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highest rate of widrawl in the country per sq. km. But till now water samples from any of the tube well in Dhaka City does not have any arsenic contamination. Upazilas and part of Upazilas having water from all aquifers expected to be safe from arsenic contamination is listed below (Map enclosed). A. The areas covered by Barind Residual Deposits of the Pleistocene Age. A.1 Barind Residual Deposits cover an area of 7,680 sq. km of the central parts of Rajshahi Division. Twelve Upazilas of Bogra, Joypurhat, Naogaon, Nowabganj and Rajshahi Districts (Annex-2) are completely covered by Barind Residual Deposits. Aquifers below the Red Clay of these Upazilas are safe from Arsenic pollution. A.2. 32 Upazilas of Bogra, Dinajpur, Gaibandha, Joypurhat, Naogoan, Natore, Rangpur and Sirajganj Districts (Annex-3) partially belong to Barind Geological District of Residual Deposits. B. The areas covered by Madhupur Residual Deposits of the Pleistocene Age. B.1. Madhupur Residual Deposits cover an area of 4058 sq. km. 2 Upazilas of Mymensingh and Tangail Districts (Annex-4) are completely covered by Madhupur Clay deposits. Aquifers of these Upazilas are safe from arsenic contamination. B.2. 19 Upazilas of Comilla, Dhaka, Gazipur, Jamalpur, Mymensingh, Narayanganj, Narsingdi and Tangail Districts (Annex-5) are partly covered by Madhupur Clay deposits. Aquifers within the Madhupur Clay Deposits are still Arsenic safe. C. The South Eastern Hills Region: Area covered by Pre-Holocene Sediments in the Chittagong and Hill Tract Districts. C.1. All the Upazilas of Khagrachari, Rangamati, Bandarban, Cox’s Bazar, and Districts of South Eastern Hills Regions (Annex-6) belong to Bedrock Districts and are completely covered by Bedrock Deposits. C.2. Parts of 22 Upazilas of Chittagong, Sherpur, Habiganj, Maulivibazar, Sunamganj and Sylhet Districts (Annex-6) are situated within Bedrock Districts. . A-10 PDF created with FinePrint pdfFactory trial version http://www.fineprint.com
C E N O Z O I T E R T I A R Y N E O G E N E EXPOSED GEOLOGICAL SUCCESSION OF BANGLADESH Q u a t e r n a y A-11 Annex - 1 ERA PERIOD EPOCH GROUP FORMATION LITHOLOGY THICKNESS (in Meter) Holocene Alluvium Sand, Silt, clay, peat, Corals Highly (Up to 0.01 Ma*) Variable ......................... ....Unconformity...... .................................... ..................... Pleistocene (0.01 to Madhupur Clay Red & yellow clay with 1.8 Ma) ferruginous & calcareous nodules 32+ St. Martin's Shelly sandstone, limestone & Limestone coral clusters 1.7 ............................... .....Unconformity........ ........................................ ..................... Pliocene (1.8 Ma to Dihing Silty Sandstone, Claystone, 5.3 Ma) Sandstone containing abundant ferrugenous concretions, boulder bed, yellowish brown. 129 ....Unconformity..... .............................................. ....................... Dupi Tila Claystone, siltstone, sub - 1798 Claystone ordinate sandstone with ferruginous bands, gravels in ............................... places Late Miocene Dupi Tila Medium to coarse grained, gray (5.3 Ma to 11.2 Sandstone to yellow sandstone with clay 914 Ma ) balls and quartz pebbles, traces of coal lenses. ........... .....Unconformity.... ............................................... ...................... Girujan Clay Claystone, silty shale, and Middle Miocene subordinate sandstone. 1067 (11.2 Ma to 16.4 Tipam Tipam Sandstone Massive sandstone with Ma) subordinate shale 1203 ................ .......................... ................................................... .................... Boka Bil Alternation of well bedded slltstone and shale with subordinate sandstone 1710 Early Miocene Surma Upper Bhuban Siltstone with subordinate shale (16.4 Ma to 23.8 Ma) Middle Bhuban Lower Bhuban and sandstone Silty and sandy shale Sandstone and sandy shale 1953 928 980 * Million Years Ago ** Maximum Possible Thickness PDF created with FinePrint pdfFactory trial version http://www.fineprint.com
Page 1 and 2: Government of the People’s Republ
Page 3 and 4: Presentation of the Report Abbrevia
Page 5 and 6: A-44 ANNEX I MINISTRY OF LOCAL GOVE
Page 7 and 8: PDF created with FinePrint pdfFacto
Page 21 and 22: CONTENTS INTRODUCTION 1 GEOMORPHOLO
Page 23 and 24: The Flood plain and the Bengal Delt
Page 25 and 26: composed of alternating beds of san
Page 27: Lalmai Hills area is considered as
Page 31 and 32: Upzilas Partially Covered by Safe A
Page 33 and 34: A-15 Annex- 6 Upzilas Completely an
Page 35 and 36: Fig 2. Map showing the area of arse
Page 37 and 38: Table 4.2 Aquifer Types and Charact
Page 39 and 40: 1 2 3 4 5 Unit-21: Madhupur Transit
Page 41 and 42: Table 4.3 The Main Aquifers in Bang
Page 43 and 44: 19 Kushtia 709.85 2500 0.0072 0.252
Page 45 and 46: Table 4.11 Estimates of Flow and Ti
Page 47 and 48: Table 4.16 Approximate Wet Season R
Page 49 and 50: Table 5.3 Summary of Pre-Existing L
Page 51 and 52: Table 5.5 Arsenic Results of Repres
Page 53 and 54: Table 5.16 Arsenic Statistics for t
Page 55 and 56: Sl # DIVISION DISTRICT UPAZILA As C
Page 57 and 58: Sl # DIVISION DISTRICT UPAZILA As C
Page 59 and 60: Geological Survey of Bangladesh\ Ge
Page 61 and 62: Upazila: Akhaura, Brahmanbaria Sada
Page 63 and 64: Dumuria Upazila, Khulna District #
Page 65 and 66: information to write such a report.
Page 67 and 68: 2.1 Introduction CHAPTER II Physiog
Page 69 and 70: Fig. 2.2 Physiographic Map of Bangl
Page 71 and 72: 2.3.3 The Pleistocene Uplands cover
Page 73 and 74: winter when the volume of water pas
Page 75 and 76: country. The central part represent
Page 77 and 78: Fig. 3.2b. Schematic Crustal Cross
Page 79 and 80:
3.1.6 During the Pleistocene and Ho
Page 81 and 82:
Fig. 3.5 Lithologic Column Showing
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microfossils have been assigned Upp
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3.4 late Pleistocene-Holocene in Be
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marine and fresh water peat. After
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Organic matter from the uppermost p
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3.4.4 Proposed Divisions of the lat
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3.4.4.4 Late Pleistocene -Early Hol
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4.1 Introduction CHAPTER IV Aquifer
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Fig. 4.1 Groundwater Development Zo
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Fig. 4.3 Revised Hydro-geological M
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Quaternary. Due to neo-tectonic act
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4.7.2 The sediment from the surface
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4.10 Recharge of the aquifers 4.10.
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4.10.5 The regional hydraulic gradi
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Fig. 4.11 Geological Cross Section
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(centrifugal) pump. BADC defines th
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5.4.2 From 1993 different organizat
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5.4.6 NGO Forum and Grameen Bank ha
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These areas are as follows. 1. The
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5.6.3 BGS-DPHE (2001) shows that wa
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continually replenished with a resi
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5.7.2 Some test results of ground s
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CHAPTER VI CONCLUSIONS ♦ Arsenic
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The JICA report mentions that, "The
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working on ground water under one u
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sections of the sediments of the de
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♦ Soil arsenic analyses in the ar
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Bhattacharya, A. and Banerjee S.N,
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Ministry of Women and Children Affa
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Aquifer Systems of Bangladesh 4.1 I
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Fig. 4.3 Revised Hydro-geological M
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Table. 5.4 Summary of Regional Arse
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As Arsenic List of Abbreviations Us
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EXECUTIVE SUMMARY 1. Ministry of Lo
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9. The exact number of hand pumps u
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areas ground water can still play a
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