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Geological Setting of the Areas of Arsenic Safe Aquifers October, 2001 Md. Munir Hussain 1 and S. K. M. Abdullah 2 1. Hydrogeologist, BAMWSP & Member Secretary, GWTF 2. Former Director General, Geological Survey of Bangladesh and Chairman, Groundwater Task Force PDF created with FinePrint pdfFactory trial version http://www.fineprint.com A-2
CONTENTS INTRODUCTION 1 GEOMORPHOLOGY OF BANGLADESH 1 ARSENIC SAFE GEO-DISTRICTS 2 The Eastern and Northern Hills Regions 3 Chittagong and Hill Tract Districts 3 Hill ranges of Northeastern Sylhet District Hills Along the Narrow Frontier Strip of Sylhet and Mymensingh Districts 4 The Pleistocene Terrace or The Pleistocene Uplands 4 The Barind Tract 4 The Madhupur Tract 5 The Lalmai Hills 5 IMPACTS OF SEA LEVEL CHANGES ON THE AQUIFERS 6 WATER QUALITY OF SAFE AQUIFERS 6 The areas covered by Barind Residual Deposits of the Pleistocene Age 7 The areas covered by Madhupur Residual Deposits of the Pleistocene Age 7 The South Eastern Hills Region: Area covered by Pre-Holocene Sediments in the Chittagong and Hill Tract Districts 7 LIST OF TABLES Annex 1. Exposed Geological Succession of Bangladesh 8 Annex 2. Upzilas Completely Covered by Safe Aquifers in Barind Region 9 Annex 3. Upzilas Partially Covered by Safe Aquifers in Barind Region 10 Annex 4. Upzilas Completely Covered by Safe Aquifers in Madhupur Region 11 Annex 5. Upzilas Partially Covered by Safe Aquifers in Madhupur Region 11 Annex 6. Upzilas Completely and Partially Covered by Bed Rock and with Safe Aquifers in Hills Region 12 LIST OF FIGURES Figure 1. Contour Map of Bangladesh 13 Figure 2. Map Showing Area of Arsenic Safe Aquifers 14 PDF created with FinePrint pdfFactory trial version http://www.fineprint.com A-3
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 19: PDF created with FinePrint pdfFacto
Page 23 and 24: The Flood plain and the Bengal Delt
Page 25 and 26: composed of alternating beds of san
Page 27 and 28: Lalmai Hills area is considered as
Page 29 and 30: C E N O Z O I T E R T I A R Y N E O
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
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2.3.3 The Pleistocene Uplands cover
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winter when the volume of water pas
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country. The central part represent
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Fig. 3.2b. Schematic Crustal Cross
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3.1.6 During the Pleistocene and Ho
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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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