Technical support and implemented by: Infrastructure Suitability of Greater Dhaka City, Bangladesh ± ______________________________________________________ Issued by Geological Survey of Bangladesh, Director General 153 Pioneer Road, Segunbagicha, Dhaka-1000, Bangladesh Phone: +880-2-9343141, +880-2-9361066, Fax: +880-2-9339309 E-mail: [email protected], Web site: www.gsb.gov.bd Warning This general Geomorphic Map serves as a base for the Urban Geology Map for urban planning. Object planning and development needs further detail investigation. Geological Survey of Bangladesh A.T.M. Asaduzzaman, Nurun Nahar Faruqa, Mohammad Ashraful Kamal, Mohammad Abdul Aziz Patwary, Sultana Nasrin Nury, Sarwat Jabeen Authors GSB: Rolf R. Ludwig, Rebecca Bahls, Andreas Günther Authors BGR: Field Work Period: 1990 - 2013 Aerial Photographs (1952-58), Sattelllite Images (Rapid Eye, Landsat, SPOT), Survey of Bangladesh Topographic Sheet, 1:50 000 (1972 and 1979), Sub-surface Investigation Borehole Data Data Sources: % % % % % % % % % % % % % % % % % % % % % % % % % % % % % AERE Tongi Ashulia Rupganj Ruhitpur Hazratpur Mugrapara Aftabnagar Mirpur Stadium Pubail New Town Kanchpur Bridge Purbachal New Town RAJUK Jhilmil Project Gazipur City Corporation HSJI Airport National Monument 90°35'0"E 90°35'0"E 90°30'0"E 90°30'0"E 90°25'0"E 90°25'0"E 90°20'0"E 90°20'0"E 90°15'0"E 90°15'0"E 24°0'0"N 24°0'0"N 23°50'0"N 23°50'0"N 23°40'0"N 23°40'0"N 0 1 2 3 4 0,5 Kilometers RF: 1:75.000 Projection Information: WGS 1984 Projection False Easting False Northing Central Meridian Latitude of Origin Scale Factor Unit : Transverse Mercator : 500000.000000 : 0.000000 : 0° N : 90° E : 0.9996 : Metres Buriganga R Dhaleswari R. Meghna River Bangsi R. Balu R. Sitaklakhya River Islampur National University Old Airport Bangabandhu National Stadium Narayanganj City Corporation Fatullah Stadium Kaliganj Kaltapara Demra Version 1 July 2014 BPATC Bank Town Modhumonti Model Town Keraniganj River / Channel Major Roads % Landmarks Madhupur Terrace High, Madhupur Clay is exposed. Old Natural Levee 2-3 m thick, compacted sediments. Madhupur Terrace Low, Younger Natural Levee, Gully, Narrow Valley, High Floodplain Broad Valley, Channelbar, Pointbar Complex Low Floodplain, Marshy Land, Abandoned Channel, Oxbow Lake * Required to raise ground surface above the 100 years (±7.5 m AMSL) event flood level. Detailed subsoil investigation for deep pile foundation is essential, due to very low bearing capasity and high hazard potential. Shallow foundation is not prefered. 4 - 6 story light infrastructure is suitable in Madhupur Clay. Generel foundation depth is within 4 m, at places higher. Large and tall infrastructure requires pile foundation placed on Dupi Tila Sandstone. 4 - 6 story light infrastructure is suitable with a foundation depth of up to 3 m. Large and tall infrastructure requires pile foundation placed on Dupi Tila Sandstone. Commercial area, Residential area, Industrial zone Commercial area, Residential area, Industrial zone Industrial zone, Residential area, Commercial area, Agricultural zone, Park and Recreation Agricultural zone, Floodflow zone, Wetland, Rural settelment, Park and Recreation Agricultural zone, Floodflow zone, Wetland , Rural settelment, Park and Recreation Geomorphic Unit Infrastructure Suitability Very Good Moderate Poor Very Poor Good Madhupur Terrace Middle Sediments overlying the Madhupur Clay Flood Hazard Suggegsted landuse suitability Sediment thickness above Dupi Tila Formation [m] Infrastructure foundation suitability Suggegsted fill thickness* 12 - 20 8 - 12 10 - 15 4 - 6 story light infrastructure requires on-site subsoil investigation and proper foundation design. Deep pile foundation is needed for large and tall infrastructure. Detail subsoil investigation and proper foundation design is required for all types of infrastructure, due to low bearing capacity with hazard potential. Above 50-years flood level ± 1 m 7 - 11 Mainly silty clay, with alternate layers of organic clay and peat. Thikness is more than 10 m. In low floodplain areas less organic layers can be expected. Below annual flood level 5 - 6 m 20 - >50 5 - 7 m of loose and soft silty clay and clayey silt with few layers of organic clay; at places Madhupur Clay is missing. Below annual flood level 5 - 6 m Highly disected Madhupur Clay is exposed. Above 20-years flood level ± 2 m Moderate thickness (± 2 m) of soft sediments Above normal flood level 4 - 5 m
Welcome message from author
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Technical support and implemented by:
Infrastructure Suitability of Greater Dhaka City, Bangladesh
±
______________________________________________________Issued by Geological Survey of Bangladesh, Director General153 Pioneer Road, Segunbagicha, Dhaka-1000, BangladeshPhone: +880-2-9343141, +880-2-9361066, Fax: +880-2-9339309
E-mail: [email protected], Web site: www.gsb.gov.bd
Warning This general Geomorphic Map serves as a base for the Urban Geology Mapfor urban planning. Object planning and development needs further detail investigation.
Geological Survey of Bangladesh
A.T.M. Asaduzzaman, Nurun Nahar Faruqa, Mohammad Ashraful Kamal, Mohammad Abdul Aziz Patwary, Sultana Nasrin Nury, Sarwat Jabeen
Authors GSB:
Rolf R. Ludwig, Rebecca Bahls, Andreas GüntherAuthors BGR:
Field Work Period:1990 - 2013
Aerial Photographs (1952-58), Sattelllite Images (Rapid Eye, Landsat, SPOT),Survey of Bangladesh Topographic Sheet, 1:50 000 (1972 and 1979),Sub-surface Investigation Borehole Data
Data Sources:
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
AERE
Tongi
Ashulia
Rupganj
Ruhitpur
Hazratpur
Mugrapara
Aftabnagar
Mirpur Stadium
Pubail New Town
Kanchpur Bridge
Purbachal New Town
RAJUK Jhilmil Project
Gazipur City Corporation
HSJI Airport
National Monument
90°35'0"E
90°35'0"E
90°30'0"E
90°30'0"E
90°25'0"E
90°25'0"E
90°20'0"E
90°20'0"E
90°15'0"E
90°15'0"E
24°0
'0"N
24°0
'0"N
23°5
0'0"N
23°5
0'0"N
23°4
0'0"N
23°4
0'0"N
0 1 2 3 40,5
Kilometers
RF: 1:75.000
Projection Information:WGS 1984 Projection False EastingFalse NorthingCentral MeridianLatitude of OriginScale FactorUnit
: Transverse Mercator: 500000.000000: 0.000000: 0° N: 90° E: 0.9996: Metres
Buriganga R
Dhaleswari R.
Meghna River
Bangsi R.
Balu R.
Sitaklakhya River
Islampur
National University
Old Airport
BangabandhuNational Stadium
NarayanganjCity Corporation
Fatullah Stadium
Kaliganj
KaltaparaDemra
Version 1July 2014
BPATC
Bank Town
ModhumontiModel Town
Keraniganj
River / ChannelMajor Roads
% Landmarks
Madhupur Terrace High, Madhupur Clay is exposed.Old Natural Levee 2-3 m thick, compacted sediments.
Madhupur Terrace Low,Younger Natural Levee, Gully, Narrow Valley,High Floodplain Broad Valley, Channelbar, Pointbar ComplexLow Floodplain,Marshy Land, Abandoned Channel, Oxbow Lake
* Required to raise ground surface above the 100 years (±7.5 m AMSL) event flood level.
Detailed subsoil investigation for deep pile foundation is essential, due to very low bearing capasity and high hazard potential. Shallow foundation is not prefered.
4 - 6 story light infrastructure is suitable in Madhupur Clay. Generel foundation depth is within 4 m, at places higher. Large and tall infrastructure requires pile foundation placed on Dupi Tila Sandstone.
4 - 6 story light infrastructure is suitable with a foundation depth of up to 3 m. Large and tall infrastructure requires pile foundation placed on Dupi Tila Sandstone.
Commercial area, Residential area, Industrial zone Commercial area, Residential area, Industrial zone Industrial zone, Residential area, Commercial area, Agricultural zone, Park and Recreation
Agricultural zone, Floodflow zone, Wetland, Rural settelment, Park and Recreation
Agricultural zone, Floodflow zone, Wetland , Rural settelment, Park and Recreation
Geomorphic Unit Infrastructure Suitability
Very Good
Moderate
Poor
Very Poor
Good Madhupur Terrace Middle
Sediments overlying the Madhupur Clay Flood Hazard Suggegsted landuse suitabilitySediment thickness above Dupi Tila Formation [m]
Infrastructure foundation suitabilitySuggegsted fill thickness*
12 - 20
8 - 12
10 - 154 - 6 story light infrastructure requires on-site subsoil investigation and proper foundation design. Deep pile foundation is needed for large and tall infrastructure.
Detail subsoil investigation and proper foundation design is required for all types of infrastructure, due to low bearing capacity with hazard potential.
Above 50-years flood level ± 1 m 7 - 11
Mainly silty clay, with alternate layers of organic clay and peat. Thikness is more than 10 m. In low floodplain areas less organic layers can be expected.
Below annual flood level5 - 6 m20 - >50
5 - 7 m of loose and soft silty clay and clayey silt with few layers of organic clay; at places Madhupur Clay is missing.
Below annual flood level5 - 6 m
Highly disected Madhupur Clay is exposed. Above 20-years flood level ± 2 m
Moderate thickness (± 2 m) of soft sediments Above normal flood level 4 - 5 m
Related Documents
![[Waterworks] City Presentation - Dhaka(Bangladesh)](https://static.cupdf.com/doc/110x72/55862540d8b42a2b308b479e/waterworks-city-presentation-dhakabangladesh.jpg)
