Floods in Bangladesh: A highland-lowland interaction?:
Saved in:
| Main Author: | |
|---|---|
| Format: | Book |
| Language: | English |
| Published: |
Berne
Univ., Inst. of Geography
1998
|
| Series: | [Geographica Bernensia / G]
48 |
| Subjects: | |
| Online Access: | Inhaltsverzeichnis |
| Item Description: | Zugl.: Bern, Univ., Diss., 1996 |
| Physical Description: | Getr. Zählung zahlr. graph. Darst., Kt. |
| ISBN: | 3906151093 |
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Record in the Search Index
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|---|---|
| adam_text | Titel: Floods in Bangladesh - a highland-lowland interaction?
Autor: Hofer, Thomas
Jahr: 1998
TABLE OF CONTENTS
PREFACE_viii
LIST OF FIGURES_ix
LIST OF TABLES_xi
GLOSSARY_xiii
SUMMARY_xiv
1. INTRODUCTION_1
1.1 Background and frame work of the study__ 1
1.2. Objectives of the Study_2
2. FLOODS IN BANGLADESH - A LITERATURE REVIEW_3
2.1. Bangladesh - basic features relevant for floods_3
2.2. Causes of flooding_8
2.3. Spatial and temporal differentiation of flooding_9
2.4. External versus internal contribution to flooding_ 11
2.5. History and frequency of flooding_ 12
2.6. Discussion_ 13
3. FLOODING CONDITIONS IN THE LOWLANDS OF THE GANGES, THE BRAHMAPUTRA AND
THEMEGHNA, 1953 TO 1990 _14
3.1. Overview _ 14
3.2. Flooding conditions in Uttar Pradesh, Bihar, West Bengal, Assam and Bangladesh: a comparison_ 19
3.3. Have floods increased since 1953?_ 19
3.4. Classification of flood dimension_ 20
3.5. Summary__ 21
4. DATA_23
4.1. Rainfall data _____ 23
4.1.1. General comments_23
4.1.2. Data sources_26
4.1.3. Data gaps_ _26
4.2. Discharge data_30
4.2.1. General comments___31
4.2.2. Data sources____32
4.3. Groundwater data____32
4.4. Summary__34
5. ANALYSIS OF MONTHLY RAINFALL IN THE GANGES-BRAHMAPUTRA-MEGHNA BASIN_35
5.1. Definition of subcatchments __35
5.2. Definition of inner-annual time periods_ 37
5.3. Analysis of monthly rainfall for each station__38
5.3.1. Methodology___38
5.3.2. Rainfall differentiation in the Ganges-Brahmaputra-Meghna basin___38
5.3.3. Discussion__41
5.4. Analysis of areal monthly rainfall for each subcatchment_ 41
5.4.1 Methodology_____41
5.4.2. Patterns of areal monthly rainfall in the Ganges-Brahmaputra-Meghna basin_44
5.4.3. Discussion____44
5.5. Calculation of rainfall volume for each subcatchment_45
5.5.1. The area of the 13 subcatchments •_45
5.5.2. Calculation of the rainfall volume __45
5.5.3. Patterns of rainfall volume in the Ganges-Brahmaputra-Meghna basin_46
5.5.4. Discussion__47
5.6. Possibilities and limitations of the analysis of monthly rainfall_47
6. ANALYSIS OF DISCHARGE DATA_49
6.1. Hydrological characteristics of the rivers in the Ganges-Brahmaputra-Meghna basin_49
6.1.1. Average monthly discharge______________49
6.1.2. Daily discharge__—.--—------51
6.2. Discharge anomalies in the Ganges-Brahmaputra-Meghna basin _52
6.2.1. The identification of monthly discharge anomalies ______-__________.—_-52
6.2.2. Regional differentiation of discharge anomalies___________.___53
6.3. Hydrological contribution of selected Himalayan tributaries to the main river system_54
6.4. Changes of discharge volumes of the major rivers on their way through the lowlands towards the Bay of
Bengal___— 57
6.5. Summary _____-—---- 59
7. POTENTIAL RUNOFF AND RELEVANCE FOR BANGLADESH: METHODOLOGY AND
AVERAGE CONDITIONS____-61
7.1. Potential runoff: R(pot) _____— ^
7.1.1. Theoretical background------61
7.1.2. The definition of the discharge factors for subcatchments 1,2,4 and 5 _-_______63
7.1.3. Correlation of the potential runoff for the Ganges catchment with the discharge of the Ganges at Farakka, 1950 to 1980-66
7.1.4. Discussion _______--------^7
7.1.5. The definition of the discharge factors for all the 13 subcatchments-----69
7.2. Relevance of the potential runoff for Bangladesh: R(relev)________ 70
7.2.1. Theoretical background_____70
7.2.2. Calculation of the distance from each subcatchment to the reference point in Bangladesh____73
7 .2.3. Calculation of the weighted distance from each subcatchment to the reference point in Bangladesh__73
7.2.4. Discussion____74
7.3. Average patterns of R(pot) and R(relev) in the 13 subchatchments of the Ganges-Brahmaputra-Meghna basin
_________75
7.4. Correlation of R(pot) of different subcatchments in the four monsoon months___79
7.4. Summary_______81
8. ANALYSIS OF CASE STUDIES____82
8.1. Introduction______ _82
8.2. The „flood year 1955____84
8.2.1. Existing knowledge______84
8.2.2. Analysis of the whole system taking into consideration potential runoff and relevance for Bangladesh__84
8.2.3. Monthly discharge____88
8.2.4. Daily rainfall and daily discharge__.____89
8.2.5. Summary____9®
8.3. The „flood year 1974___91
8.3.1. Existing knowledge_____92
8.3.2. Analysis of the entire system taking into consideration potential runoff and relevance for Bangladesh__92
8.3.3. Monthly discharge____95
8.3.4. Daily rainfall and daily discharge ___95
8.3.5. Groundwater_____99
8.3.6. Summary______101
8.4. The „flood year 1987__101
8.4.1. Existing knowledge ___ 101
8.4.2. Analysis of the entire system taking into consideration potential runoff and relevance for Bangladesh___ 04
8.4.3. Monthly discharge _______107
8.4.4. Daily rainfall in Bangladesh _______108
8.4.5. Daily discharge____________109
8.4.6. Daily rainfall outside Bangladesh_112
8.4.7. Groundwater_____116
8.4.8. Tidal effects_________116
8.4.9. Summary _______117
8.5. The „flood year 1988_ 118
8.5.1. Existing knowledge___119
8.5.2. Analysis of the entire system taking into consideration potential runoff and relevance for Bangladesh_120
8.5.3. Monthly discharge_124
8.5.4. Daily rainfall in Bangladesh _124
8.5.5. Daily rainfall outside Bangladesh_127
8.5.6. Daily discharge _127
8.5.7. Groundwater_132
8.5.8. Tidal effects_132
8.5.9. Summary_132
8.6. The „dry year 1978_ 133
8.6.1. Existing knowledge_133
8.6.2. Analysis of the entire system taking into consideration potential runoff and relevance for Bangladesh_134
8.6.3. Monthly discharge_137
8.6.4. Daily rainfall and daily discharge _140
8.6.5. Groundwater_140
8.6.6. Summary_140
8.7. The „dry year 1986_ 142
8.7.1. Existing knowledge_142
8.7.2. Analysis of the entire system taking into consideration potential runoff and relevance for Bangladesh_142
8.7.3. Monthly discharge_142
8.7.4. Daily rainfall and daily discharge _145
8.7.5. Groundwater_149
8.7.6. Summary_149
8.8. The „average year 1991 _ 149
8.8.1. Existing knowledge_149
8.8.2. Daily water level of selected stations on the Ganges and the Brahmaputra_152
8.8.3. Discussion_154
8.9. The „average year 1993 _ 155
8.9.1. Introduction_155
8.9.2. The impact of the extraordinary flood event in Nepal on the discharge characteristics of the Ganges at Hardinge Bridge_155
8.9.3. The hydroclimatological conditions in Bangladesh_157
8.9.4. Summary_159
9. SYNTHESIS_160
9.1. Steps carried out in the present study: a retrospect_ 160
9.2. Comparison of eight case studies_ 161
9.3. Floods in Bangladesh: six theses_ 162
9.4. Highland-lowland interactions: a question of scales_ 163
9.5. Challenges_ 164
REFERENCES_165
ANNEX 1
ANNEX 2
ANNEX 3
|
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| spelling | Hofer, Thomas Verfasser aut Floods in Bangladesh: A highland-lowland interaction? Thomas Hofer Berne Univ., Inst. of Geography 1998 Getr. Zählung zahlr. graph. Darst., Kt. txt rdacontent n rdamedia nc rdacarrier [Geographica Bernensia / G] 48 Zugl.: Bern, Univ., Diss., 1996 Geschichte 1955-1993 gnd rswk-swf Überschwemmung (DE-588)4186634-4 gnd rswk-swf Bangladesch (DE-588)4130903-0 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Bangladesch (DE-588)4130903-0 g Überschwemmung (DE-588)4186634-4 s Geschichte 1955-1993 z 1\p DE-604 G] [Geographica Bernensia 48 (DE-604)BV005876049 48 HBZ Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=008206243&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis 1\p cgwrk 20201028 DE-101 https://d-nb.info/provenance/plan#cgwrk |
| spellingShingle | Hofer, Thomas Floods in Bangladesh: A highland-lowland interaction? Überschwemmung (DE-588)4186634-4 gnd |
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| title | Floods in Bangladesh: A highland-lowland interaction? |
| title_auth | Floods in Bangladesh: A highland-lowland interaction? |
| title_exact_search | Floods in Bangladesh: A highland-lowland interaction? |
| title_full | Floods in Bangladesh: A highland-lowland interaction? Thomas Hofer |
| title_fullStr | Floods in Bangladesh: A highland-lowland interaction? Thomas Hofer |
| title_full_unstemmed | Floods in Bangladesh: A highland-lowland interaction? Thomas Hofer |
| title_short | Floods in Bangladesh: A highland-lowland interaction? |
| title_sort | floods in bangladesh a highland lowland interaction |
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