Publisher: metropolis University Press 2009-10-30 | 330 Pages | ISBN: 0521868521 | PDF | 19.5 MB
Megaflooding is the explosive execute of surpassing volumes of water. Megafloods hit significantly changed the terrain of Earth and Mars, and haw hit acted as triggers for status modify on these planets. Recently, investigate into megaflooding has prefabricated essential advances: on Earth, real-time measurements of equal floods in island hands investigate into senior and super worldly floods, patch on Mars terabytes of accumulation from individual satellite orbiting that follower are dramatically redaction our analyse of high there. Beginning with a arts overview of batch science, the aggregation presents sections on geophysics and mechanisms, batch sedimentology, and modeling, apiece illustrated with examples from Earth and Mars. By juxtaposing worldly and Martian research, this intensity creates a unequalled reasoning to boost our discernment of these super paleoflood events. It is an valuable meaning for researchers and students of hydrology, geomorphology, sedimentology and international science, as substantially as environmental and hydraulic engineers.
Contents
List of contributors tender viii
1 Overview of megaflooding: Earth and Mars 1
Victor R. Baker
Summary 1
1.1 Introduction 1
1.2 Historical and ideologic overview 1
1.3 The Great Scablands Debate 2
1.4 Terrestrial megafloods 3
1.5 Martian megafloods 6
1.6 Global consequences 6
1.7 Modern controversies 7
1.8 Discussion 9
Acknowledgements 9
References 9
2 Channel-scale erosional bedforms in bedrock
and in lax granular material: character,
processes and implications 13
Paul A. Carling, J¨urgen Herget, Julia K. Lanz,
Keith histrion and Andrea Pacifici
Summary 13
2.1 Introduction 13
2.2 Historical appearance 14
2.3 Processes of bedrock wearing 14
2.4 A typology of channel-scale erosional
bedforms in bedrock 15
2.5 Example of a rattling super bedrock channel
complex: Kasei Valles, Mars 23
2.6 Conclusions 27
References 27
3 A analyse of open-channel megaflood
depositional landforms on Earth and Mars 33
Paul A. Carling, county M. Burr, Timothy F.
Johnsen and histrion A. Brennand
Summary 33
3.1 Introduction 33
3.2 Geomorphological considerations 34
3.3 Theoretical scenery to sediment
transport and accumulation 36
3.4 Megaflood depositional landforms 38
3.5 Discussion and conclusions 45
References 45
v
vi Contents
4 J¨okulhlaups in Iceland: sources, promulgation and
drainage 50
Helgi Bj¨ornsson
Summary 50
4.1 Introduction 50
4.2 Subglacial lakes 50
4.3 Marginal lakes 58
4.4 Subglacial eruptions as a maker of
j¨okulhlaups 59
4.5 Conclusions 61
Notation 61
References 62
5 Channeled Scabland geophysics 65
Victor R. Baker
Summary 65
5.1 Introduction 65
5.2 Regional patterns 66
5.3 Macroscale erosional opencast forms 68
5.4 Macroscale depositional opencast forms 70
5.5 Mesoscale erosional opencast forms 71
5.6 Mesoscale depositional opencast forms 73
5.7 Palaeohydraulic implications 74
5.8 Discussion 75
Acknowledgements 75
References 75
6 The geophysics and sedimentology of
landforms created by subglacial megafloods 78
Mandy J. Munro-Stasiuk, Evangelist Shaw, Darren B.
Sjogren, histrion A. Brennand, Timothy G. Fisher,
David R. Sharpe, prince S. G. Kor, Claire L.
Beaney and doc B. Rains
Summary 78
6.1 Introduction 78
6.2 Microforms 80
6.3 Mesoforms 85
6.4 Macroforms 95
6.5 Megaforms 96
6.6 Subglacial hydrology 97
6.7 Concluding remarks 99
Acknowledgements 100
References 100
7 Proglacial megaflooding along the margins of
the Laurentide Ice Sheet 104
Alan E. Kehew, Mark L. Lord, saint L.
Kozlowski and Timothy G. Fisher
Summary 104
7.1 Introduction 104
7.2 Dams and triggers 105
7.3 Erosional processes and landforms 106
7.4 Depositional processes and landforms 108
7.5 Palaeohydrologic considerations 109
7.6 Anatomy of a glacial lake megaflood:
the glacial Lake Regina occurrence 110
7.7 Megafloods westerly of Lake naturalist 111
7.8 Lake naturalist and megaflood outflows 111
7.9 Southern megaflood evacuation from the
Great Lakes basins 115
7.10 Eastern megaflood evacuation from the
Great Lakes basins 118
7.11 Conclusions 123
Acknowledgements 123
References 123
8 Floods from uncolored rock-material dams 128
Jim E. O’Connor and Robin A. Beebee
Summary 128
8.1 Introduction 128
8.2 Floods from breached depression blockages 129
8.3 Floods from breached basins 132
8.4 Flood ratio and activity 137
8.5 Erosional and depositional features from
natural barrier failures 145
8.6 Concluding remarks 147
Acknowledgements 147
References 163
9 Surface geophysics and lineage of outflow
channels in the Valles Marineris location 172
Neil M. Coleman and Victor R. Baker
Summary 172
9.1 Introduction 172
9.2 Outflow channels that emerged from the
chasmata or another super basins 174
9.3 Outflow channels that emerged
from separate disorganised terrain or
fault zones 184
9.4 Conclusions 191
Acknowledgements 191
References 191
10 Floods from fossae: a analyse of
Amazonian-aged extensional–tectonic
megaflood channels on Mars 194
Devon M. Burr, Lionel bugologist and
Alistair S. Bargery
Summary 194
10.1 Introduction 194
10.2 Ages 194
10.3 Morphology 196
10.4 Mechanisms triggering liquid promulgation 201
10.5 Thermal and machinelike aspects of
water promulgation 203
10.6 Summary and implications 204
Acknowledgements 205
References 205
Contents vii
11 Large washstand stream floods on Mars 209
Rossman P. Irwin threesome and Evangelist A. Grant
Summary 209
11.1 Introduction 209
11.2 Peak execute from damburst floods
on Mars 210
11.3 Basin impact on Martian outflow
channels 211
11.4 Intermediate-scale washstand overflows
on Mars 214
11.5 Conclusions 220
References 221
12 Criteria for identifying j¨okulhlaup deposits in
the sedimentary achievement 225
Philip M. Marren and Matthias Schuh
Summary 225
12.1 Introduction 225
12.2 Defining grave criteria 226
12.3 The nature of j¨okulhlaup high 226
12.4 J¨okulhlaup alluviation 227
12.5 Skeiðar´arsandur j¨okulhlaup bar
case think 232
12.6 Discussion: criteria for identifying
j¨okulhlaups in the sedimentary achievement 237
12.7 Conclusions 237
Acknowledgements 238
References 238
13 Megaflood sedimentary depression fill: Altai
Mountains, Siberia 243
Paul A. Carling, I. saint Martini, J¨urgen
Herget, Pavel Borodavko and
Sergei Parnachov
Summary 243
13.1 Introduction 243
13.2 Methods 244
13.3 Perspective 244
13.4 Sediment characteristics of the giant
bars 248
13.5 Discussion 258
13.6 Conclusions 262
Acknowledgements 262
References 263
14 Modelling of subaerial j¨okulhlaups in island 265
Snorri P´all Kjaran, Sigurður L´arus H´olm,
Eric M. Myer, T´omas J´ohannesson and
Peter Sampl
Summary 265
14.1 Introduction 265
14.2 J¨okulhlaups from Katla and
Eyjafjallaj¨okull 266
14.3 Dynamics of subaerial j¨okulhlaups 266
14.4 Numerical compound 268
14.5 Model simulations: digit examples 269
14.6 Discussion 270
Acknowledgements 271
References 271
15 J¨okulhlaups from Kverkfj¨oll volcano, Iceland:
modelling transient hydraulic phenomena 273
Jonathan L. Carrivick
Summary 273
15.1 Introduction, scenery and explanation 273
15.2 Aim 274
15.3 Study place 274
15.4 Methodology 274
15.5 Results and rendering 276
15.6 Discussion 283
15.7 Conclusions 286
Acknowledgements 287
References 287
16 Dynamics of changeful line in Martian
outflow channels 290
Lionel Wilson, Alistair S. Bargery and
Devon M. Burr
Summary 290
16.1 Introduction 290
16.2 Water sources 290
16.3 Water raise to the opencast 291
16.4 Water promulgation at the opencast 293
16.5 Dynamics of liquid line 295
16.6 Water line thermodynamics and
rheology 302
16.7 Closing unofficial 305
Notation 306
Acknowledgements 307
References 307
Index 312
The colouration plates are situated between
pages 182 and 183
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