Report on monitoring in the flood season in Cambodia in 2006 en 2007

(1)

Title Deliverable:

Report on monitoring in the flood season in Cambodia in 2006 en 2007

DC-Project code:

DC Project Title:

WAOP

CT05.10

DC-Work package code

DC Work Package Title:

Mekong case

CT05.14.11

Principal Author 1:

Department of Hydrology and River

Works

Institute:

Principal Author 2:

Ministry of Water Resources and

Meteorology

Institute:

Contributor 1:

Institute

Contributor 2:

Institute

Report Type:

Final report

Report Status:

Definitief

Number of pages:

134 Number of

Annexes:

Keywords (3-8):

Mekong programme, roads and floods, environmentally friendly guidelines, floodplains

Abstract:

The FMMP is cooperating with WWF Living Mekong Programme, and three Delft

Cluster institutes (UNESCO-IHE, Delft Hydraulics and Geodelft) to implement a 2 year

'Roads and Floods' project. The project aims at developing economically sound and

environmentally friendly guidelines for the planning and design of roads in the Mekong

floodplains of Cambodia and Vietnam. The project is an integral part of the FMMP

Component 2 and contributes to Output 1.3 ('guidelines for effectiveness, use and impact

assessment of structural interventions').

In order to achieve the objectives of the 'Roads and Floods' project, various field

survey/monitoring activities will be executed and additional data will be collected.

Generally, the activities will contribute to:

. Development of a detailed 1020 inundation model for the study area.

. Assessments of damage to infrastructure (roads and permeability structures) due to

flooding events. The type of damage and the underlying failure mechanisms will

be determined from survey data and possibly historical data.

Institute Publication-number (optional):

Isbn:

Issn:

DC-Publication-number (invullen door DC):

CT05.14.R02

(2)

KINGDOM OF CAMBODIA

Nation Religion King

REPORT

on

MONITORING

IN THE FLOOD SEASON

IN CAMBODIA IN 2006 AND 2007

(3)

Page

1 Introduction

1

2 Pilot

sites

to

be

Survey

and

Studied

1

3 Field

Survey

Monitoring

2

4 Flood

Survey

Requirement

7 A-

Hydraulic

Survey

Requirement

7 Scopes of Works for Flood Marks

Installation 10

Installation Process

10 Scopes of Works for Flow Measurement Survey

12 B-1: Road damage data at Site C1 during flood survery

17 B-2: Road damage data at Site C1 in post flood survey

24 C-1: Road Damage Data at Site C2 during flood survery

27 C-2: Road Damage Data at Site C2 in post flood survery

32

5 Conclusion

35 Annex A-Monitoring Location in Cambodia in Pilot Site C1

3 Annex B- Monitoring Location in Cambodia in Pilot Site C2

6 LIST OF TABLE

Table 1 : ADP Discharge measurement at C1-H1

T-1

Table 2 : ADP Discharge measurement at C1-H2

T-2

Table 3 : ADP Discharge measurement at C1-H3

T-3

Table 4 : ADP Discharge measurement at C1-H4

T-4

Table 5 : Discharge measurement by Current Meter at C1-H5

T-5

Table 6 : ADP Discharge measurement at C1-H6

T-6

Table 7 : ADP Discharge measurement at C1-H10

T-7

Table 8 : ADP Discharge measurement at C2-H1

T-8

Table 9 : ADP Discharge measurement at C2-H2

T-9

Table 10 : ADCP Discharge measurement at C2-H3

T-10

Table 11 : Discharge measurement by Current Meter at C2-H5

T-11

Table 12 : ADCP Discharge measurement at C1-H6

T-11

Table 13 : Discharge measurement by Current Meter at C2-H7 (1/2)

T-12

Table 14 : ADCP Discharge measurement at C1-H4

T-13

Table 15 : ADP Discharge measurement at C1-H1

T-14

(4)

Table 18 : ADCP Discharge measurement at C1-H4

T-17

Table 19 : Discharge measurement by Current Meter at C1-H5

T-18

Table 20 : ADCP Discharge measurement at C1-H6

T-19

Table 21 : ADCP Discharge measurement at C1-H10

T-20

Table 22 : ADP Discharge measurement at C2-H1

T-21

Table 23 : ADP Discharge measurement at C2-H2

T-22

Table 24 : ADCP Discharge measurement at C2-H3

T-23

Table 25 : Discharge measurement by Current Meter at C2-H5

T-24

Table 26 : ADCP Discharge measurement at C2-H6

T-25

Table 27 : Discharge measurement by Current Meter at C2-H7

T-25

Table 28 : ADP Discharge measurement at C2-H8

T-26

Table

H-1

:

Gauge

Height

at

C1-H1

(1/3)

H-1

Table

H-1

:

Gauge

Height

at

C1-H1

(2/3)

H-2

Table

H-1

:

Gauge

Height

at

C1-H1

(3/3)

H-3

Table

H-2

:

Gauge

Height

at

C1-H2

(1/2)

H-4

Table

H-2

:

Gauge

Height

at

C1-H2

(2/2)

H-5

Table

H-3

:

Gauge

Height

at

C1-H3

(1/2)

H-6

Table

H-3

:

Gauge

Height

at

C1-H3

(2/2)

H-7

Table

H-4

:

Gauge

Height

at

C1-H4

(1/2)

H-8

Table

H-4

:

Gauge

Height

at

C1-H4

(2/2)

H-9

Table

H-5

:

Gauge

Height

at

C1-H5

(1/2)

H-10

Table

H-5

:

Gauge

Height

at

C1-H5

(2/2)

H-11

Table

H-6

:

Gauge

Height

at

C1-H6

(1/2)

H-12

Table

H-6

:

Gauge

Height

at

C1-H6

(2/2)

H-13

Table

H-7

:

Gauge

Height

at

C1-H7

(1/2)

H-14

Table

H-7

:

Gauge

Height

at

C1-H7

(2/2)

H-15

Table

H-8

:

Gauge

Height

at

C1-H8

(1/2)

H-16

Table

H-8

:

Gauge

Height

at

C1-H8

(2.2)

H-17

Table

H-9:

Gauge

Height

at

C1-H9

(1/2)

H-18

Table

H-9

:

Gauge

Height

at

C1-H9

(2/2)

H-19

Table H-10 : Gauge Height at C1-H10 (1/2)

H-20

Table

H-10:

Gauge

Height

at

C1-H10

(2/2)

H-21

Table

H-11

:

Gauge

Height

at

C2-H1

(1/3)

H-22

Table

H-11

:

Gauge

Height

at

C2-H1

(2/3)

H-23

Table

H-11

:

Gauge

Height

at

C2-H1

(3/3)

H-24

Table

H-12

:

Gauge

Height

at

C2-H2(1/3)

H-25

Table

H-12

:

Gauge

Height

at

C2-H2(2/3)

H-26

Table

H-12

:

Gauge

Height

at

C2-H2(3/3)

H-27

Table

H-13

:

Gauge

Height

at

C2-H3

(1/3)

H-28

Table

H-13

:

Gauge

Height

at

C2-H3

(2/3)

H-29

Table

H-13

:

Gauge

Height

at

C2-H3

(3/3)

H-30

Table

H-14

:

Gauge

Height

at

C2-H4

(1/3)

H-31

Table

H-14

:

Gauge

Height

at

C2-H4

(2/3)

H-32

Table

H-14

:

Gauge

Height

at

C2-H4

(3/3)

H-33

Table

H-15

:

Gauge

Height

at

C2-H5

(1/3)

H-34

(5)

Table

H-17

:

Gauge

Height

at

C2-H8

(1/3)

H-40

Table

H-17

:

Gauge

Height

at

C2-H8

(2/3)

H-41

Table

H-17

:

Gauge

Height

at

C2-H8

(3/3)

H-42

LIST OF FIGURE

Fig. 1: Cross Section of Site C1-H1 at Stung Slot River National Road #1

F-1

Fig.2: Cross Section of site C1-H2 at Kampong Seong Station on road # 318

F-1

Fig. 3: Cross Section of site C1-H3 at

Tonle

Torch

River

F-2

Fig. 4: Cross Section of site C1-H4 on Road #11 downstream of bridge

F-2

Fig. 5: Cross Section of site C1-H5

of

Boeung

Sner

F-3

Fig. 6: Cross Section of site C1-H6 of Tonle Toch river at Peam Sdei

F-3

Fig. 7: Cross Section of site C1-H7 at Khsach Sar

F-4

Fig. 8: Cross Section of site C1-H8

at

Prek

Khsai

Kor

F-4

Fig. 9: Cross Section of site C1-H10 at Prek Raing on National Road #1

F-5

Fig. 10: Cross Section of site C2-H1

at

Bridge

No

24 F-5

Fig. 11: Cross Section at stite C2-H2

of

Bridge

No

23 F-6

Fig. 12: Cross Section of site C2-H3

at

Tros

bridge

F-6

Fig. 13: Cross Section of C2-H5 at Reay Pay

F-7

Fig. 14: Cross Section of site C2-H6

at

Anlong

Chrey

F-7

Fig. 15: Cross Section of site C2-H7

at

Anlong

Koki F-8

Fig. 16: Cross Section of site C2-H8

at

Bridge

No

17 F-8

Fig. 17: Cross Section of Stung Slot

river

at

C1-H1

F-9

Fig. 18: Cross Section of site C1-H2 at Kampong Seong Station on road # 318

F-9

Fig. 19: Cross Section of site C1-H3 at

Tonle

Torch

River

F-10

Fig. 20: Cross Section of site C1-H4 on Road #11 downstream of bridge

F-10

Fig. 21: Cross Section of site C1-H5 of Boeung Sner

F-11

Fig. 22: Cross Section of site C1-H6 of Tonle Toch river at Peam Sdei

F-11

Fig. 23: Cross Section of site C1-H7 at Khsach Sar

F-12

Fig. 24: Cross Section of site C1-H8 at Prek Khsai Kor

F-12

Fig. 25: Cross Section of site C1-H10 at Prek Raing on National Road #1

F-13

Fig. 26: Cross Section of site C2-H1

at

Bridge

No

24 F-13

Fig. 27: Cross Section at stite C2-H2

of

Bridge

No

23 F-14

Fig. 28: Cross Section of site C2-H3

at

Tros

bridge

F-14

Fig. 29: Cross Section of C2-H5 at Reay Pay

F-15

Fig. 30: Cross Section of site C2-H6

at

Anlong

Chrey

F-15

Fig. 31: Cross Section of site C2-H7

at

Anlong

Koki F-16

Fig. 32: Cross Section of site C2-H8

at

Bridge

No

17 F-16

Fig.33:

Monthly

rainfall

at

Pochentong

in

2007

F-17

Fig.34:

Monthly

Rainfall

at

Kandal

in

2007

F-18

Fig.35: Monthly Rainfall at Kompong

Cham

in

2007 F-19

Fig.36: Monthly Rainfall at Prey

Veng

in

2007

F-20

(6)

1 Introduction

The FMMP is cooperating with WWF Living Mekong Programme, and three Delft

Cluster institutes (UNESCO-IHE, Delft Hydraulics and Geodelft) to implement a 2 year

'Roads and Floods' project. The project aims at developing economically sound and

environmentally friendly guidelines for the planning and design of roads in the Mekong

floodplains of Cambodia and Vietnam. The project is an integral part of the FMMP

Component 2 and contributes to Output 1.3 ('guidelines for effectiveness, use and impact

assessment of structural interventions').

In order to achieve the objectives of the 'Roads and Floods' project, various field

survey/monitoring activities will be executed and additional data will be collected.

Generally, the activities will contribute to:

. Development of a detailed 1020 inundation model for the study area.

. Assessments of damage to infrastructure (roads and permeability structures) due to

flooding events. The type of damage and the underlying failure mechanisms will

be determined from survey data and possibly historical data;

The FMMP in cooperation with CNMC will coordinate the flood, post flood survey and

data collection activities in the Cambodia that will be contracted out to the Department of

Hydrology and River Work - Ministry of Water Resources and Meteorology. The survey

activities will focus on the area of two pilot sites in the Cambodia' flood plain with a size

of about 20 by 20 kilometers during the year 2006 and 2007.

The findings in the pilot sites will be scaled-up to representative sub-floodplain regions

for analyzing road and flood interactions and cumulative effects.

2 Pilot Sites to be Surveyed and Studied

The project team has selected two pilot sites in the Cambodia flood plain namely C 1

and C2 for further study. All survey activities will be undertaken in the two pilot

sites.

The coordinates for the pilot site are (UTM zone 48N Indian 1960):

. Upper right comer: 105°25' 19.0" E, 11 °25' 8.5" N

Zone 1 Zone 2 Zone 4 Zone 5 N 17 1 2 3 4 5 6 7 15 11 12 10 20 13 14 18 19 8 9 Kompong Cham Prek Kdam Mekong River Tonle Sap River

Pilot site C2

(7)

3 Field Survey Monitoring

The survey activities will be only carried out in the pilot sites which focus on road and

associated structure and hydraulic monitoring locations. The survey activities will be

conducted in two year 2006 and 2007 with two main group: i) flood survey for year 2006

and 2007 and ii) post flood survey for 2007 (post flood survey for 2006 will be done by

regional consultant and FMMP staff).

Table 1: Monitoring moments and specific scopes.

ANNEX A

MONOTORING LOCATIONS IN CAMBODIA IN PILOT SITE C1

Pilot site C1 (see Figure 1)

o The hydraulic monitoring will be executed in 10 different monitoring

locations

(codes C1-H1 till C1-H10), see Figures A.2 – A.10 for exact locations.

Figure A.1

Pilot site C1 in Cambodia.

Survey moment

Main scope

Time period

Flood monitoring

• Road condition

• Damage

• Flooding characteristics

One time in falling period

for 2006 flood and repeat

for 2007

Post-flood survey

• Road condition

• Damage

(8)

Figure A.2 Monitoring location C1-H1

(upstream of the bridge of Highway (national

road) #1 in the Prek Banam or Veal Robang

river)

Figure A.3 Monitoring location C1-H2

(downstream of the bridge of provincial road #

318 in the Prek Kampong Soeng or Prek

Trabek river)

C1-3

C1-4

(9)

Figure A.5 Monitoring location C1-H5 (could

possibly be similar to water level observation

station # 15 (Boeung Sner)

Figure A.6 Monitoring location C1-H6 (just

downstream of confluence in Tonle Toch

river, near Ph Peam Sdei)

Figure A.7 Monitoring location C1-H7 (west

of Ph Svay Khnei)

(10)

(11)

C2-H8

C2-H1

C2-H2

C2-H3

C2-H5

C2-H6

C2-H7

C2-H4

ANNEX B

MONOTORING LOCATIONS IN CAMBODIA IN PILOT SITE C2

o The hydraulic monitoring will be executed in 8 different monitoring

locations

(12)

B.2 Monitoring location C2-H1 (upstream of

the bridge of Highway (national road) # 6 in

the Prek Krang Svay river; similar to

monitoring location TLSV project - 2002)

B.3 Monitoring location C2-H2 (upstream

of the bridge of Highway (national road) #

6 in the Prek Muk Kampul river; similar to

monitoring location TLSV project - 2002)

B.4 Monitoring location C2-H3 (upstream of

the bridge of Highway (national road) # 6 in

Boeng Peal lake; similar to monitoring site

TLSV project - 2002)

(13)

B.6 Monitoring location C2-H5 (in the Prek

Kang Chak river, after the confluence with

the Prek Dei Kraham river, downstream of

the bridge)

B.7 Monitoring location C2-H6 (in the Prek

Muk Kampul, after the bifurcation with the

Prek Dei Kraham river)

B.8 Monitoring location C2-H7 (in the

stream draining Boeng Taprong lake into the

Prek Koy river, upstream of the bridge, near

Phum Anlong Koki)

B.9 Monitoring location C2-H8 (along

Highway (national road) # 6, upstream of

culvert in Phum Prek Dambang)

(14)

• Damage assessments to infrastructure (roads and permeability structures) due to

flooding events. The type of damage and the underlying failure mechanisms will be

determined from monitoring data and possibly historical data. Ideally, the damage

should be expressed in unit costs specified to different road classes. These activities

are referred to as ‘damage assessments’.

4 Flood Survey Requirement

The purposes of survey campaign in flood season area:

. to measure the water level and flows (hydraulic survey) at monitoring points for

hydraulic model development (including calibration, verification and simulations); and

. to collect information of road damages in the pilot sites for damage assessments.

A-Hydraulic survey requirement

The execution of the flood survey will be during the flood falling period in year 2006 and

repeated in year 2007 expectedly sometime in October. It means that only one flood

survey will be carried out per year. The damage survey will be conducted in the period of

hydraulic survey.

The hydraulic survey will be conducted at 18 monitoring locations. In site CI, there are

10 locations will measured namely CI-HI till CI-HIO. In site C2, there are 8 locations

(see figure B 1 to B9 in Annex B) will be measured namely C2-HI till C2-H8.

The hydraulic survey activities cover:

. To install 15 Staff gauge with Ha Tien datum (before flood come) at 15 monitoring

locations as described above. The traditional method should be employed for

leveling work but not by GPS method. Required accuracy for leveling is ±l cm.

. To simultaneously measure water levels and 2D velocity by ADCP at 15 installed

staff gauges. Discharge, water depth will be derived from measured water level and

2D velocity .

. To continuous collecting water levels at 4 permanent gauging stations (managed by

MOWRAM) in the floodplain (4 permanent stations: PI5 near site CI, P13 upstream

of site Cl, PI upstream of site C2, PIO downstream site);

Frequency of water levels and 2D velocity monitoring:

. Conducting 15 locations water level and 2D velocity measurement for two flood

seasons: 2006 and 2007.

. In each year, the measurement will be conducted 1 time during falling period of flood

season;

In each time at each location, the water level and 2D velocity at every monitoring

location will be continuously measured for 1 day with 1 hour interval. It means 11 water

levels and eleven 2D velocity values will be collected in one day at one site. Because of

limitation of equipment and staff, the measurement for all locations cannot be conducted

simultaneously. With available equipment and staff, it is planned to measure

(15)

Scopes of Work for Flood Marks Installation

To timely develop and install the flood-referencing tool (flood marks) in the

selected 18 flood marks. The flood marks installation should be done before

floods in 2006. According to the Terms of Reference, team should carry out tasks

and produce the outputs as follows

A

Install 15 flood marks at Two Pilot area C1 and C2:

B

Leveling survey

Measure the geographical location (zero gauge), position and height of the 18

flood marks at the 2 Pilot area based on the nearest bench marks at exiting flood

marks and Bassac and Neak Loung stations.

These GPS survey have to be carried out using similar technique applied with

Last flood marks installation project and Tonle Sap and its vicinity-TSLV project

1. Outputs

15 flood marks are installed according to the MRC standard at the selected

location as follows.

Village Name

Approx. Lat

Approx. Long Max. Flood (m)

No 1

C1-H1

535397

1242912

10.0 No 2

C1-H2

538812

1240428

5.00 No 3

C1-H3

531094

1251321

3.00 No 4

C1-H4

532055

1250666

3.00 No 5

C1-H5

541773

1257805

4.00 No 6

C1-H7

541220

1250476

3.00 No 7

C1-H8

531175

1247603

5.00 No 8

C1-H9

533995

1253707

4.00 No 9

C1-H10

533841

1244162

4.00 No 10

C2-H1

495606

1312424

8.00 No 11

C2-H2

496343

1310392

7.00 No 12

C2-H3

493865

1319268

7.00 No 13

C2-H4

510836

1310211

3.00 No 14

C2-H7

500654

1311503

2.00 No 15

C2-H8

497737

1306000

2.00 Fifteen geographic locations, latitude, longitude and height in either UTM zone

48, Everest Spheroid, WGS84 Datum, or UTM zone 48, Everest Spheroid,

INDIAN60 Datum, have to be delivered to MRC by TORs.

Installation Process

(16)

During the installation, at each location, the Village observer provided the

necessary services including the identification of proposed Flood mark spot and

others. The team measured the geographical locations (zero gauge), position and

height of the spots.The measurement the geographical location position and

elevation of two Pilot area was based on the benchmarks at Last flood marks

installation project and Bassac and Neak Loung Hydrological Station.( GPS

GARMIN)

NIVELER (TY: NA2- LEICA) was used for leveling relocate the flood marks.

The accuracy ±3mm.

The team consisted of Department of Hydrology and River Works official staff

from provincial/district Department. Names of those officials are as listed bellow

• Hydrology Department

1. Sam Sopheak Team Leader of flood marks installation

2. Khum Vanny Technical staff

3. Non Veun Technical staff

4. Den Rotha Driver

• Provincial/District observer

Pilot area C1

Nom Hen

Observer C1-H1

Sac Khor

Observer C1-H2

Tear Aer

Observer C1-H3

Tear Aer

Observer C1-H4

Tear Aer

Observer C1-H5

Pech Sophal

Observer C1-H7

Tear Aer

Observer C1-H8

Moun Mear

Observer C1-H9

Nom Hen

Observer C1-H10

Pilot area C2

Bo Sac

Observer C2-H1

Soun Tit

Observer C2-H2

Sorn Toeun

Observer C2-H3

Cheang Meng Keat

Observer C2-H4

Phout Bunhon

Observer C2-H7

Tho Sokha

Observer C2-H8

(17)

Scopes of Work for Flow Measurement Survey

The flow Measurement Survey has been done for flood monitoring from 24-Sep to 05 Oct 2007

and after flood from 24 Oct to 03 Nov 2007. According to the Terms of Reference, team should

carry out tasks and produce the outputs as follows

• Discharge Measurement:

- by using Accoustic Douppler Profiler (ADP) and Current Meter at C1

- by using Current Meter and Accoustic Douppler Current Profier (ADCP) for C2.

• Cross-Sectional Survey and Longitudinal Survey including river bank and river bed

survey by using ADCP and leveling instrument.

This kind of works covered several flood Plain C1 and C2 stations such as:

Village Name

Approx. Lat

Approx. Long Max. Flood (m)

No 1

C1-H1

535397

1242912

10.0 No 2

C1-H2

538812

1240428

5.00 No 3

C1-H3

531094

1251321

3.00 No 4

C1-H4

532055

1250666

3.00 No 5

C1-H5

541773

1257805

4.00 No 6

C1-H7

541220

1250476

3.00 No 7

C1-H8

531175

1247603

5.00 No 8

C1-H9

533995

1253707

4.00 No 9

C1-H10

533841

1244162

4.00 No 10

C2-H1

495606

1312424

8.00 No 11

C2-H2

496343

1310392

7.00 No 12

C2-H3

493865

1319268

7.00 No 13

C2-H4

510836

1310211

3.00 No 14

C2-H7

500654

1311503

2.00 No 15

C2-H8

497737

1306000

2.00 The result of the flood survey during 24-Sep to 05 Oct 2007 is as follows:

- 70 discharge measurements were made for C1

- 61 discharge measurements were made for C2

The result of the post flood survey 24 Oct to 03 Nov 200 is as follows:

- 70 discharge measurements were made for C1

- 61 discharge measurements were made for C2

(18)

Sites C1-H1

Sites C1-H2

(19)

Sites C1-H7

Sites C1-H8

(20)

Sites C2-H1

Sites C2-H2

Sites C2-H3

Sites C2-H4

(21)

Sites C2-H7

Sites C2-H8

(22)

B-1. Road Damage data at Site C1 during flood survey

- Road damage by wave and wind from the lake near Khsach Sar bridge.

- Location of road damage 05411403 and 1250526

48 P UTM Zone.

1- Depth

= 1.50 m

2- Width

= 1.00 m

3- Length

= 200 m

Road surface erosion

Direction slope 1 Direction slope 2

slope erosion 2?

Toe erosion 1? D2 = 1.5 m

(23)

- Road damage and concrete pipe across the road at the Phum kam Pang Khum Teay

Baphnom District . Location of road damage 05433730 and 1254937

48 P UTM Zone.

1- Depth

= 1.20 m

2- Width

= 6.00 m

3- Length

= 1.00 m

slope erosion 1?

Toe erosion 1?

slope erosion 2?

D1-2 = 1.00 m

(24)

- National Road # 1 damage by run-of rainfall far from Stung slot bridge about 700m

direct to Svay Rieng. Location of road damage 0535878 and 1242634

48 P UTM Zone.

1- Depth

= 1.20 m

2- Width

= 5.00 m

3- Length

= 0.50 m

W1-2=5 m Road surface erosion

slope erosion 1?

Toe erosion 1?

slope erosion 2?

(25)

- Road erosion at Kampong Soeing far from bridge about 15 m.

- Location of road damage 0538777 and 1240494

48 P UTM Zone.

1- Depth

1-2

= 0.60 m

2- Width

1-2

= 1.00 m

3- Length

1-2

= 2.00 m

(26)

- Road erosion at Baphnom before this site used concrete pipe now not used the structure

used big rock and the location of road damage 0541123 and 1243577

48 P UTM Zone.

1- Depth

1-2

= 2.00 m

2- Width

1-2

= 8.00 m

3- Length

1-2

= 1.00 m

D-2=2 m Road surface erosion

(27)

- Road erosion at baphnom district damage by big car. This road destroy by flood year

2002 and 2003. location of road damage 050029 and 1242486 48 P UTM Zone.

1- Depth

1-2

= 0.50 m

2- Width

1-2

= 20.00 m

3- Length

1-2

= 8.00 m

(28)

- Bank erosion by flow every year location of bank erosion old bridge and downstream of

new bridge .

1- Depth

1-2

= 3.00 m

2- Width

1-2

= 5.00 m

3- Length

1-2

= 150 m

(29)

B-2: Road Damage data at Site C1 in post flood survey

- Road damage by Run-off Rain fall at Babong Flood way. location of road damage 0537134

and 12594556 48 P UTM Zone.

1- Depth

= 0.50 m

2- Width

= 0.60 m

3- Length

= 25 m

(30)

- Road damage by Run-off Rain fall at Babong Flood way.

- Location of road damage 053715 and 12594572 48 P UTM Zone.

1- Depth

= 0.7 m

2- Width

= 0.2 m

3- Length

= 25 m

(31)

- Road damage by run-of rainfall& wave from lake at khsach sar . location of road damage

X 0541398 Y 1250526 and X 541058 Y 1250459

48 P UTM Zone.

1- Depth

= 2.00 m

2- Width

= 1.50 m

3- Length

= 340 m

(32)

C-1. Road Damage data at Site C2 during flood survey

ANLONG KOKY (C2-H7 )

Pilot Area

Monitoring location

X=500609

Y=1311429

Road surface erosion

Direction slope1:S

Direction slope2 :N

5m

Slope erosion1

Slope erosion2

D2=2m

Toe erosion2

Toe erosion1

W2=3m

(33)

PREK KOY ( C2-H7 )

Pilot Area

Monitoring location

X=500582

Y=1311037

Road surface erosion

Direction slope1:W

Direction slope2 :E

5.60m

Slope erosion1

Slope erosion2

(34)

PHUM REAYPAY (C2-H5 )

Pilot Area

Monitoring location

X=507706

Y=1318099

Road surface erosion

Direction slope1:S

Direction slope2 :N

4.00m

Slope erosion1

Slope erosion2

(35)

PHUM REAYPAY (C2-H5 )

Pilot Area

Monitoring location

X=507795

Y=1318038

Road surface erosion

Direction slope1:S

Direction slope2 :N

4.00m

Slope erosion1

Slope erosion2

D2=4.50m

Toe erosion2

Toe erosion1

W2=3m

(36)

PHUM PREKPANAK (C2-H5 )

Pilot Area

Monitoring location

X=506604

Y=1317130

Road surface erosion

Direction slope1:W

Direction slope2 :E

4.00m

Slope erosion1

Slope erosion2

(37)

C-2. Road Damage data at Site C2 in post flood survey

Phum Samrong, Khum Prey Koky, Srok Kang Measa, Kompong Cham Province

Pilot Area

Monitoring location

ANLONG KOKY (C2-H7)

X=499281

Y=1313431

Road surface erosion

Direction slope1:W

Direction slope2 :E

4m

Slope erosion1

Slope erosion2

D2=0.80m

Toe erosion2

Toe erosion1

W2=2.50m

(38)

Phum Samrong, Khum Prey Koky, Srok Kang Measa, Kompong Cham Province

Pilot Area

Monitoring location

ANLONG KOKY (C2-H7)

X=499218

Y=1313217

Road surface erosion

Direction slope1:W

Direction slope2 :E

4m

Slope erosion1

Slope erosion2

D2=0.75m

Toe erosion2

Toe erosion1

W2=1.50m

(39)

Phum Reay Pay 2, Khum Reay Pay Srok Kang Meas, Kompong Cham Province

Pilot Area

Monitoring location

REAYPAY ( C2 - H5 )

X=507631

Y=1318248

Road surface erosion

Direction slope1:S

Direction slope2 :N

4.00m

Slope erosion1

Slope erosion2

(40)

Phum Prek Panak, Khum Reay Pay, Srok Kang Meas, Kompong Cham Province

Pilot Area

Monitoring location

RAEYPAY ( C2-H5 )

X=506552

Y=1317060

Road surface erosion

Direction slope1:W

Direction slope2 :E

4.00m

Slope erosion1

Slope erosion2

(41)

5. Conclusion

The main work for installation is to transfer the Ha Tien elevation from National datum

benchmark to 15 locations. The average transferring distance from the benchmark to each pilot

site is 20 km. Adding in-site distance, the total transferring for, 1 site is 95 km. The installation

works has been done during 6 days working days

During the flow measurement of the sites C1 and C2 there are no flow at H7, H8,

C1-H9, C2-H4 and C2-H6.

There are 15 locations scattered in two pilot sites (9 in C 1 and 6 in C2). As required, there are

15 (Water level and Velocity) measurements in 10 hours of one day (1 hour interval). The break

time between two measurements of 50 minute The total survey -time for one campaign for C I is

12 days (10 days measurement and road damage survey) and C2 is 10 days (8 days measurement

road damage survey). In 1 day, in addition to 10 hours measurement, 3 more hours are required

for mobilization and demobilization. So 13 working hours is calculated for 1 location

measurement in 1 campaign. Two technical and 3 local staffs are standard team for this scale of

measurement.

Damage survey not seriously effect in case of the low flood in year 2007.

(42)

DISCHARGE MEASUREMENT

(43)

Ministry of Water Resource and Meteororogy

Vessel : . . . .

Depatment of Hydrology and River Works

Date : 25/09/2007

Hydrlogy Works Office

Operator : Mr. Horn Sovanna

Weather :

LOG SHEET Location 0535344 48P 1243037 UTM

Table 1 : ADP Discharge measurement at C1-H1

No Date Time Time Direction ADCP Conlig.File Data File Max Total Q H (m) Comments

Start Line End Line L.R/R.L Draft (m) wrc NYYMMDDhhmn W.D (m) (m³/sec)

(44)

Ministry of Water Resource and Meteororogy

Depatment of Hydrology and River Works

Vessel : . . . .

Hydrlogy Works Office

Date : 26/09/2007

Operator : . . Mr. Horn Sovanna . . . . LOG SHEET Weather : . . . .

Table 2 : ADP Discharge measurement at C1-H2

Location 0538815 48P 12400417 UTM

No Time Time Direction ADCP Conlig.File Data File Max Total Q H (m) Comments

(45)

Ministry of Water Resource and Meteororogy

Depatment of Hydrology and River Works

Vessel : . . . .

Hydrlogy Works Office

Date : 27/09/2007 Operator : . Mr. Horn Sovanna

LOG SHEET Weather : . . . .

Table 3 : ADP Discharge measurement at C1-H3

Location 0531050 48P 1251354 UTM Time Time Direction ADCP Conlig.File Data File Max Total Q H (m) Comments Start Line End Line L.R/R.L Draft (m) wrc NYYMMDDhhmn W.D (m) (m³/sec)

(46)

Ministry of Water Resource and Meteororogy

Depatment of Hydrology and River Works

Vessel : . . . .

Hydrlogy Works Office

Date : 27/09/2007

Operator : . Mr. Horn Sovanna

Table 4 : ADP Discharge measurement at C1-H4

Location 0532070 48P 1250680 UTM Time Time Direction ADCP Conlig.File Data File Max Total Q H (m) Comments Start Line End Line L.R/R.L Draft (m) wrc NYYMMDDhhmn W.D (m) (m³/sec)

(47)

Ministry of Water Resource and Meteororogy

Depatment of Hydrology and River Works

Hydrlogy Works Office

Table 5 : Discharge measurement by Current Meter at C1-H5

Mean Velocity Guage Height Dicharge G.H Time

m/sec in m m3/sec Change hrs

1 30-09-2007

104.30

15.06

0.203

0.16

2.898

9

0.00

0.29 Current meter

2 -

104.30

15.18

0.209

0.16

2.967

9

0.00

0.27 -3

-

104.30

15.08

0.203

0.16

2.911

9

0.00

0.24 -4

-

104.30

14.40

0.206

0.15

2.783

9

0.00

0.26 -5

-

104.30

14.18

0.204

0.15

2.723

9

0.00

0.25 -6

-

104.30

14.36

0.211

0.15

2.826

9

0.00

0.27 -7

-

104.30

15.08

0.211

0.16

2.926

9 -0.01

0.25 -8

-

104.30

15.48

0.213

0.16

3.039

9

0.00

0.24 -9

-

104.30

15.50

0.209

0.16

3.015

9

0.00

0.28 -10

-

104.30

15.16

0.209

0.16

2.914

9

0.00

0.27

-Meas / secs Remarks

(48)

Ministry of Water Resource and Meteororogy

Depatment of Hydrology and River Works

Vessel : . . .

Hydrlogy Works Office

Date : 03/10/2007

LOG SHEET Weather : . . .

Table 6 : ADP Discharge measurement at C1-H6

Location 0532646 48P 1262418 UTM

Time Time Direction ADCP Conlig.File Data File Max Total Q H (m) Comments

(49)

Ministry of Water Resource and Meteororogy

Depatment of Hydrology and River Works

Vessel : . . .

Hydrlogy Works Office

Date : 02/10/2007

Table 7 : ADP Discharge measurement at C1-H10

Location 0533819 48P 1244174 UTM

(50)

Ministry of Water Resource and Meteororogy

Vessel : . . .

Depatment of Hydrology and River Works

Date : 27/09/2007

Hydrlogy Works Office

Operator : Mr. Khun Thoeun

Weather : . . . .

LOG SHEET

Table 8 : ADP Discharge measurement at C2-H1

No Date Time Time Direction ADCP Data File Max Area Width Total Q H (m) Comments

Start Line End Line L.R/R.L Draft (m) NDDMMYYmmmr.sss depth, m m2 m (m³/sec)

(51)

Ministry of Water Resource and Meteororogy

Depatment of Hydrology and River Works

Vessel : . . . .

Hydrlogy Works Office

Date : 26/09/2007 Operator : Mr. Khun Thoeun

Table 9 : ADP Discharge measurement at C2-H2

No Time Time Direction ADCP Data File Max Area Width Total Q H (m) Comments

(52)

Ministry of Water Resource and Meteororogy

Depatment of Hydrology and River Works

Vessel : . . . .

Hydrlogy Works Office

Table 10 : ADCP Discharge measurement at C2-H3

Time Time Direction ADCP Data File Max Area Width Total Q H (m) Comments

(53)

Ministry of Water Resource and Meteororogy

Depatment of Hydrology and River Works

Hydrlogy Works Office

Table 11 : Discharge measurement by Current Meter at C2-H5

Mean Velocity

Guage Height

Dicharge

G.H

Time

m/sec

in m

m3/sec

Change

min

1 30-09-2007

2.50

2.88

0.163

3.04

0.163

0.00

20 Current meter

2 -

"

2.88

0.063

3.04

0.181

0.00

20 -3

-

"

2.88

0.064

3.04

0.184

0.00

15 -4

-

"

2.88

0.058

3.04

0.168

0.00

20 -5

-

"

2.88

0.063

3.04

0.183

0.00

15 -6

-

"

2.88

0.059

3.04

0.17

0.00

20 -7

-

"

2.88

0.064

3.04

0.185 -0.01

20 -8

-

"

2.88

0.064

3.04

0.183

0.00

15 -9

-

"

2.88

0.059

3.04

0.169

0.00

15 -10

-

"

2.88

0.065

3.04

1.186

0.00

15 -Note:

C2-H5 : Reay Pay

Remarks

No

Date

Width in m

Area m²

Ministry of Water Resource and Meteororogy

Depatment of Hydrology and River Works

Vessel : . . . .

Hydrlogy Works Office

Date : 29/09/2007 Operator : Khun Thoeun

LOG SHEET

Table 12 : ADCP Discharge measurement at C2-H6

Weather : . . . .

1 29/09/2007 9:44 9:45 L-R 0.25 P1_290907000r.000 7.66 182.03 34.42 0.93 8.18 L 4 m - R 4 m - 9:46 9:47 R-L - P1_290907001r.000 7.68 177.53 35.46 -0.4 - R 4 m - L 4 m

2 29/09/2007 NO FLOW

(54)

Ministry of Water Resource and Meteororogy

Depatment of Hydrology and River Works

Hydrlogy Works Office

Table 13 : Discharge measurement by Current Meter at C2-H7

Mean Velocity

Guage Height

Dicharge

Gauge Height

Time

m/sec

in m

m3/sec

Change

min

1 24/09/2007

43.80

177.68

0.182

7.54

32.372

0.00

25 By Current meter

2 -

"

177.68

0.184

7.54

32.609

0.00

20 Inflow to Boeung Takrong

3 -

"

177.68

0.178

7.54

31.659

0.00

20 -4

-

"

177.68

0.177

7.54

31.425

0.00

20 -5

-

"

177.68

0.179

7.54

31.802

0.00

15 -6

-

"

177.68

0.175

7.54

31.019

0.00

20 -7

-

"

177.68

0.177

7.54

31.435

0.00

15 -8

-

"

177.68

0.177

7.54

31.422

0.00

20 -9

-

"

177.68

0.178

7.54

31.637

0.00

20 -10

-

"

175.51

0.172

7.52

30.249

0.00

20 -Note:

C2-H7 : Anlong Koki Bridge

(55)

Ministry of Water Resource and Meteororogy

Depatment of Hydrology and River Works

Vessel : . . . .

Hydrlogy Works Office

Date : 25/09/2007

Table 14 : ADCP Discharge measurement at C2-H8

(56)

DISCHARGE MEASUREMENT

(57)

Ministry of Water Resource and Meteororogy

Vessel : . . . .

Depatment of Hydrology and River Works

Date : 24/10/2007

Hydrlogy Works Office

Operator : . . Mr. Horn Sovanna . . . . Weather : . . . .

LOG SHEET Location 0535344 48P 1243037 UTM

Table 15 : ADP Discharge measurement at C1-H1

Start Line End Line L.R/R.L Draft (m) wrc NDDMMYYmmmr.sss W.D (m) (m³/sec)

(58)

Ministry of Water Resource and Meteororogy

Depatment of Hydrology and River Works

Vessel : . . . .

Hydrlogy Works Office

Date : 25/10/2007

Table 16 : ADP Discharge measurement at C1-H2

Location 0538815 48P 12400417 UTM

No Time Time Direction ADCP Conlig.File Data File Max Total Q H (m) Comments

(59)

Ministry of Water Resource and Meteororogy

Depatment of Hydrology and River Works

Vessel : . . . .

Hydrlogy Works Office

Date : 26/10/2007

Table 17 : ADCP Discharge measurement at C1-H3

Location 0531050 48P 1251354 UTM

(60)

Ministry of Water Resource and Meteororogy

Depatment of Hydrology and River Works

Vessel : . . . .

Hydrlogy Works Office

Date : 26/10/2007

Table 18 : ADCP Discharge measurement at C1-H4

Location 0532070 48P 1250680 UTM

(61)

Ministry of Water Resource and Meteororogy

Depatment of Hydrology and River Works

Hydrlogy Works Office

Table 19 : Discharge measurement by Current Meter at C1-H5

m/sec in m m3/sec Change hrs

1 27-10-2007

104.30

47.21

1.018

0.51

47.62

9

0.00

0.27 Current meter

2 -

104.30

47.21

1.019

0.51

47.49

9

0.00

0.18 -3

-

104.30

47.21

1.013

0.51

47.21

9

0.00

0.15 -4

-

104.30

46.29

1.004

0.50

46.15

9

0.00

0.22 -5

-

104.30

46.29

1.012

0.50

46.29

9

0.00

0.21 -6

-

104.30

46.29

1.009

0.50

46.24

9

0.00

0.20 -7

-

104.30

45.47

1.003

0.49

45.14

9

0.00

0.21 -8

-

104.30

45.47

0.997

0.49

44.88

9

0.00

0.23 -9

-

104.30

45.47

0.993

0.49

44.67

9

0.00

0.20 -10

-

104.30

45.47

0.991

0.49

44.62

9

0.00

0.20

-Meas / secs Remarks

(62)

Ministry of Water Resource and Meteororogy

Vessel : . . . .

Depatment of Hydrology and River Works

Date : 30/10/2007

Hydrlogy Works Office

Operator : . . Mr. Horn Sovanna . . . .

Weather : . . . .

LOG SHEET

Table 20 : ADCP Discharge measurement at C1-H6

Location 0532646 48P 1262418 UTM

(63)

Ministry of Water Resource and Meteororogy

Depatment of Hydrology and River Works

Vessel : . . . .

Hydrlogy Works Office

Date : 31/10/2007

Table 21 : ADCP Discharge measurement at C1-H10

Location 0533819 48P 1244174 UTM

(64)

Ministry of Water Resource and Meteororogy

Depatment of Hydrology and River Works

Vessel : . . . .

Hydrlogy Works Office

Date : 28/10/2007

Table 22 : ADP Discharge measurement at C2-H1

(65)

Ministry of Water Resource and Meteororogy

Depatment of Hydrology and River Works

Vessel : . . . .

Hydrlogy Works Office

Table 23 : ADP Discharge measurement at C2-H2

(66)

Ministry of Water Resource and Meteororogy

Depatment of Hydrology and River Works

Vessel : . . . .

Hydrlogy Works Office

Table 24 : ADCP Discharge measurement at C2-H3

Location 0531050 48P 1251354 UTM

(67)

Ministry of Water Resource and Meteororogy

Depatment of Hydrology and River Works

Hydrlogy Works Office

Table 25 : Discharge measurement by Current Meter at C2-H5

m/sec in m m3/sec Change min

1 31/10/2007

2.50 2.82 0.20 2.94 0.563

0.00

15 Current meter

2 -

" 2.82 0.20 2.94 0.55

0.00

15 Water gate

3 -

" 2.82 0.20 " 0.563

0.00

10 -4

-

" 2.82 0.20 " 0.56

0.00

10 -5

-

" 2.82 0.20 " 0.555

0.00

15 -6

-

" 2.82 0.20 " 0.566

0.00

13 -7

-

" 2.82 0.20 " 0.555

0.00

10 -8

-

" 2.78 0.19 2.93 0.516

0.00

15 -9

-

" 2.78 0.18 2.92 0.493

0.00

15 -10

-

" 2.70 0.17 2.9 0.458

0.00

15 -Note:

C2-H5 : Reay Pay

Meas / secs Remarks

(68)

Ministry of Water Resource and Meteororogy

Depatment of Hydrology and River Works

Vessel : . . . .

Hydrlogy Works Office

Date : 30/10/2007

Operator : . . . . LOG SHEET

Table 26 : ADCP Discharge measurement at C2-H6

Weather : . . . .

Location 0532646 48P 1262418 UTM

1 30/10/2007 9:26 9:28 R-L 0.25 P1_301007000r.000 7.60 189.49 35.27 -4.78 8.23 L 4 m - R 4 m - 9:28 9:29 L-R - P1_301007001r.000 7.61 184.96 35.03 -0.11 - R 4 m - L 4 m

2 30/10/2007 no flow

-

-Note: C2-H6 : Anlong Chrey No Date

Ministry of Water Resource and Meteororogy

Depatment of Hydrology and River Works

Hydrlogy Works Office

Table 27 : Discharge measurement by Current Meter at C2-H7

Mean Velocity

Guage Height

Dicharge

G.H

Time

m/sec

in m

m3/sec

Change

min

1 25/10/2007

43.80

180.52

0.241

7.64

43.468

0.00

20 By Current Meter

2 -

"

0.243 "

43.930

0.00

20 Inflow to Beong Takrong

3 -

"

0.277 "

50.042 -0.01

20 -4

-

"

180.00

0.287

7.62

51.592

0.00

25 -5

-

"

0.275 "

49.424

0.00

20 -Meas / secs

Remarks

(69)

Ministry of Water Resource and Meteororogy

Vessel : . . . .

Depatment of Hydrology and River Works

Date : 26/10/2007

Hydrlogy Works Office

Weather : . . . . LOG SHEET

Table 28 : ADP Discharge measurement at C2-H8

No Date Time Time Direction ADCP Data File Max Area Width Total Q H (m) Comments

Report on monitoring in the flood season in Cambodia in 2006 en 2007

Title Deliverable: