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Survey Report

JUNE 2017

Institute of Water Modelling

EUROCONSULT MOTT MACDONALD EMERGENCY SURVEY OF THE LOWER BHADRA RIVER ATPOLDER 29 UNDER BLUE GOLD PROGRAM

SURVEY REPORT

TABLE OF CONTENTS

Table of Contents.................................................................................................................. 2List of Figures....................................................................................................................... 2List of Tables ........................................................................................................................ 3Appendices ........................................................................................................................... 31. Introduction ................................................................................................................... 42. Scope of the Works ........................................................................................................ 43. Survey Area ................................................................................................................... 54. Summary of Activities ................................................................................................... 65. Survey Methodologies ................................................................................................... 7

5.1 Reference Bench Marks....................................................................................... 75.2 Co-ordinate System and Datum ........................................................................... 85.2.1 Ellipsoid: WGS-84 (No Datum Transformation Required) ............................... 85.2.2 Projection Parameter: ....................................................................................... 85.2.3 Vertical Elevation Datum................................................................................. 85.3 Water Level Observation ..................................................................................... 95.4 Bathymetric Survey ........................................................................................... 115.4.1 River bank survey .......................................................................................... 125.5 ADCP measurement .......................................................................................... 135.6 Suspended Sediment Concentration ................................................................... 145.7 Bed Sampling & Analysis.................................................................................. 155.8 Float Tracking ................................................................................................... 175.9 Drilling.............................................................................................................. 21

LIST OF FIGURES

Figure 1 Survey index and Locations map...................................................................................5

Figure 2. Reference BWDB benchmark, Jaliakhali Sluice (right), RTK Base Station (left) ..........7

Figure 3 Water level hydrographs near Jaliakhali sluice on the Lower Bhadra River .................10

Figure 4 WL gauge near Jaliakhali Sluice..................................................................................10

Figure 5 Bathymetric survey .....................................................................................................11

Figure 6 Screen shot of NavEDIT module while checking a section ..........................................12

Figure 7 Sample topographic survey cross section.....................................................................12

Figure 8: River Ray ADCP geo referencing with Trimble SPS 855 RTK GPS...........................13

Figure 9: Snapshot from the WinRiver Software presenting velocity and discharge data ...........14


SURVEY REPORT

Figure 10: Sample discharge hydrograph...................................................................................14

Figure 11 Sampling for suspended sediment concentration using submerjable pump .................15

Figure 12 Suspended Sediment Conceration Analysis Lab,IWM. ..............................................15

Figure 13 River Bed sapling using Van Veen Grab Sampler......................................................16

Figure 14 Grain size distribution of Sample 3............................................................................17

Figure 15:Float Tracking in the River........................................................................................18

LIST OF TABLES

Table 1: Summary of activities 1st campaign ..............................................................................6

Table 2: Summary of activities 2nd campaignities 2nd campaign ................................................6

Table 3: List of TBMs.................................................................................................................8

Table 4: Description of the water level stations ...........................................................................9

Table 5: Float Tracking Log during May 13-14, 2017 on the Lower Bhadra River ....................19

Table 6: Float Tracking Log during May 27-28, 2017 on the Lower Bhadra River ....................20

APPENDICES

Appendix I: ADCP Discharge Data

Appendix II: Suspended Sediment Concentration Analysis

Appendix III: River Bed Materials Analysis

Appendix IV: Float Tracking Map

Appendix V: Bathymetry Chart map and Cross Sections Plots


SURVEY REPORT

1. INTRODUCTION

Institute of Water Modelling (IWM) has been assigned by Euroconsult Mott Macdonald

under Blue Gold Program to conduct emergency survey of the Lower Bhadra River at Polder

29. This report additions to the data collected and delivered in soft formats with brief

descriptions of the methodologies followed during the survey.

2. SCOPE OF THE WORKS

Scope of the work consists of bathymetric surveys, Flow measurement, Water Level, Float

Tracking, Suspended sediment concentration sampling, River Bed materials grain size

analysis and drilling boreholes. The scope of work for the survey can be summarizes as

following:

• Bathymetric Survey by using RTK-GPS and Echo-sounder

• Flow measurement by Acoustic Doppler Current Profile (ADCP)

• Water Level observation by pressure sensor during bathymetric survey

• Float Tracking.

• Water Sampling for observing Suspended Sediment Concentration

• River bed sampling for grain size analysis

• Drilling


SURVEY REPORT

3. SURVEY AREA

The measurement locations are shown in Figure 1.

Figure 1 Survey index and Locations map


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4. SUMMARY OF ACTIVITIES

A summary of the activities performed in connection with the campaigns are given in Table 1

and Table 2 for 1st campaign and 2nd campaign accordingly.

Table 1: Summary of activities 1st campaign (May 13-14, 2017)

ItemNo.

Description Unit Target Achievement Equipment and Software Used

1Bathymetric Survey forRiver bed along withbank survey

no 59 62

Dual frequency digital echo-sounderCV 200, coupled with TrimbleSPS855 RTK GPS using Hydro-prosoftware and other auxiliaryequipment. Trimble R6 RTK-GPSused for dry part

2 Flow measurementusing ADCP days 2 2

Teledyne RD Instruments River RayADCP, Trimble SPS855 RTK GPSand WinRiver II software

3 Float Tracks days 2 2 Special type of float and handheldGPS

4 Water Level Gauges no 3 3 pressure sensor and staff gauges

5Suspended SedimentSampling and Analysisof total concentration

no 32 40Mini Submersible Pump (Made byEijkelkemp, the Netherlands), vacuumpump and filter

6 River Bed MaterialSampling and Analysis no 4 4 Van Veen Grab Sampler, sieve

andreasson tube

Table 2: Summary of activities 2nd campaignities 2nd campaign (May 27-28, 2017)

ItemNo.

Description Unit Target Achievement Equipment and Software Used

1 Flow measurementusing ADCP days 2 2

Teledyne RD Instruments River RayADCP, Trimble SPS855 RTK GPSand WinRiver II software

2 Float Tracks days 2 2 Special type of float and handheldGPS

3 Water Level Gauges no 3 3 pressure sensor and staff gauges

4Suspended SedimentSampling and Analysisof total concentration

no 32 32Mini Submersible Pump (Made byEijkelkemp, the Netherlands),vacuum pump and filter

5 Drilling Works each 3 3 Survey done by IWM outside (M/SBIDCON Ltd.


SURVEY REPORT

5. SURVEY METHODOLOGIES

5.1 Reference Bench Marks

The reference BWDB Bench Mark on the Jaliakhali Sluice has been used for the entire

survey works. The vertical elevation is used 3.976m PWD provided by the client of the

Jaliakhali sluice at km 23+000, Village Jaliakhali (south-west corner of the head wall). The

horizontal position: E 749213.613; N 2508660.829) have been established with reference to

the RTK base station used for ADCP and bathymetric survey. RTK base station has been

establish averaging of here position. Reference stations both horizontal and vertical shown in

Figure 2. Selected TBMs have been kept during leveling survey along the river bank for

water level gauge connection given in the Table 3.

Figure 2. Reference BWDB benchmark, Jaliakhali Sluice (right), RTK Base Station (left)


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Table 3: List of TBMs

SLNo. TBM ID TBM Discription Easting Northing RL

(mPWD)

1 TBM-01

Kept on the 1st Landing top SEcorner of Bittabiralla Govt.Primary School, PS: Dumuria,Khulna.

749652 2509718 4.128

2 TBM-02

BWDB Bench Mark on the headwall, SW corner of JaliakhaliSluice gate, Km: 23+000, Vill:Jaliakhali, PS: Dumuria, Khulna,used as reference Bench Mark.

749211 2508664 3.976

3 TBM-03Engraved on the railing top NEcorner at sluice gate, Baroaria,Vill: Baroaria, PS: Batiaghata

749325 2507053 5.022

4 TBM-04

Marked with Red paint, sittingbench SE corner, Main gate ofhouse of Kartik ChandraMondol, Vill: Baroaria, PS:Batiaghata, Khulna

748132 2506589 3.129

5.2 Co-ordinate System and Datum

Universal Transverse Mercator (UTM) projection system has been used for data collection as

well as projection of Maps & Charts. This is to mention here that entire survey area is under

UTM 45N zone. The parameters of the system are as below.

5.2.1 Ellipsoid: WGS-84 (No Datum Transformation Required)

Semi-major axis a = 6,378,137 mSemi-minor axis b = 6,356,752.3142 mInverse flattening 1/f = 298.25722

5.2.2 Projection Parameter:

Latitude of origin = 0°Central meridian = 87°False Northing = 0False Easting = 500,000mScale Factor = 0.99965.2.3 Vertical Elevation Datum

Elevations are presented in mPWD level datum provided by the client.


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5.3 Water Level Observation

Water level data have been recorded at three locations in the survey area as presented in

Table 4. Recorded data used for tide correction of bathymetry survey. The data were

collected by installing pressure cell as well as by installing staff gauges for cross checking

and calibrate sensor data to m PWD. Gauge readers took the gauge reading during daytime at

30min interval. Automatic data were recorded at 10 minute interval by pressure cell

(continuously). The gauges were connected from nearest Temporary Bench Marks (TBM)

that was connected from the existing reference BWDB benchmark on the Jaliakhali Sluice

gate. Sample Water level hydrographs near Jaliakhali sluice is presented in Figure 3 while the

installed gauge at Jaliakhali Sluice also shown in Figure 4.

Table 4: Description of the water level stations

Stn-No Stn-Name Description Easting(UTM)

Northing(UTM)

1 Chandghar Data Recorded Continuously at 10min interval from May 12-16 andMay 27-28, 2017 by using pressurecell as well as staff gauge.Unfortunately, pressure cell could notcommunicate with the computer fordownload-recorded data. However,staff gauge data have been used.

749879 2509859

2 JaliakhaliSluice

Data Recorded Continuously at 10min interval from May 12-16 andMay 27-28, 2017 by using pressurecell as well as staff gauge. WL datahave been used for tide correction ofbathymetric survey data.

749309 2508653

3 Baroaria Data Recorded Continuously at 10min interval from May 12-16 andMay 27-28, 2017 by using pressurecell as well as staff gauge. WL datahave been used for tide correction ofbathymetric survey data.

748144 2506539


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Figure 3 Water level hydrographs near Jaliakhali sluice on the Lower Bhadra River

Figure 4 WL gauge near Jaliakhali Sluice

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SURVEY REPORT

5.4 Bathymetric Survey

The bathymetric survey has been done using dual frequency digital Echo-sounder (Echotrac

CV 200) and Trimble SPS 855 RTK GPS, as shown in Figure 5. Calibration of the Echo

sounder was done daily before and after measurements with the help of a bar checks. A

Laptop computer with Trimble Hydro Pro software was used to interface the instruments. The

Hydro Pro Navigation software guides the survey boat on the desired transects. The

horizontal accuracy of the data is within ±1.0m as no data was accepted with a solution less

than DGPS and the vertical accuracy is ±0.02m (high frequency transducer). The survey data

is stored in tabular format MS Access database during survey by the software. The NavEdit

module of the software compiles depth of water column and position of sounding with time.

The depth and position data can be viewed both graphically and in tabular form in the

software, see Figure 06. The erroneous data is removed by checking the sections during

processing.

Figure 5 Bathymetric survey

Water level was observed during bathymetric survey by using pressure cell within project

area. The edited data is then exported into ASCII format from the NavEdit module of Hydro-

Pro software. Finally, the contour map and bathymetric chart are produced from the

processing module of the same software. Bathymetry Chart map and Cross Sections Plots

given in the Appendix V.


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Figure 6 Screen shot of NavEDIT module while checking a section

5.4.1 River bank survey

Cross sections were surveyed in combination with bathymetric and dry part of the river bank

(both edges of bathymetric transect). Most of the underwater parts of the cross sections are

surveyed through bathymetric survey using dual frequency echo sounder and RTK GPS while

the land parts are surveyed with Trimble R6 RTK GNSS. Bank survey using RTK GPS is

presented in Figure 07. All the combined cross section plots are enclosed in Appendix V.

Figure 7 Sample Bank survey using Trimble R6 RTK GNSS


SURVEY REPORT

5.5 ADCP measurement

Flow velocity and discharge measurements have been made at 4 locations as per specification

provided by the client. Tidal flow measurements have been carried out for two days (May 13-

14, 2017) during full moon and two days (May 27-28, 2017) during new moon for 13 hours.

ADCP measurement transects given in the Figure 1. Teledyne RD Instruments River Ray

ADCP and Trimble SPS 855 RTK GNSS with a base station have been utilized (Figure 08)

for the measurement. This ADCP model is capable of bottom tracking and can measure

discharge in moving boat condition. The measurements were made following WinRiverII

user guide supplied by the manufacturer of the instrument. The software estimates the

discharge of unmeasured areas (the top of instrument face, near bottom part and at edges).

The river flow is calculated real-time by the WinRiver II Software by adding discharge of

each ensemble as it moves along the transect line. Summary of discharge (BT) along with

hydrograph for each transects presented in Appendix-I. The amount of discharge is not

corrected for bed movement. It is observed that magnitude of bed movement varies with

sediment concentration, which is also very high as observed from the stationary and loop test

result. All raw ADCP data provided to the client as requested. A velocity contour along with

ship track of discharge data collected during survey is shown in Figure-10. A sample tidal

discharge hydrograph for ADCP transect-4 shown in Figure-11.

Figure 8: River Ray ADCP geo referencing with Trimble SPS 855 RTK GPS


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Figure 9: Snapshot from the WinRiver Software presenting velocity and discharge data

Figure 10: Sample discharge hydrograph

5.6 Suspended Sediment Concentration

Water samples for suspended sediment concentration (SSC) have been collected using Mini

Submersible Pump (Made by Eijkelkemp, the Netherlands). The pump is fitted 3/8” dia tube

and operated by 12V battery. It is very suitable for SS samples collection. The pump is

lowered at the desired depth by using weight and rope. Water is withdrawn and collected in

sampling bottle (250ml-500ml) Figure 11. Samples have been brought to IWM sediment lab


SURVEY REPORT

at Dhaka and analyzed for total concentration using filtration technic (vacuam pump and

filter) shown in Figure 12. SSC have been collected during ADCP measurment transects at 4

stations. At each station, samples were collected from two depths (one third and two third

depth from the water surface ) according to client specification. Around 250ml water sample

was collected each time from each depth. It was planned to collect totalling of 64 samples (1st

and 2nd campaign) from 4 ADCP transects. Suspended Sediment Concentrations (SSC)

results are provided in the Appendix II.

5.7 Bed Sampling & Analysis

River bed material sampling have been collected from the thalweg at the ADCP transects

using Van Veen Grab Sampler. The Van Veen Grab sampler consists of cupped jaws that

close to trap a sample of bed material. Grab bucket sampler is shown in Figure 13. Samples

have been brought to Dhaka and tested in the IWM Laboratory by dry sieving method and

andreasson tube method. A total of 4 samples were collected. The grain size distribution of

Figure 11 Sampling for suspended sediment concentration using Submersible Pump

Figure 12 Suspended Sediment Conceration Analysis Lab,IWM.


SURVEY REPORT

bed materials are usually estimated by sieve analysis. In the case of most cohesion less soils

(gravel, sand and silt), distribution of grain size could be determined by sieve analysis.

Cohesive soils (clay) cannot be separated by sieve analysis into size categories because no

practical sieve can be made with openings so small; instead, particle sizes are determined by

observing settling velocities of the particles in the water mixture. Sieving through a 63

microns sieve separates samples for grain size analysis. The portion above 63 microns is

analysed by dry sieving and the portion below 63 microns is analysed by observing settling

velocity of the sediments in Andresen Settling Tube. Grain size distributions for all the

collected samples given in Appendix III while a sample result is shown in Figure 14.

Figure 13 River Bed sapling using Van Veen Grab Sampler


SURVEY REPORT

Figure 14 Grain size distribution of Sample 4

5.8 Float Tracking

4 days (2017, May 13-14 & May 27-28) float tracking have been performed by using special

type of float prepared for the same works. 30 tracks have been recorded during the period.

Among these, 18 tracks have been recorded during ebbing tide and 12 tracks during flooding

tide. Float track log presented in Table 3 & 4 for 1st and 2nd campaign accordingly. The float

has arrangement for keeping handheld GPS on it. The GPS configured to record track data at

a fixed interval of 10 sec. The data have been recorded along the river reach (Figure 15)

started every hour between 6 am to 7 pm from the upstream boundary during the receding

tide and from the downstream boundary during the incoming tide. The GPS data downloaded

in the office using “OziExplorer” software and exported to shape file for plotting in ArcGIS

providing in the Appendix IV. Tracking remained suspend during slack time due to very low

velocity.


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Figure 15:Float Tracking in the River


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Table 5: Float Tracking Log during May 13-14, 2017 on the Lower Bhadra River

Date Track ID Start Time End Time Tide Condition(Ebbing/flooding)

13-05-2017 K131_01 6:25 8:30 Ebbing

13-05-2017 B131_02 7:07 8:46 Ebbing

13-05-2017 R131_03 8:01 9:28 Ebbing

13-05-2017 R131_04 9:39 11:10 Flooding

13-05-2017 K131_05 10:45 12:18 Flooding

13-05-2017 B131_06 12:09 14:13 Flooding

13-05-2017 R131_07 12:48 14:36 Flooding

13-05-2017 K132_08 16:17 18:16 Ebbing

13-05-2017 B132_09 17:08 17:59 Ebbing

13-05-2017 R132_10 17:54 18:29 Ebbing

14-05-2017 K141_11 6:18 7:28 Ebbing

14-05-2017 R141_12 7:00 8:13 Ebbing

14-05-2017 R141_13 11:14 12:51 Flooding

14-05-2017 K141_14 12:04 14:06 Flooding

14-05-2017 K142_15 18:45 19:07 Ebbing


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Table 6: Float Tracking Log during May 27-28, 2017 on the Lower Bhadra River

Date Track ID Start Time End Time Tide Condition(Ebbing/flooding)

27-05-2017 K27_1 6:03 6:58 Ebbing

27-05-2017 Z27_1 6:31 8:12 Ebbing

27-05-2017 K27_2 9:40 10:42 Flooding

27-05-2017 Z27_2 10:34 11:47 Flooding

27-05-2017 K27_3 12:00 13:28 Flooding

27-05-2017 K27_4 17:12 19:16 Ebbing

27-05-2017 Z27_3 17:44 19:22 Ebbing

28-05-2017 K28_1 5:07 6:58 Ebbing

28-05-2017 Z281_1 6:32 7:41 Ebbing

28-05-2017 K28_2 8:19 9:37 Ebbing

28-05-2017 Z281_2 10:24 11:28 Flooding

28-05-2017 K28_3 11:20 12:53 Flooding

28-05-2017 Z281_3 12:36 14:21 Flooding

28-05-2017 Z282_1 17:18 18:10 Ebbing

28-05-2017 K282_1 17:31 18:13 Ebbing


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5.9 Drilling

M/S BIDCON Ltd was engaged for the drilling work. The work has been done in presence

IWM representative as well as representative from Blue Gold office,Khulna. Three boreholes

have been drilled to a depth of 30m from the river bed level. Location of boreholes selected

by the engineer in charge shown in the index map Figure 1. The drilling team has collected

one (01) undisturbed sample from the boring location-2 at 8.5m depth and Disturbed samples

have been collected at 1.0m intervals for first 6.0m and 1.5m intervals up to 30m depth

according to specification provided. Collected undisturbed sample and 9 disturbed samples

(3X3) within 15m depth have been send to Bureau of Research, Testing and Consultation

(BRTC, BUET) on 20th June 2017 for Triaxial Shear test and Direct Shear test. BRTC Test

report will be provided upon receipt from the BUET. The borehole report has been prepared

by M/S BIDCON Ltd which contains SPT values, Sieve and hydrometer analysis, Liquid

limit and plastic limit test results and bore log submitted separately.

Borehole Position in UTM:

SLNo Borehole Easting (m) Northing (m)

1 Borehole-1 749612 2509478

2 Borehole-2 749472 2509254

3 Borehole-3 749383 2509042

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Tidal Discharge at Transect-1 at 13/05/2017:

Transect Time Total Discharge

(cumec) Velocity (m/s) Flow Dir. (Degree)

ADCP 1000 7:50:31 620.2 1.329 219.15

ADCP 1002 10:35:34 -940.6 1.286 38.02

ADCP 1004 11:33:07 -1205.4 1.312 41.11

ADCP 1006 13:52:51 -662.8 0.329 37.1

ADCP 1008 14:46:56 -201.8 0.043 36.68

ADCP 1011 16:57:55 604.1 0.677 222.72

ADCP 1013 17:26:19 756 0.849 222.7




ADCP -1001 5:24:12 792 0.851 221.09

ADCP -1002 7:19:16 816.6 1.345 219.04

ADCP -1004 8:11:12 663.8 1.259 219.22

ADCP -1007 10:26:11 -329 0.297 30.8

ADCP -1008 13:40:45 -1135.9 0.622 37.23

ADCP -1010 14:31:51 -625 0.284 36.91

ADCP -1013 19:57:54 474.5 1.315 215.59




adcp1000 5:21:50 1045.788 1.051 220.08

adcp1002 8:11:12 522.377 1.144 218.44

adcp1005 9:11:57 238.251 0.506 212.75

adcp1006 11:00:16 -1447.52 1.184 40.48

adcp1009 13:05:03 -1017.31 0.531 39.28

adcp1012 15:46:25 100.163 0.038 230.37

adcp1015 18:04:15 948.435 0.837 220.83




ADCP_1001 5:17:15 780.017 0.601 218.29

ADCP_1002 7:40:15 874.644 1.264 218.11

ADCP_1004 8:10:11 762.492 1.265 217.26

ADCP_1006 9:59:08 310.864 0.599 224.18

ADCP_1009 12:20:22 -1360.72 0.854 46.9

ADCP_1010 14:14:27 -637.078 0.36 51.74

ADCP_1013 14:41:29 -323.695 0.207 52.79

ADCP_1015 16:21:21 -13.514 0.021 255.85




ADCP -2001 8:22:55 470.2 1.119 182.53

ADCP -2003 10:19:36 -960.1 0.82 4.36

ADCP -2005 12:03:47 -1476.2 1.092 358.74

ADCP -2006 13:19:03 -1158.1 0.703 355.32

ADCP -2009 15:13:51 52.04 0.095 200.28

ADCP -2011 16:35:41 608 0.708 188.47

ADCP -2012 17:45:04 912.9 1.069 184.96




ADCP -2001 5:42:34 1027.70 1.214 184.34

ADCP -2002 6:50:18 952.60 1.476 183.65

ADCP -2004 8:41:19 530.00 1.147 186.46

ADCP -2007 10:07:29 -58.16 0.167 201.09

ADCP -2010 11:27:45 -878.40 1.371 1.31

ADCP -2014 13:27:36 -1361.70 0.793 357.77

ADCP -2015 14:54:20 -360.00 0.166 24.49

ADCP -2017 19:30:02 747.20 1.474 185.68




ADCP -2000 7:40:11 625.068 0.906 172.72

ADCP -2003 9:38:45 -710.968 0.86 12.58

ADCP -2005 10:48:00 -1466.2 1.223 358.2

ADCP -2006 11:37:33 -1581.44 0.882 6.36

ADCP -2008 12:46:36 -1399.93 0.792 358.99

ADCP -2011 13:52:56 -244.012 0.123 55.46

ADCP -2013 15:21:22 48.884 0.045 167.95

ADCP -2015 16:22:12 397.003 0.271 187.34

ADCP -2017 17:37:28 1079.489 0.819 184.63

ADCP -2019 18:21:54 1117.93 0.981 182.3




ADCP_2000 5:38:44 1115.38 0.891 178.93

ADCP_2002 7:11:16 991.80 1.017 173.74

ADCP_2004 8:26:57 662.68 0.925 169.51

ADCP_2006 9:36:20 418.36 0.606 172.41

ADCP_2009 10:22:42 -587.03 0.718 8.27

ADCP_2011 11:41:49 -1353.79 1.213 355.62

ADCP_2013 12:44:13 -1415.29 0.838 356.98

ADCP_2015 13:57:17 -899.16 0.464 357.06

ADCP_2017 15:01:21 -153.22 0.066 9.16

ADCP_2018 16:00:47 -22.82 0.057 74.23

ADCP_2020 16:54:58 296.163 0.181 186.39

ADCP_2022 18:55:53 1057.93 0.913 186.16




ADCP -3000 8:39:13 515.7 0.353 285.2

ADCP -3003 9:59:35 -806.8 0.431 80.77

ADCP -3004 12:18:36 -1204.4 0.684 98.9

ADCP -3006 13:03:31 -863.2 0.528 61.05

ADCP -3009 15:32:29 266.7 0.057 257.49

ADCP -3010 16:15:50 538.6 0.304 247.92




ADCP -3001 5:56:26 1173.4 0.626 243

ADCP -3003 6:33:46 1072.3 0.736 232.6

ADCP -3005 8:56:58 493.7 0.337 274.89

ADCP -3006 9:49:11 184.3 0.123 219.68

ADCP -3008 12:10:29 -1445 0.737 81.16

ADCP -3010 13:08:13 -1294.8 0.514 107.95

ADCP -3013 15:11:46 -227.8 0.059 114.4

ADCP -3014 18:20:44 1120.9 0.546 238.9

ADCP -3018 19:14:51 1038.8 0.544 232.96




ADCP-3001 6:16:08 899.753 0.589 219.54

ADCP-3003 7:20:24 634.78 0.401 219.17

ADCP-3005 9:58:11 -1526.63 0.794 79.75

ADCP-3006 10:31:05 -1863.2 0.932 84.6

ADCP-3008 11:53:24 -1623.06 0.467 101.68

ADCP-3011 12:32:24 -1008.76 0.326 102.15

ADCP-3012 14:09:40 -148.155 0.125 148.94

ADCP-3015 15:05:55 40.713 0.021 194.98

ADCP-3017 16:40:08 718.78 0.25 243.85

ADCP-3019 17:19:29 1105.575 0.46 227.79

ADCP-3020 18:31:29 1166.639 0.563 239.69

ADCP 3002 19:44:15 655.518 0.262 227.34




ADCP -3001 6:00:17 1236.085 0.651 220.02

ADCP -3003 6:50:06 956.487 0.506 230.54

ADCP -3006 8:42:28 614.855 0.577 212.37

ADCP -3009 9:22:34 530.008 0.278 236.62

ADCP -3011 10:41:01 -1340.72 0.675 77

ADCP -3012 11:22:31 -1949.85 0.891 80.44

ADCP -3015 12:59:54 -1515.17 0.328 96.75

ADCP -3017 13:43:02 -819.512 0.208 105.01

ADCP -3019 15:15:57 -89.469 0.066 46.18

ADCP -3022 17:10:38 556.953 0.222 247.26

ADCP -3025 18:40:41 1160.577 0.538 229.67




ADCP -4000 9:01:53 383.8 0.448 265.45

ADCP -4003 9:38:41 -565.2 0.38 68.79

ADCP -4004 12:43:27 -1467 0.521 51.1

ADCP -4007 15:57:15 525.5 0.268 252.43




ADCP -4000 6:08:58 1392.4 0.962 253.81

ADCP -4002 9:08:48 550.8 0.443 245.17

ADCP -4004 12:46:05 -1540.6 0.621 41.81

ADCP -4007 15:30:03 101.2 0.172 277.29

ADCP -4012 16:30:47 495.2 0.283 261.57

ADCP -4014 18:05:50 1201.8 0.678 246.82

ADCP -4015 18:51:51 1307.9 0.909 249.48




ADCP -4001 6:48:38 1159.693 1.013 246.44

ADCP -4003 10:16:57 -1475.96 0.946 48.84

ADCP -4004 12:10:12 -1348.31 0.494 44.27

ADCP -4006 14:32:28 44.441 0.025 172.41

ADCP -4009 16:59:24 1159.918 0.463 245.36

ADCP -4011 19:02:12 1500.706 0.933 247.92

ADCP -4013 19:25:01 1443.647 1.029 242.16




ADCP -4001 6:26:23 1519.237 0.867 249.6

ADCP -4003 9:01:01 684.674 0.783 233.41

ADCP -4004 10:56:09 -1881.08 1.027 60.44

ADCP -4006 13:20:31 -1346.94 0.444 48.04

ADCP -4008 15:29:29 -26.532 0.075 322.1

ADCP -4011 17:29:58 875.918 0.322 253.74

ADCP -4013 17:36:14 1015.189 0.397 255.79

ADCP -4014 18:07:33 1321.482 0.526 263.95

ADCP -4016 18:22:17 1393.932 0.658 257.05

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27/0

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177:

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0 AM

74.

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602.

4025

0.00

0.08

401.

0574

0.97

3438

99.3

292

27/0

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176:

58:0

0 AM

84.

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301.

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0.00

0.08

401.

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0.92

1036

89.1

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27/0

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0 PM

158.

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0.08

420.

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168.

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176:

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0 AM

235.

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380.

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IWM SEDIMENT LABORATORY Sieve Analysis of Bed Sample

Analysis Type: Dry Sieving Sample Number: 1Station: ADCP-1 Position [Easting] (m) : 750048River/Channel: Lower Badre Position [Northing] (m) : 2509787Collection Date: 15-May-17 Sample Weight before Sieving (g): 50.3840Collection Time: Sample Weight after Sieving (g): 50.3120

Sample Loss after Sieving (g): 0.072Sand(%) [> 63 µm] : 87.93Silt & Clay(%) [< 63 µm] : 12.07

Sieve Size Material Retained Material Retained Material Finer(mm) (g) (%) (%)4.000 0.0000 0.000 100.0002.000 0.0000 0.000 100.0001.000 0.0000 0.000 100.0000.500 0.0000 0.000 100.0000.250 1.2075 2.400 97.6000.125 7.3287 14.567 83.0330.063 35.7020 70.961 12.072Pan 6.0738 12.072 0.000

D10 D16 D35 D50(mm) (mm) (mm) (mm)

Out Of Range 0.065 0.079 0.091

D65 D84 D90 Geometric Standard(mm) (mm) (mm) Deviation0.105 0.131 0.174 1.420

0

20

40

60

80

100

0.010 0.100 1.000 10.000

Perc

ent F

iner

By

Wei

ght

Grain Diameter(mm)

��

��





D10 D16 D35 D50(mm) (mm) (mm) (mm)

Out Of Range 0.065 0.080 0.093


0

20

40

60

80

100

0.010 0.100 1.000 10.000

Perc

ent F

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By

Wei

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Grain Diameter(mm)

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D10 D16 D35 D50(mm) (mm) (mm) (mm)

Out Of Range 0.065 0.082 0.097


0

20

40

60

80

100

0.010 0.100 1.000 10.000

Perc

ent F

iner

By

Wei

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Grain Diameter(mm)

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IWM SEDIMENT LABORATORYDetermination of Grain Size Distribution

Analysis Type : Andreasens Tube & Wet Sieving

River: Lower Badre Bottol No: 4Station: ADCP-4 Sample Type : Bed SampleCollection Date: 15/05/2017 Position (m) (Easting) : 748075Collection Time: Position (m) (Northing) : 2506486

X-Section:

Temperature In ºC. Initial : 24.0 Factor, F: 0.01300Final :

Time Time (T) Height (H) SQRT. (H/T) Volume Filter Paper Filter Paper & Concentration Dia [D} (mm) Finer Adjusted Finer(min) (Initial) (ml) Wt.(g) Sample Wt.(g) (mg/l) [F*SQRT(H/T)] (%) (%)

8:00 0 102.0 100.0 0.0851 0.4029 3178.00 100.00 97.4068:01 1 100.0 10.000 100.0 0.0852 0.3675 2823.00 0.130 88.83 86.5258:03 3 98.0 5.715 100.0 0.0852 0.3462 2610.00 0.074 82.13 79.9978:07 7 96.0 3.703 100.0 0.0851 0.3410 2559.00 0.048 80.52 78.4338:15 15 94.0 2.503 100.0 0.0852 0.2672 1820.00 0.033 57.27 55.7838:30 30 92.0 1.751 100.0 0.0852 0.2178 1326.00 0.023 41.72 40.6429:00 60 90.0 1.225 100.0 0.0853 0.1804 951.00 0.016 29.92 29.14810:00 120 88.0 0.856 100.0 0.0851 0.1465 614.00 0.011 19.32 18.81912:00 240 86.0 0.599 100.0 0.0851 0.1333 482.00 0.008 15.17 14.77316:00 480 84.0 0.418 100.0 0.0852 0.1144 292.00 0.005 9.19 8.9508:00 1440 82.0 0.239 100.0 0.0852 0.0927 75.00 0.003 2.36 2.299

��

Sample Weight before Sieving (g): 50.0509Sample (>63µm) Weight after Sieving (g): 1.2984Sample (< 63µm) Weight after Sieving (g): 48.7525Sieve Size Weight Weight Cumulative Finer

(mm) Retained (g) Retained (%) Retained (%) (%)4.000 0.0000 0.0000 0.0000 100.00002.000 0.0000 0.0000 0.0000 100.00001.000 0.0000 0.0000 0.0000 100.00000.500 0.0000 0.0000 0.0000 100.00000.250 0.0000 0.0000 0.0000 100.00000.125 0.0000 0.0000 0.0000 100.00000.063 1.2984 2.5942 2.5942 97.4058Pan 0.0000 0.0000 2.5942 97.4058

��

Grain Diameter (mm) 4.000 2.000 1.000 0.500 0.250 0.125 0.063 0.048Percent Finer 100.00 100.00 100.00 100.00 100.00 100.00 97.41 78.43Grain Diameter (mm) 0.033 0.023 0.016 0.011 0.008 0.005 0.003Percent Finer 55.78 40.64 29.15 18.82 14.77 8.95 2.30

D10 D16 D35 D50 D65 D84 D90 Geometric Standard(mm) (mm) (mm) (mm) (mm) (mm) (mm) Deviation0.006 0.009 0.019 0.028 0.038 0.052 0.057 2.484

0

10

20

30

40

50

60

70

80

90

100

0.001 0.010 0.100 1.000 10.000

Perc

ent F

iner

By

Wei

ght

Grain Diameter (mm)

��

��

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Sec_1

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Emergency Survey of the Lower Bhadra River at Polder-29 Under Blue Gold Program

0 0.15 0.3 0.45 0.60.075Kilometers

¯Coordinate System: WGS 1984 UTM Zone 45NProjection: Transverse MercatorDatum: WGS 1984False Easting: 500,000.0000False Northing: 0.0000Central Meridian: 87.0000Scale Factor: 0.9996Latitude Of Origin: 0.0000Units: Meter

Client:Euroconsult Mott MacDonaldSurveyed By:Institute of Water Modelling

Duration of Survey:13.05.2017 to 17.05.2017

Float Tracking Map

(-8.0) to (-6.0)

(-6.0) to (-2.0)

(-2.0) to (0.0)(0.0) to (6.0)

............

(1st Phase: Receding Tide)

LegendFloat Track: 13-May

Float Track: 14-May

Bank Line

Runlines

Sec_1

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0 0.15 0.3 0.45 0.60.075Kilometers




Float Tracking Map

(-8.0) to (-6.0)

(-6.0) to (-2.0)

(-2.0) to (0.0)(0.0) to (6.0)

............

(1st Phase: Incoming Tide)


Float Track: 14-May

Bank Line

Runlines

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0 0.15 0.3 0.45 0.60.075Kilometers



Duration of Survey: 27.05.2017 to 28.05.2017

Float Tracking Map

(-8.0) to (-6.0)

(-6.0) to (-2.0)

(-2.0) to (0.0)(0.0) to (6.0)

............

(2nd Phase: Receding Tide)


Float Track: 28-May

Bank Line

Runlines

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0 0.15 0.3 0.45 0.60.075Kilometers




Float Tracking Map

(-8.0) to (-6.0)

(-6.0) to (-2.0)

(-2.0) to (0.0)(0.0) to (6.0)

............

(2nd Phase: Incoming Tide)


Float Track: 28-May

Bank Line

Runlines

��

��

Legend:B

ank LineB

athymetric Transect Line

Client: Euroconsult M

ott MacD

onald

AD

CP Transect Line

TBM

School

SSC/B

ed Material Sam

pling

Bazar(M

arket)B

Water Level Station

Legend:Legend:

Bank Line

Bathym

etric Transect LineA

DC

P Transect Line

TBM

School

SSC/B

ed Material Sam

pling

Bazar(M

arket)B

Graveyard

Proposed Spar

Mosque

Kheya G

hat

Water Level Station

Lege

nd:

Lege

nd:

Ban

k Li

neB

athy

met

ric T

rans

ect L

ine

AD

CP

Tran

sect

Lin

e

TBM

Scho

ol

SSC

/Bed

Mat

eria

l Sam

plin

g

Baz

ar(M

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Gra

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rd

Prop

osed

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Bor

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ater

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Dur

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Dur

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Clie

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Dur

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.201

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Clie

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Dur

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Clie

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Dur

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Dur

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Clie

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Dur

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Dur

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.201

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Dur

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n of

Sur

vey:

13.

05.2

017

to 1

7.05

.201

7

˘ˇ...dual frequency digital echo-sounder cv 200, coupled with trimble sps855 rtk gps using...

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