structural M easures

Supporting M easures

C o unterm easure s to achie ve; 1. Prote ctio n of C asualty and Assets 2. Increase of A gricultural Products

Natural Cause (1) (River Channe l )1. Ex t ensive f lood p lain2 . B ack water due to con strict ed sect ion s in the Magapit narroe s 3 . Se dimentation 4 . B ank erosion due to so f t riverb ank

Fl ood Control Problem 1 . Damage o f casualty an d asset s 2. Low agricult ural p r oduc t

Natural Cause (2)1. Co nce nt rat ed rainfall br o ught by t y pho on 2 . Poo r v egetation

Soci al an d Economi c Cons traint1. Shortage of budge t2. Lack of overall plan and implementat ion schedule3. Lac k of integrated organization and c apabilit y

Widening of Bottl e ne cks1. Lo wer in g o f floo d wate r lev el2. Decre ase o f in undat ion depth an d d urat io n in t he upst ream

Embankm ent1 . Decrease o f inun dation are a a nd cr eation o f n ew land 2. Co nt ribut e as rur al road

Bank Protection Works 1 . Stabilize low wate r ch ann el

Strengthening of Institution and @ @ Or ganization

1 . Str en gthen in g of f unding 2 . Insti t utiona l im prov emen t 3. Or ganizat ion al improv emen t 4 . C apa cit y b uilding 5. Awaren ess education

Non-structural Me asures

1. Wa ter sh ed managemen t 2. Disaster managemen t system 3. Reset tlemen t

H ig h V ulnerability a gainst D isaster

1 .C as ualty2 .Los s of a sse ts3 .Low prod uctivity

Mul ti purpose Dam 1. Decrease o f floo d p eak 2. Supp ly water for irr igation d ev't

VI-F41

Flood Dike (Embankment) and Riverbank Forest Zone

Design High Water Level

Dike DimensionsDesign Discharge Free Board Top Width

(cu.m/s) (m) (m)

5,000 to 10,000 1.5 6

more than 10,000 2 7

Riverbank Forest Zoneto form natural levee ( andprotect earth dike)(by Bamboo, Tree, etc.)

Top Width

FreeBoard

Boundary of Administrative River Zone

Note;

Purpose of Riverbank Forest Zone;

1. To reduce velocity2. To form natural levee by siltation3. To protect dike from scouring due to flood flows

Dike

Low Water Channel

Drain

Siltation afterpassing through theriverbank forest zone(year by year)

Dike constructionfinally by additionalembankment

VI-F42

Source : The Master Plan Study on the Cagayan River Basin Water Resouce Development, Supporting Report Aug. 1987 by JICA (page;FC-131)

17,900(15,900)[25,400]

16,900(17,800)[24,600]

17,700(18,700)[25,600]

5,900(7,700)[9,100]

15,600(16,300)[23,100]

10,000(10,700)[15,100]

Siffu No.1(A) Dam Vol : 96.1 mcm Rout 0.10

Mallig No.2 Dam Vol : 93.4 mcm Rout 0.10

Magat Dam Vol : 200 mcm Rout 0.638

Cagayan No.1 Dam Vol : 318 mcm Rout 0.683

Ilagan No.1 Dam Vol : 382 mcm Rout 0.10

900(1,400)[1,100]

900(6,100)[1,200]

4,800(6,900)[7,000]

Cagayan River

Ilagan River

Cagayan River

Mallig R.

LEGEND Flood Discharge (m3/s)

10,000(10,700)[15,100]

: Long-term Plan (25yr): Existing (25yr): Framework Plan (100yr)

VI-F43

Alc

ala

Pare

d R.

(R)

Nas

sipin

gCh

ico

R.(L

)

Dum

mon

R.(R

)

Zinu

ndun

gan

R.(L

)

Mag

apit

Br.

6

8

10

12

14

16

18

20

22

24

26

20 30 40 50 60 70 80 90 100

Distance from River Mouth (km)

Elev

atio

n (E

l m)

0

1000

2000

3000

4000

5000

6000

7000

8000

9000

10000

Wid

th (

m)

W=1/10 0

Width of FloodPl i

W idth of Low Wat er

Under the present river channel

W=1/2 5

Magapit Site

Nassiping Site

Tupang Site

1.4m

2.1m

2.6m

0.4m

1.2m

2.0m

VI-F44

Maagapita

Nassipin

Alcala

Chico River

← Cagayan River

Case-4 Tupang + Nassiping + Magapit Site (W=500m)

Case-5 Tupang ~ Magapit Site (W=700m)

Case-3 Tupang + Nassiping Site (W=500m)

Case-2 Tupang Site (W=500m)

( Case-1 Without widening )

Tupang Sitep g

Nassiping Sitep g

Magapit Siteg p

m30

km30

km3

5km3535335

m

The F

easib

ility Stu

dy o

f the F

loo

d C

ontro

l Pro

jectfo

r the L

ow

er Cagaya

n R

iverin

the R

epublic o

f the P

hilip

pin

es

JAPA

N IN

TE

RN

AT

ION

AL

CO

OP

ER

AT

ION

AG

EN

CY

Fig

ure 2

.2.2L

oca

tion

Map

of B

ottlen

ecks

in th

e Magap

it Narro

ws

0 1 2 kW=500m

W=700m

Chan

nel

VI-F45

-30

-25

-20

-15

-10

-5

0

5

10

15

20

25

30

35

40

0000

0

0050

0

0100

0

0150

0

0200

0

0250

0

0300

0

0350

0

0400

0

0450

0

0500

0

0550

0

0600

0

0650

0

0800

0

0850

0

1000

0

1050

0

1100

0

1150

0

1300

0

1350

0

1400

0

1450

0

1500

0

1550

0

Section Number

Ele

vati

on (E

L m

)

Gabut COC

San Isidro COC

Tuguegarao COC

The Feasibility Study of the Flood Control Project

for the Lower C

agayan Riverin the Republic of the Philippines

JAPA

N IN

TERN

ATION

AL C

OO

PERATIO

N A

GEN

CY

Figure 2.2.3Proposed Longitudinal Profile

of the Low

er Cagayan R

iver

CabaganSta. Maria Br.

Pinacanauan R.(R)

Tuguegarao R.(R)Buntun Br.

AlcalaPared R.(R)

NassipingChico R.(L)

Dummon R.(R)Zinundungan R.(L)

Magapit Br.

Aparri

Top of Dike

H.W.L

25-year Flood Water Level

Left Bank Elevation

Right Bank Elevation

Mean River Bed

Deepest River Bed

Design River Bed

The F

easib

ility Stu

dy o

f the F

lood C

ontro

l Pro

jectfo

r the L

ow

er Cagaya

n R

iverin

the R

epublic o

f the P

hilip

pin

es

JAPA

N IN

TE

RN

AT

ION

AL

CO

OP

ER

AT

ION

AG

EN

CY

Fig

ure 2

.2.4L

oca

tion

Map

of A

lternativ

e Pla

n

Alca

la to

Bu

ntu

n B

ridge

0 1 2 km

Alcala-Buntun dike

Gabut cut-off channel

San Isidro cut-off channel

Raising of National Highway



Amulung dike

Solana dike



Amulung dike

Solana dike


West Amulung dike

Solana dike

Case-1

Case-2

Case-3

Case-4

VI-F47

Tuguegarao dike

Tuguegarao

diversion channel

Enrile dike

Tuguegarao dike

Enrile dike

Tuguegarao dike

Tuguegarao cut-off channel

Case-1

Case-2

Case-3

0 1 2 km


in the Republic of the Philippines

JAPAN INTERNATIONAL COOPERATION AGENCY

Figure 2.2.5

Location Map of Alternative Plan

Buntun Br. to Upstream of Tuguegarao

VI-F48

Magat (Existing)

Babuyan Channel

Dummon River

Pared River

Chi

co R

iver

Tuguegarao River

SIER

RA

MA

DR

E M

OU

NTA

INS

SIER

RA

MA

DR

E M

OU

NTA

INS

PinacanauanRiver

Tumauini River

Caga

yan

Rive

r

Ilaga

n R.

Siffu River

Mallig River

CORD

ILLE

RA M

OUNT

AINS

Adda

lam R

iver

Caga

yan

Rive

r

Cagay

an R

iver

Magat River

Gabut COC

San Isidro COC

Tuguegarao COC

Alcala-Buntun Dike

Enrile Dike

Tuguegarao Dike

Lower Reach Dike

Siffu No.1 (A)

:Proposed schemes in the Reviewed Long-term Plan including bank protection works at 73 sites in the basin wide, and non-structural measures (evacuation system and resettlement area development).

Mallig No.2

Alimit No.1 (A)

Matuno No.1

Magat DikeUpper Reach Dike

Middle Reach Dike

Aparri

Alcala

Tuguegarao

Ilagan

Cabagan

0 10 20 30 40 50 kmScale

Outline of Reviewed Flood Control Long-term Plan

N



Figure 2.3.1

River Course

Diking systemBasin Boundary

LEGEND

Hilly land

Dam reservoir

VI-F49

Cut-off Channel

100m

6m

500m

1:3 1:3

1:3 1:3

100m

7m

1:3HWL 1:3

Dike construction

(finally by additional

embankment)

passing through the

riverbank forest zone

(year by year)

Drain

Riverbank Forest Zone

to form natural levee (and

protect earth dike)

(by Bamboo, Tree, etc.)

Flood Dike (Embankment) with Riverbank Forest Zone

Tuguegarao dike

L=14.3km

Alcala-Buntun dike

L=38 6kmGabut cut-off channel

Drainage culvert for tributary

6 gates x 1.5m x 1.5m

Tuguegarao cut-off channelEnrile dike

L=4.6km

San Isid

of National H

The F

easib

ility Stu

dy o

f the F

lood C

ontro

l Pro

jectfo

r the L

ow

er Cagaya

n R

iverin

the R

epublic o

f the P

hilip

pin

es

JAPA

N IN

TE

RN

AT

ION

AL

CO

OP

ER

AT

ION

AG

EN

CY

Fig

ure 2

.3.2

Loca

tion

Map

of R

eview

ed F

lood

Con

trol

Lon

g-term

Pla

n (fro

m A

lcala

to T

ugu

egara

o)

0 1 2 km

Bab

uyan

Chan

nel

Dum

Chico R.N

Ap

arr

i

VI-F50

Aparri

Lal-lo

Magapit Br.Magapit

Gattaran

Nassiping

Tuao

Alcala

Iguig

Amulung

SolanaBuntun Br.

Enrile

Cabagan

Tumauini

Cauayan

Ilagan

Magat Dam

Mallig

Tuguegarao

Echague

Santiago

Pangal Norte

Jones

Babuyan Channel

Dummon R.

Caga

yan

R.

Pared R.

Chico R

.

Tuguegarao R.

Sier

ra M

adre

Mou

ntai

ns

Sier

ra M

adre

Mou

ntai

ns

Pinacanauan R.

Tumauini R.

Caga

yan

R.

Magat R.

Ilaga

n R.

Siffu R.

Mallig

R.

Cord

iller

a M

ount

ains

Mag

at R.

Caga

yan

R.

1011

12

15

13 23

22

26

2524

14

16

19

3231

20

21

35

34

37 49

33

36

2928 27

30

18

17

1

3

45

6

78

9

2

50 73

0 10 20 30 kmScale

Location of Bank Protection Works in the Reviewed Flood Control Long-term Plan

N



Figure 2.3.3

Bank erosion

River CourseRoadBasin BoundarySubbasin of MajorTributary

LEGEND

VI-F51

N

10 0 10 20 30 40 50km

SCALE

Legend

Flood Prone AreaRiver Bank ErosionSoil Erosion

Figure 2.4.1

VI-F52

figure 1.2.1 critical bank erosion sites

Documents