Investigation on sediment transport characteristics and impacts of human activities on morphological processes of Ethiopian rivers: case study of Kulfo river, Southern Ethiopia = Untersuchungen des Sedimenttransports und der Einflüsse menschlicher Aktivitäten auf die morphologischen Prozesse äthiopischer Flüsse
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Abschlussarbeit Buch |
| Sprache: | English |
| Veröffentlicht: |
Dresden
Inst. für Wasserbau und Techn. Hydromechanik
2005
|
| Schriftenreihe: | Dresdner wasserbauliche Mitteilungen
30 |
| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | 227 S. Ill., graph. Darst., Kt. |
| ISBN: | 386005483x |
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| 246 | 1 | 1 | |a Untersuchungen des Sedimenttransports und der Einflüsse menschlicher Aktivitäten auf die morphologischen Prozesse äthiopischer Flüsse |
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Datensatz im Suchindex
| _version_ | 1820867341781565440 |
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| adam_text |
TECHNISCHE UNIVERSITAT DRESDEN FAKULTAT BAUINGENIEURWESEN INSTITUT FUR
WASSERBAU UND TECHNISCHE HYDROMECHANIK DRESDNER WASSERBAULICHE
MITTEILUNGEN, HEFT 30 NIGUSSIE TEKLIE GIRMA INVESTIGATION ON SEDIMENT
TRANSPORT CHARACTERISTICS AND IMPACTS OF HUMAN ACTIVITIES ON
MORPHOLOGICAL PROCESSES OF ETHIOPIAN RIVERS: CASE STUDY OF KULFO RIVER,
SOUTHERN ETHIOPIA UNTERSUCHUNG DES SEDIMENTTRANSPORTS UND DER EINFLIISSE
MENSCHLICHER AKTIVITATEN AUF DIE MORPHOLOGISCHEN PROZESSE ATHIOPISCHER
FLLISSE: EINE FALLSTUDIE AM FLUSS KULFO, SUDATHIOPIEN DER TITEL UND DER
INHALT DIESES HEFTES ENTSPRECHEN DER ZUR ERIANGUNG DES AKADEMISCHEN
GRADES DOKTOR-LNGENIEUR (DR.-LNG.) AN DER FAKULTAT BAUINGENIEURWESEN DER
TECHNISCHEN UNIVERSITAT DRESDEN EINGEREICHTEN UND GENEHMIGTEN
DISSERTATION VON M.SC. NIGUSSIE TEKLIE GIRMA. RIGOROSUM UND
VERTEIDIGUNG: 07.03.2005 VORSITZENDER DER PROMOTIONSKOMMISSION: UNIV.
PROF. DR.-LNG. HABIL. P. RUGE TU DRESDEN GUTACHTER: UNIV. PROF. DR.-LNG.
HABIL. H.-B. HORLACHER TU DRESDEN UNIV. PROF. DR.-LNG. HABIL. H. MARTIN
TU DRESDEN PROF. DR.-LNG. J. JENSEN UNIVERSITAT SIEGEN ULB DARMSTADT
ILLLLLLLLLLLL 16115380 CONTENTS ABSTRACT 3 ACKNOWLEDGEMENTS 4 CONTENTS 5
LIST OF TABLES 9 LIST OF FIGURES 11 LIST OF APPENDICES 15 LIST OF
ABBREVIATIONS AND SYMBOLS 16 1. INTRODUCTION 19 1.1. PROBLEM STATEMENT
19 1.2. STATEMENT OF OBJECTIVES 20 1.3. METHODOLOGY AND ORGANIZATION OF
THE THESIS 21 2. GENERAL PHYSIOGRAPHIC AND WATER RESOURCES
CHARACTERISTICS 23 2.1. GENERAL PHYSIOGRAPHIC AND WATER RESOURCES
CHARACTERISTICS OF ETHIOPIA 23 2.1.1. GENERAL 23 2.1.2. TOPOGRAPHY AND
DRAINAGE 23 2.1.3. CLIMATE 24 2.1.4. WATER RESOURCES POTENTIAL AND ITS
DISTRIBUTION 25 2.1.5. WATER RESOURCES UTILIZATION 26 2.2. GENERAL
DESCRIPTION OF THE STUDY AREA 26 2.2.1. LOCATION AND TOPOGRAPHY OF KULFO
RIVER 26 2.2.2. GEOLOGY, VEGETATION AND LAND USE 28 2.2.3. CLIMATIC,
HYDROLOGIC AND SEDIMENT CHARACTERISTICS AND RECORDS 29 3. LITERATURE
REVIEW 30 3.1. BACKGROUND 30 3.2. DIFFERENCES AND SIMILARITIES BETWEEN
SAND- AND GRAVEL-BED RIVERS 31 3.3. TYPES OF BEDFORMS AND STABILITY OF
GRAVEL-BED RIVERS 34 3.4. CHARACTERISTICS OF SURFACES OF GRAVEL-BED
RIVERS 35 3.5. CHANNEL ROUGHNESS IN ALLUVIAL RIVERS 36 3.5.1.
RELATIONSHIPS OF BED ROUGHNESS COEFFICIENTS 37 INVESTIGATION ON SEDIMENT
TRANSPORT CHARACTERISTICS AND IMPACTS OF HUMAN ACTIVITIES ON
MORPHOLOGICAL PROCESSES OF ETHIOPIAN RIVERS: CASE STUDY OF KULFO RIVER.
SOUTHERN ETHIOPIA 3.5.2. CHANNEL ROUGHNESS AND RESISTANCE TO FLOW IN
GRAVEL-BED RIVERS 38 3.6. INITIATION OF SEDIMENT MOTION 39 3.7. SEDIMENT
TRANSPORT THEORIES 41 3.7.1. GENERAL 41 3.7.2. SEDIMENT TRANSPORT
PROCESSES IN RIVERS WITH NONUNIFORM BED MATERIALS 43 3.7.3. BED LOAD
TRANSPORT PROCESSES IN GRAVEL-BED RIVERS 44 3.7.4. BED LOAD TRANSPORT
FORMULAS FOR GRAVEL-BED RIVERS 47 3.7.4.1 SCHOKLITSCH EQUATION 47
3.7.4.2 MEYER-PETER AND MUELLER FORMULA 48 3.7.4.3 SMART'S EQUATION
(1984) 49 3.7.4.4 BAGNOLD'S STREAM POWER METHOD 50 3.7.4.5 PARKER, ET AL
(1982) FORMULA 50 3.7.4.6 EINSTEIN'S BED-LOAD EQUATION 51 3.7.5.
SUSPENDED SEDIMENT TRANSPORT IN RIVERS 53 3.7.5.1. VARIATION OF
SUSPENDED SEDIMENT CONCENTRATION AT A SECTION 54 3.7.5.2. HYSTERESIS
EFFECTS IN SUSPENDED SEDIMENT CONCENTRATION 55 3.7.6. SUSP'ENDED
SEDIMENT DISCHARGE FORMULAS 56 3.7.6.1. LANE AND KALINSKE (1941) METHOD
56 3.7.6.2. BAGNOLD'S STREAM-POWER METHOD 56 3.7.6.3. CHANG, SIMONS, AND
RICHARDSON'S (1965) APPROACH (CITED IN YANG, 1996; SIMONS AND SENTURK,
1992) 57 3.7.7. TOTAL SEDIMENT DISCHARGE FORMULAS 58 3.7.7.1. BAGNOLD'S
METHOD 59 3.7.7.2. YANG'S UNIT STREAM POWER EQUATION (1972) 59 3.7.7.3.
ENGELUND AND HANSEN'S EQUATION (1967) (IN YANG, 1987) 60 3.7.7.4. ACKERS
AND WHITE'S EQUATION (1973) 61 4. CHANNEL SURVEY AND RIVERBED MATERIAL
SAMPLING AND ANALYSIS 62 4.1. CHANNEL SURVEY 62 4.2. LONGITUDINAL
PROFILE AND CROSS SECTION GEOMETRIES 63 4.3. RIVERBED MATERIAL SAMPLING
AND ANALYSIS 65 4.4. METHODS OF SURFACE MATERIAL SAMPLING AND ANALYSIS
66 4.4.1. GRID METHOD OF SURFACE MATERIAL SAMPLING 67 4.4.2. GRAIN SIZE
DISTRIBUTION OF SURFACE MATERIAL 68 4.5. SUBSURFACE BED MATERIAL
SAMPLING AND ANALYSIS 71 4.5.1. SIEVE METHOD OF GRAIN SIZE ANALYSIS 72
4.5.2. HYDROMETER METHOD OF GRAIN SIZE ANALYSIS 73 4.5.3. COMPUTATION OF
PARTICLE DISTRIBUTION PARAMETERS 75 4.6. COMPARISON OF SURFACE AND
SUBSURFACE SIZE DISTRIBUTIONS, AND MATERIALS SAMPLED UNDER WATER 78 5.
WATER DISCHARGE AND SEDIMENT TRANSPORT MEASUREMENT AND ANALYSIS 81 5.1.
INTRODUCTION 81 5.2. METHOD OF WATER DISCHARGE MEASUREMENT 82 5.3.
EFFECTIVE (CHANNEL-FORMING) DISCHARGE 86 5.3.1. DETERMINATION OF THE
FLOW-FREQUENCY 87 5.3.2. CONSTRUCTION OF BED MATERIAL LOAD RATING CURVE
88 5.3.3. DETERMINATION OF EFFECTIVE DISCHARGE 88 5.4. BED LOAD
TRANSPORT MEASUREMENTS 90 5.4.1. INSTRUMENTATION AND DETERMINATION OF
RATE OF BED LOAD TRANSPORT 91 5.4.2. GRAIN SIZE DISTRIBUTION OF MATERIAL
TRANSPORTED AS BED LOAD 94 5.4.3. COMPOSITION OF BED LOAD TRANSPORT 96
5.4.4. RELATIONS OF BED LOAD TRANSPORT AND BED SHEAR STRESS 98 5.4.5.
SPATIAL AND TEMPORAL VARIABILITY OF MEASURED BED LOAD TRANSPORT 102 5.5.
MEASUREMENT OF SUSPENDED SEDIMENT TRANSPORT 104 5.5.1. INSTRUMENTATION
AND SET-UP OF FIELD MEASUREMENT 105 5.5.2. DETERMINATION OF SUSPENDED
SEDIMENT CONCENTRATION 106 5.5.3. SUSPENDED SEDIMENT CHARACTERISTICS OF
KULFO RIVER 107 5.5.4. GRAIN SIZE DISTRIBUTION OF SUSPENDED SEDIMENT
MATERIALS 110 6. COMPUTATIONS OF SEDIMENT DISCHARGES AND LOADS 112 6.1.
INTRODUCTION 112 6.2. COMPUTATION OF BED LOAD DISCHARGE FROM DIRECT
FIELD MEASUREMENT 112 6.2.1. DEVELOPMENT OF BED LOAD RATING CURVE 112
6.2.2. COMPUTATION OF BED LOAD DISCHARGE 114 6.3. COMPUTATION OF
SUSPENDED SEDIMENT DISCHARGE AND LOAD FROM DIRECT FIELD MEASUREMENT 118
6.3.1. DEVELOPMENT OF SUSPENDED SEDIMENT RATING CURVE 118 6.3.2.
COMPUTATION OF SUSPENDED SEDIMENT TRANSPORT BY CONCENTRATION GRAPH -
HYDROGRAPH METHOD 120 6.3.3. COMPUTATION OF SUSPENDED SEDIMENT TRANSPORT
BY FLOW DURATION CURVE - SEDIMENT RATING CURVE (FDRC) METHOD 122 6.4.
PREDICTION OF SEDIMENT DISCHARGE USING SEDIMENT TRANSPORT EQUATIONS 125
6.4.1. COMPARISON OF SEDIMENT TRANSPORT EQUATIONS 126 6.4.2. PREDICTION
OF BED LOAD DISCHARGE 129 O INVESTIGATION ON SEDIMENT TRANSPORT
CHARACTERISTICS AND IMPACTS OF HUMAN ACTIVITIES ON MORPHOLOGICAL
PROCESSES OF ETHIOPIAN RIVERS: CASE STUDY OF KULFO RIVER. SOUTHERN
ETHIOPIA 6.4.3. PREDICTION OF SUSPENDED SEDIMENT DISCHARGE 132 6.4.3.1.
PREDICTION OF TOTAL SEDIMENT DISCHARGE 134 7. ASSESSMENT OF EFFECTS OF
NATURAL FACTORS AND HUMAN ACTIVITIES ON RIVER MORPHOLOGY 137 7.1.
GENERAL 137 7.2. ASSESSMENT OF RIVERBED CHANGES DUE TO WATER DIVERSION
AND NATURAL FACTORS 137 7.3. SPECIFIC GAUGE ANALYSIS 138 7.3.1.
COMPARATIVE THALWEG ANALYSIS 140 7.3.2. ANALYSIS OF CROSS SECTION
GEOMETRY 141 7.4. OTHER IMPACTS OF DIVERSION OBSERVED IN THE FIELD 142
7.4.1. CHANNEL RESPONSES TO REDUCTION IN DISCHARGE DUE TO DIVERSION 143
7.5. ASSESSMENT OF RIVERBED CHANGES USING GSTARS 2.1 MODEL 150 7.5.1.
INTRODUCTION 150 7.5.2. DATA REQUIREMENTS FOR MODELING WITH GSTARS 2.1
151 7.5.3. MODELING SEDIMENT TRANSPORT AND BED LEVEL CHANGES WITH GSTARS
2.1 153 7.6. ASSESSMENT OF EFFECTS OF GRAVEL MINING ON KULFO BRIDGE AND
RIVER MORPHOLOGY USING BRI-STARS MODEL 155 7.6.1. MECHANISMS AND CAUSES
OF SCOUR AT BRIDGE PIERS 156 7.6.2. MAJOR COMPONENTS AND METHODS OF
SEDIMENT ROUTING IN BRI-STARS 159 7.6.3. CALIBRATION OF BRI-STARS MODEL
162 7.6.4. SCOUR PREDICTIONS AT KULFO BRIDGE FOR 100-YEAR FLOOD 164
7.6.5. ESTIMATION OF THE EFFECT OF GRAVEL MINING BY SIMULATING VARIOUS
MINING ALTERNATIVES 165 7.6.6. ESTIMATING THE EFFECTS OF DIFFERENT FORMS
OF GRAVEL MINING ON SCOUR AT KULFO BRIDGE 167 7.6.7. RECOMMENDATIONS FOR
SUSTAINABLE USE OF GRAVEL RESOURCES WITH MINIMUM NEGATIVE IMPACTS ON THE
BRIDGE AND RIVER MORPHOLOGY 169 8. SUMMARY AND CONCLUSIONS 172
REFERENCES 176 APPENDICES 182 |
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| indexdate | 2025-01-10T13:06:57Z |
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| series | Dresdner wasserbauliche Mitteilungen |
| series2 | Dresdner wasserbauliche Mitteilungen |
| spelling | Girma, Nigussie Teklie Verfasser aut Investigation on sediment transport characteristics and impacts of human activities on morphological processes of Ethiopian rivers case study of Kulfo river, Southern Ethiopia = Untersuchungen des Sedimenttransports und der Einflüsse menschlicher Aktivitäten auf die morphologischen Prozesse äthiopischer Flüsse Nigussie Teklie Girma Untersuchungen des Sedimenttransports und der Einflüsse menschlicher Aktivitäten auf die morphologischen Prozesse äthiopischer Flüsse Dresden Inst. für Wasserbau und Techn. Hydromechanik 2005 227 S. Ill., graph. Darst., Kt. txt rdacontent n rdamedia nc rdacarrier Dresdner wasserbauliche Mitteilungen 30 Zugl.: Dresden, Techn. Univ., Diss., 2005 Text engl. Sedimenttransport (DE-588)4180614-1 gnd rswk-swf Fluss (DE-588)4131972-2 gnd rswk-swf Geomorphologie (DE-588)4130684-3 gnd rswk-swf Anthropogener Einfluss (DE-588)4327906-5 gnd rswk-swf Äthiopien Süd (DE-588)4056217-7 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Äthiopien Süd (DE-588)4056217-7 g Fluss (DE-588)4131972-2 s Sedimenttransport (DE-588)4180614-1 s Geomorphologie (DE-588)4130684-3 s Anthropogener Einfluss (DE-588)4327906-5 s b DE-604 Dresdner wasserbauliche Mitteilungen 30 (DE-604)BV010512532 30 HEBIS Datenaustausch Darmstadt application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=013366088&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Girma, Nigussie Teklie Investigation on sediment transport characteristics and impacts of human activities on morphological processes of Ethiopian rivers case study of Kulfo river, Southern Ethiopia = Untersuchungen des Sedimenttransports und der Einflüsse menschlicher Aktivitäten auf die morphologischen Prozesse äthiopischer Flüsse Dresdner wasserbauliche Mitteilungen Sedimenttransport (DE-588)4180614-1 gnd Fluss (DE-588)4131972-2 gnd Geomorphologie (DE-588)4130684-3 gnd Anthropogener Einfluss (DE-588)4327906-5 gnd |
| subject_GND | (DE-588)4180614-1 (DE-588)4131972-2 (DE-588)4130684-3 (DE-588)4327906-5 (DE-588)4056217-7 (DE-588)4113937-9 |
| title | Investigation on sediment transport characteristics and impacts of human activities on morphological processes of Ethiopian rivers case study of Kulfo river, Southern Ethiopia = Untersuchungen des Sedimenttransports und der Einflüsse menschlicher Aktivitäten auf die morphologischen Prozesse äthiopischer Flüsse |
| title_alt | Untersuchungen des Sedimenttransports und der Einflüsse menschlicher Aktivitäten auf die morphologischen Prozesse äthiopischer Flüsse |
| title_auth | Investigation on sediment transport characteristics and impacts of human activities on morphological processes of Ethiopian rivers case study of Kulfo river, Southern Ethiopia = Untersuchungen des Sedimenttransports und der Einflüsse menschlicher Aktivitäten auf die morphologischen Prozesse äthiopischer Flüsse |
| title_exact_search | Investigation on sediment transport characteristics and impacts of human activities on morphological processes of Ethiopian rivers case study of Kulfo river, Southern Ethiopia = Untersuchungen des Sedimenttransports und der Einflüsse menschlicher Aktivitäten auf die morphologischen Prozesse äthiopischer Flüsse |
| title_full | Investigation on sediment transport characteristics and impacts of human activities on morphological processes of Ethiopian rivers case study of Kulfo river, Southern Ethiopia = Untersuchungen des Sedimenttransports und der Einflüsse menschlicher Aktivitäten auf die morphologischen Prozesse äthiopischer Flüsse Nigussie Teklie Girma |
| title_fullStr | Investigation on sediment transport characteristics and impacts of human activities on morphological processes of Ethiopian rivers case study of Kulfo river, Southern Ethiopia = Untersuchungen des Sedimenttransports und der Einflüsse menschlicher Aktivitäten auf die morphologischen Prozesse äthiopischer Flüsse Nigussie Teklie Girma |
| title_full_unstemmed | Investigation on sediment transport characteristics and impacts of human activities on morphological processes of Ethiopian rivers case study of Kulfo river, Southern Ethiopia = Untersuchungen des Sedimenttransports und der Einflüsse menschlicher Aktivitäten auf die morphologischen Prozesse äthiopischer Flüsse Nigussie Teklie Girma |
| title_short | Investigation on sediment transport characteristics and impacts of human activities on morphological processes of Ethiopian rivers |
| title_sort | investigation on sediment transport characteristics and impacts of human activities on morphological processes of ethiopian rivers case study of kulfo river southern ethiopia untersuchungen des sedimenttransports und der einflusse menschlicher aktivitaten auf die morphologischen prozesse athiopischer flusse |
| title_sub | case study of Kulfo river, Southern Ethiopia = Untersuchungen des Sedimenttransports und der Einflüsse menschlicher Aktivitäten auf die morphologischen Prozesse äthiopischer Flüsse |
| topic | Sedimenttransport (DE-588)4180614-1 gnd Fluss (DE-588)4131972-2 gnd Geomorphologie (DE-588)4130684-3 gnd Anthropogener Einfluss (DE-588)4327906-5 gnd |
| topic_facet | Sedimenttransport Fluss Geomorphologie Anthropogener Einfluss Äthiopien Süd Hochschulschrift |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=013366088&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
| volume_link | (DE-604)BV010512532 |
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