g3-progress report by iwm

8/2/2019 G3-Progress Report by IWM

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G3: Water governance and community based management

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1. Introduction

The Ganges basin development challenge is increasing resilience of agricultural and

aquaculture systems in the Ganges delta focusing water and food security. There are five

projects namely G1, G2, G3, G4 and G5 having different objectives under Ganges Basin

Development Challenge (BDC) programme. The Project G3 is entitled Water governanceand community based management As one of the partners of G3 Institute of Water

modelling (IWM) has been entrusted to carry out the following activities to support

International Water Management Institute (IWMI); Preparation of baseline GIS maps,

inventory and condition of drainage sluices & structures, land inundation map with land type(F0,F1,F2, F3 .. ), participatory resource mapping, GIS map showing Mouza area, Mouza

population & Population density for 5 BWDB polders and 4 LGED subprojects.

This report contains progress of field survey and data collection work, data processing and

preparation project base maps and GIS maps for each polder of the study area of G3 and

inventory of structures.

2. Study area

The study area is in the coastal zone of Bangladesh. The southern part of the country

adjoining the Bay of Bengal is known as the coastal zone. In earlier decades when polders

were not constructed, low-lying areas of coastal zone were frequently flooded by salt water

during high tide and most of the area remained fallow and cropping intensity was very low,

livelihood opportunity was also poor because of less intensive economic activities. In order to

increase agricultural production by preventing the land of coastal area from frequent tidal

flooding and salinity intrusion the Coastal Embankment Project (CEP) was implemented in

accordance with the Master Plan adopted in 1964. Under this program Bangladesh Water

Development Board (BWDB) had built a series of polders enclosing the low-lying coastal

areas. Coastal polders are the first large scale human intervention in the coastal area. Over

the years it is learned that efficient water management involving active participation of local

community is a prerequisite for polder management in enhancing agriculture and aquaculture

production.

The study area of G3 is within the Ganges basin of the coastal zone of Bangladesh, which is,shown in Figure 2.1. The study area includes five BWDB polders namely P-3, P-31, P-30, P-

43/2f and P-24G and four LGED sub projects namely Bhagirabad-Jainkathi, Jabusha Beel,

Baganchra-Badurgacha, Latabunia.


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Fig 2.1: Study area map of G3


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3. Progress of work

3.1 Field survey and Data collection

3.1.a Summary of survey work

IWM has made a comprehensive field survey using state of the art survey technology to

collect quality information on infrastructure of the polders. The field survey work has been

started from 15 November, 2011 and substantial progress has been made. The field data

collection for four BWDB polders (3, 30, 31, 42/2f) and four LGED subprojects (Bhagirabad-

Jainkathi, Jabusha Beel, Baganchra-Badurgacha, Latabunia) has been completed. The

summary of the activities carried out for data collection campaign is shown in Table-3.1

Table-3.1: Summary of survey activity

3.1.b Survey methodology

The inventory surveys of existing structures are conducted for the Polder 3, 30, 31, 24G,

43/2F and 4 LGED subprojects. For the structure inventory the main features survey are

location (GPS & also village name), type of structure (Pipe, regulator, Box culvert), no of

vent, size of vent or dia, silt level, sofit level, deck level, Fall board/flap gate, active/inactive,

condition (good, minor problem, major problem), interviewing of the local people if it is

Sl.No. Events Specification Location Progress of work Remarks

1.Inventories of

regulator

Location, no. of vents,

vent Size, silt & soffitlevel, type of Structures,

Active/ Inactive, Fall

board/Flap Gate

Picture

Polder 3, 30, 31,24G, 43/2F and 4

LGED subprojects

All data collection

except 50% work of24G which will be

completed by25th

March-2012

RTK GPS and Levelmachines are used for

this survey

2.

Inventories of

Unauthorized

Structures

Location

Type

Size / Pipe Diameter

So So So

3.

Alignment of

Khal

All the existing drainage

khal along with name

All the planned

polders and LGEDsubprojects Completed

Conducted by hand

GPS and by usingexisting google image

4.Alignment of

Embankment

Surrounding the polders

mentioning the existing

condition

All the planned

polders and LGED

subprojects

All data collectionexcept 50% work of

24G which will be

completed

Hand GPS

5.

Location of

important

features like

educational

institution,

religious

Institution,

ImportantOffice, Hat-

bazar etc

Geographical coordinates

of the feature

Inside all the

polders and

subprojects

All data collection

except 50% work of

24G which will be

completed soon

Hand GPS


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adequate or not. RTK GPS has been used to establish the reduced level on the deck level of

the each structure with respect to IWM existing nearest BM/TBM values. Then the another

team measure the silt level, soffit level, structure dimension by using level machine and tape

and made interview of the local people for necessary information. During this data collection,

inventory of the unauthorized structures constructed by the people for the own purpose alsoconducted. The alignment survey of embankment, Khals and roads and the Geographical

coordinates of the feature in the polders and subprojects have been taken with Hand GPS.

Picture: IWM engineer working with RTK GPS to establish the reduced level


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3.2 Data processing and preparation of GIS map

Real-Time Kinematic Differential Global Positioning System (RTK-DGPS) technology with

computer based data storage and processing facility have been used in map production under

GIS environment. Field data has been collected using WGS84 datum and then the data has

been transferred into local datum Everest1830 and finally the data has been projected in BTMprojection system as convenient for Bangladesh. It can be mentioned that data for all physical

features have been collected as point location having coordinates (Latitude and longitude) of

the features. When the data have been projected the corresponding latitude and longitude

values have been converted as northing and easting. The northing and easting values of each

feature have been stored in excel file and from the excel file the shapefile of respective

feature has been created.

Using the available shapefile the final map has been prepared. It can also be mentioned that

besides the field survey data, IWM archive has also been used. For example, Shapefile of

road and river has been used form IWM archive and homestead boundary has been drawn

from IWM achieved imagery. Both field data and archived data have been cross-checked to

each other for better accuracy. In the map several types of physical features have been shown

such as Water Structure (made by BWDB, LGED and Public), Roads, Khal, River and other

features like Bridge/Culvert, Office, Religious Institution, Educational Institution, Bazar etc.

The maps also contain Union and Upazila Boundary. Wherever exists, District Headquarter,

Upazila Headquarter and Union Complex has been shown in the Map. Each feature in the

map has been shown with appropriate LEGEND. All the maps have been prepared leaving .5

inch boarder in left, right and lower side and .75 inch in upper side for good visual

representation. An index map has also been used to locate the study area with respect toBangladesh. Main concern of the map is to illustrate exact location of various types of

structures. In the study area, three types of structures are found. These are BWDB structures,

LGED structures and Public Structures (Structures made by local people are herein called

Public structures). Public structures mainly include pipes and small gates. These three types

of structure have been shown with three different LEGENDS. Because of paramount

importance, structure information has also been presented in a shorter tabular form in the

Map and detailed structure information has been provided in separate spreadsheet. In that

case serial number has been maintained both in LEGEND and in table. Other physical

features in the map have been classified into five broad categories namely educationalinstitution, religious Institution, Important Office, Bazar, Bridge/Culvert and other features.

Moreover, each feature has been labeled with their name to know exactly what the feature is.

A sample of baseline GIS map has been shown in Fig 3.2 and a sample of detailed structure

information has been given in Table 3.2 and 3.3. Some pictures of a BWDB structures of

Polde-30 is shown in fig 3.3


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Fig 3.2: Baseline GIS map of Polder-30


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Table 3.2: Sample of detailed BWDB structure information for Polder-30

Sl no. Structure name Khal name Village Union Easting NorthingVent

nos

Vent

width

Height

(m)

Pipe dia

(m)Gate type

Length

Barrel (m)

Sill

Level

Sofit

levelCondition

Active/

Inactive

1 P er B atiaghata Sluice gate P er B atiaghata K hal Per Bati aghata Gangarampur 445167 514210 0.75 Lift Gate 4.80 -0. 13 0.89 Good Ac ti ve

2 P er Bat ia gha ta Regulat or Bat ia gha ta Khal P er Batiaghat a Ga ngaramp ur 4 45 68 6 5 13 41 0 2 1 .5 0 1.80 0 .0 0 L if t G at e 5 .0 0 - 1.37 0 .4 3 G ood Active

3 Aushkhali Regulator Kalar Khal Aushkhali Gangarampur 445862 511587 1 1.50 1.80 0.00 Lift Gate 5.00 -0.85 0.95 Good Active

4 Titokhali Sluicegate No khal Titokhali Gangarampur 446396 509982 1 0.90 0 .90 0.00 Flap Gate 18.00 -0.19 0.71 no gate Active

5 Kholishabunia Re gul ator Kol atola khal Kholshibunia Gangarampur 446530 508654 2 1.50 1. 80 0.00 Lift Gate 4.80 -0. 76 1.05 Good Ac ti ve

6 Sukdara Sluice No khal Sukdara Surkhali 447121 506929 0.50 Fall Board 13.00 1.32 1.82 Good Active

7 Sukdara Sluice No khal Sukdara Surkhali 447885 506522 1 0 .90 0.80 0 .00 Fall Board 13.00 0.03 0.83 Good Active

8 Amtola Re gul ator Amtola khal Gondamari Gangarampur 448292 505857 2 1.50 1. 80 0.00 Lift Gate 4.00 -0. 75 1.05d/s silted, gate broken,

ironcap brokenActive

9 K ashidanga Sluice Kashidanga sluice Kashidanga Gangarampur 448844 504755 0.45 F all Board 13.00 0.98 1.43 no fall board Active

10 Kaimkhola Hula Slui ce No khal Kai mkhol a hula Gangarampur 4 49452 503210 0.55 Fall Boar d 13.00 0.94 1.49 no nee d, no board Inactive

11 Mosherdanga Regulator Mosherdanga khal Mosherdanga Gangarampur 449930 502988 1 1.80 1.50 0.00 Lif t Gate 4.00 -0.84 0.96 good, iron cap broken Act ive

1 2 Barun pa ra Sluice Barun pa ra kh al Barunpa ra Ga ngaramp ur 4 51 05 9 5 03 41 7 1 0 .0 0 0.00 0 .9 0 L if t G at e 1 6.00 - 0.05 0 .0 8 goo d, n o wheel Active

13 Gopalpur Sluice Gopalpur khal Gopalpur Gangarampur 451663 505162 1 0.80 1.15 0.00 Flap Gate 7.30 0.46 1.61 no gate Active

1 4 Ka tiang la S lu ice Kat ia ng la k ha l ka tian gla Ga ngaramp ur 4 51 92 2 5 06 46 8 1 1 .5 0 1.20 0 .0 0 L if t G at e 4 .0 0 0 .0 8 1 .28 goo d, i ro n cap brok en Active

1 5 Kh ej ur to la S luice Khe jur to la d oa ni Khe ju rt ola Ga ngaramp ur 4 51 82 1 50 787 9 1 0 .9 0 1.10 0 .0 0 Flap G at e 1 8.00 - 0.31 0 .79 b ar re l da mm age Inactive

16 Andaria Re gul ator Khoria nodi Andar ia Gangarampur 451855 508887 2 1.50 1. 80 0.00 Lift Gate 3.70 -0. 49 1.31 ir on cap broke n Ac ti ve

17 Gagramary Sluice No khal Gagramary Gangarampur 451950 509412 1 0.90 0 .95 0.00 F lap Gate 14.00 0.97 1.92 no gate Active

18 Fultola mot Sluice No khal Fultola Batiaghata 451638 511173 1 0.90 0.95 0.00 Flap Gate 15.00 -0.05 0.99 good Active

1 9 K is mot F ul to la Regulat or Bat ia gha ta Khal K is mo t fu lt ola Bat ia gha ta 4 51 01 5 51 283 4 1 1 .5 0 1.20 0 .0 0 L if t G at e 4 .3 0 - 0.32 0 .8 8 rai ling b ro ken Active

20 K ismot Ful tol a Sluice No khal Kismot fultol a Batiaghata 450895 5 13117 1 0.60 0. 90 0.00 Fall Boar d 14.00 1.23 2.13 d/s silte d, g ood Ac ti ve

21 Shoilmary Bheeler Khal Shoilmary Batiaghata 446199 516295 1 1.07 1.22 0.00 Lift Gate 5.00 -0.32 0.90 good Active

22 Shoilmary Kata khal Shoilmary Batiaghata 446878 517738 1 0 .90 1.22 0 .00 Flap Gate 7.30 -0.22 1.00 good Active

23 Khalishabunia Thakuntole Khal Khalishabunia Batiaghata 445780 515561 1 1.50 1 .80 0.00 Lift Gate 7.70 -0.59 1.24 good Active

2 4 Cha k Sh oi lm ary C ha k Sh oi lm ary Ch ak S ho ilma ry Bat ia gha ta 4 47 28 0 5 17 75 2 1 0 .9 0 1.10 0 .0 0 Fa ll Board 1 6.00 0 .0 0 0 .00u/s and d/s silted,barrel

damageInactive

25 Hogl abunia Sluice gate Hogl abuni a khal Hoglabunia Batiaghata 449704 515434 2 1.50 1. 80 0.00 Lift Gate 4.65 -0. 52 1.28 good Ac ti ve

26 Hatbati Sluicegate Hatbati khal Hatbati Batiaghata 450517 514985 0.95 Fall Board 15.00 -0.31 0.65 no gate Active

27Hoglabunia Moddhopara

SluicegateBalar khal Hoglabunia Batiaghata 449430 516277 0.75 Lift Gate 15.00 -0.04 0.71 good, c/s siltation Active

2 8 Ut tar Ho glabun ia S luice No k ha l Utt ar H og lab unia Bat ia gha ta 4 48 12 6 51 744 5 1 0 .9 0 1.10 0 .0 0 Fa ll Board 1 5.40 - 0.63 0 .4 5 good , n o gat e Active


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Table 3.3: Sample of detailed unofficial structure information for Polder-30

Sl no. Structure Type Location Union Easting Northing Pipe nosPipe dia

(m)Made by

1 Pipe Fultola Batiaghata 451465 511893 1 0.10 Public

2 Pipe Fultola Batiaghata 451530 511597 1 0.10 Public

3 Pipe Sholua Gangerampura 446513 509340 1 0.10 Public

4 Pipe Titokhali Gangerampura 446182 510176 1 0.10 Public

5 Pipe Malimara Batiaghata 445700 512598 1 0.15 Public

Fig 3.3: Picture of the structures in Polder-30

Upper right: Andaria Regulator

Upper left: Katiangla Sluice

Lower right: Kaimkhola Hula Sluice

Lower left: Sukdara Sluice


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3.3 Preparation of GIS map showing Mouza data

The Mouza data (shape files) for all the Polders and Subprojects has already been collected

form LGED and found some mismatch in the data. With discussion with LGED it is now

being corrected. After correction this Mouza map will be superimposed to the baseline GIS

map. The Mouza map will have the information of Mouza area, Mouza population &Population density.

3.4 Drainage modelling and preparation of inundation map

The regional model for the coastal area has been updated based on available data. The

calibrated and validated drainage model for the existing system will be applied to assess the

existing drainage performance of the present drainage networks in the selected polders and

sub projects. The drainage model will be developed using two separate module of MIKE 11

modelling system; rainfall-runoff modelling (hydrological modelling, MIKE11-NAM) and

hydrodynamic modelling (MIKE11-HD). MIKE-GIS module will also be used for

inundation and depth duration mapping. The existing calibrated and validated Southwest

Regional Model will be the basis to develop the drainage model for the proposed study

incorporating the detail catchments distribution of the river systems, up-dated river cross-

section data and existing regulators in the study area. Drainage models will be developed for

five BWDB polders namely P-3, P-31, P-30, P-43/2f and P-24G and four LGED sub projects

namely Bhagirabad-Jainkathi, Jabusha Beel, Baganchra-Badurgacha, Latabunia.

3.5 Participatory resource mapping

The participatory mapping for the selected polders and subprojects will be started after

finishing the baseline map. Participatory mapping for drainage problems, cropping pattern

and land use map for Kharif-I, Kharif-II and Rabi/Boro for the year 2010-2011 has already

been started. The drainage subsystem delineation will be done consulting with the local

people. In polder 3, there are some locations where conflicts between farmers and fishermen

are present due to rice and shrimp cultivation. These conflict spots will be located by

discussing with the local people and then will be updated in the GIS map. The work plan of

participatory resource mapping is given in Table 3.4.


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Table 3.4:Work Plan for Participatory Resource Mapping

Activities Date (17/3/2012-11/5/2012)

18/3-19/3 20/3-22/3 24/3-29/3 31/3-5/4 7/4-12/4 14/4-19/4 21/4-27/4 28/4-3/5 6/5-14/5 15/5-18/5

Team mobilization (2 teams, 4 persons) Team No. 1 & 2

Training (2 teams, 4 persons) Team No. 1 & 2

Development of inundation Maps

Latabunia, Baganchra-Badurgacha FCD,Jabusa Beel FCD

Jainkati-Bhagirabad FCD Subprojects and Polder-31, Polder-30, (Team-1)

Polder 3 (Team-2)

Assessment of condition of internal canals in a participatory way

Latabunia, Baganchra-Badurgacha FCD,Jabusa Beel, Polder-31,

Polder-30,Jainkati (Team-1)

Polder 3 (Team-2)

Development of cropping pattern for the year of 2010-2011

Latabunia, Baganchra-Badurgacha FCD,Jabusa Beel, Polder-31,Polder-30,Jainkati (Team-1)

Polder 3 (Team-2)

Delineation of drainage sub-system in the maps Latabunia,Baganchra-Badurgacha FCD,Jabusa Beel, Polder-31, Polder-

30,Jainkati (Team-1)

Polder 3 (Team-2)

Development of Maps showing conflict hot spots Latabunia,

Baganchra-Badurgacha FCD,Jabusa Beel, Polder-31, Polder-

30,Jainkati (Team-1)

Polder 3 (Team-2)


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Activities Date (17/3/2012-11/5/2012)

18/3-19/3 20/3-22/3 24/3-29/3 31/3-5/4 7/4-12/4 14/4-19/4 21/4-27/4 28/4-3/5 6/5-14/5 15/5-18/5

Historical development of a particular area Latabunia,

Latabunia, Baganchra-Badurgacha FCD,Jabusa Beel, Polder-31,Polder-30,Jainkati (Team-1)

Polder 3 (Team-2)

Development of inundation Maps

Assessment of condition of internal canals in a participatory way

Development of cropping pattern for the year of 2010-2011

Delineation of drainage sub-system in the maps

Development of Maps showing conflict hot spots

Historical development of a particular area

Polder 43_2F (Team-1)

Polder 24 (WMA G (Team-2)

Data Check and Compilation

Submit to IWM for GIS Map preparation


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3.6 Review of policies and practices for coastal zone management

Two extensive review reports 1)BWDB Initiatives Experiences towards Participatory Water

Resources Management and 2) Review of Policies in Water Sector and Related Sectors

that relate to Coastal Zone Management have been prepared and submitted.

BWDB Initiatives Experiences towards Participatory Water Resources Management

analyzed and describes the chronological development of participatory water resource

management practice under BWDB since 1972. The report also evaluated how the

experiences and lesson learned were internalized within BWDB and the Government policy.

Review of Policies in Water Sector and Related Sectors tha t relate to Coastal Zone

Management reviewed the existing water sector policies and those of the related sectors that

relate to Coastal Zone Management. The report reviewed as many as 18 policies and

analyzed and outlined their relevancy to the Coastal Zone Management.

g3-progress report by iwm

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