Autogenic Controls On Debris Flow Fans With Limited Accommodation Space Laboratory Experiments Informed By A Field Example PDF Download
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Author | : Kailey Adams |
Publisher | : |
Total Pages | : 62 |
Release | : 2017 |
Genre | : |
ISBN | : |
Download AUTOGENIC CONTROLS ON DEBRIS-FLOW FANS WITH LIMITED ACCOMMODATION SPACE: LABORATORY EXPERIMENTS INFORMED BY A FIELD EXAMPLE. Book in PDF, ePub and Kindle
Decades of historic levels of urbanization and expansion of the built environment on to existing alluvial fans at the periphery of most cities has placed humans at risk of floods and debris-flows that are formative processes on alluvial fans. Understanding the evolution of these features is to understand risks to human lives and infrastructure in these locations. Therefore, there is a need to explore the myriad of factors affecting alluvial fan evolution. Here, physical modeling is used to explore the effect of limited longitudinal accommodation space on autogenically derived debris-flow fan evolution. Physical modeling has furthered our understanding of the formative processes of alluvial fans, in part, by allowing for the isolated control of any number of variables. Operating in a laboratory setting also allows researchers to overcome potential challenges posed by field work (site remoteness, hazardous environments, unpredictability of phenomena, etc.) while creating an environment for manageable data collection. Prior alluvial fan physical modeling has largely focused on fluvially generated fans rather than those dominated by debris flow deposition. Moreover, the studies that have considered the latter have only done so under the assumption of unlimited accommodation space (the area in which fans can prograde); an assumption that is frequently not representative of natural conditions. Here, two debris-flow fans are generated using a small-scale physical model in order to explore the influence of limited longitudinal accommodation space on autogenic avulsion patterns. Fan-toe erosion is simulated through the repeated removal of debris-flow material at a fixed distance from the fan apex. Aided by high-resolution terrestrial laser scanning (TLS) data, geomorphic change detection and topographic profiles are used to examine differences in fan evolution. Results from small-scale physical modeling experiments show that cycles of channelization, the formation and persistence of a stabilized channel, channel narrowing and overflow, and avulsion result in the formation of new fan segments on a debris-flow fan with limited accommodation space. These results provide evidence for an explanation of debris-flow fan evolution alternative to the most widely accepted theory which can be summarized as cycles of channelization, backfilling, and avulsion. Furthermore, these results are informed and supported by field observations of a debris-flow fan located in Chalk Cliffs near Nathrop, Coloradao, USA where the fan-toe is periodically eroded by Chalk Creek.
Author | : Gaspardo |
Publisher | : |
Total Pages | : 0 |
Release | : 1997 |
Genre | : |
ISBN | : |
Download The Occurrence of Debris Flow Book in PDF, ePub and Kindle
Author | : Rosanna Sosio |
Publisher | : |
Total Pages | : 153 |
Release | : 2007 |
Genre | : |
ISBN | : |
Download Study of Debris-flow Behavior Book in PDF, ePub and Kindle
Author | : D. Ventra |
Publisher | : Geological Society of London |
Total Pages | : 351 |
Release | : 2018-07-04 |
Genre | : Science |
ISBN | : 1786202670 |
Download Geology and Geomorphology of Alluvial and Fluvial Fans Book in PDF, ePub and Kindle
Alluvial and fluvial fans are the most widespread depositional landform bordering the margins of highland regions and actively subsiding continental basins, across a broad spectrum of tectonic and climatic settings. They are significant to the local morphodynamics of mountain regions and also to the evolution of sediment-routing systems, affecting the propagation and preservation of stratigraphic signals of environmental change over vast areas. The volume presents case studies discussing the geology and geomorphology of alluvial and fluvial fans from both active systems and ancient ones preserved in the stratigraphic record. It brings together case studies from a range of continents, climatic and tectonic settings, some introducing innovative monitoring and analysis techniques, and it provides an overview of current debates in the field. This volume will be of particular interest to geologists, geomorphologists, sedimentologists and the general reader with an interest in Earth science.
Author | : National Research Council |
Publisher | : National Academies Press |
Total Pages | : 180 |
Release | : 2010-04-25 |
Genre | : Science |
ISBN | : 0309140242 |
Download Landscapes on the Edge Book in PDF, ePub and Kindle
During geologic spans of time, Earth's shifting tectonic plates, atmosphere, freezing water, thawing ice, flowing rivers, and evolving life have shaped Earth's surface features. The resulting hills, mountains, valleys, and plains shelter ecosystems that interact with all life and provide a record of Earth surface processes that extend back through Earth's history. Despite rapidly growing scientific knowledge of Earth surface interactions, and the increasing availability of new monitoring technologies, there is still little understanding of how these processes generate and degrade landscapes. Landscapes on the Edge identifies nine grand challenges in this emerging field of study and proposes four high-priority research initiatives. The book poses questions about how our planet's past can tell us about its future, how landscapes record climate and tectonics, and how Earth surface science can contribute to developing a sustainable living surface for future generations.
Author | : Stanley Alfred Schumm |
Publisher | : Wiley-Interscience |
Total Pages | : 442 |
Release | : 1987 |
Genre | : Science |
ISBN | : |
Download Experimental Fluvial Geomorphology Book in PDF, ePub and Kindle
This book brings together the results of several years of experimental work - much of it never before published - in drainage basin evolution, hydrology, river-channel morphology and sedimentology. These investigations are related to real-world applications, particularly geological exploration and mapping. The book shows how awareness of natural phenomena can improve management of the natural environment, such as the control of rivers and eroding gullies.
Author | : Simon A. Lomas |
Publisher | : Geological Society of London |
Total Pages | : 340 |
Release | : 2004 |
Genre | : Science |
ISBN | : 9781862391499 |
Download Confined Turbidite Systems Book in PDF, ePub and Kindle
This publication reflects a growing appreciation of the extent to which turbidite depositional system development is fundamentally affected by basin-floor topography. In the many turbidite and turbidite hydrocarbon reservoirs, depositional patterns have been moderately to strongly confined by pre-existing slopes. This volume examines aspects of sediment dispersal and accumulation in deep-water systems where sea-floor topography has exerted a decisive control on deposition, and explores the associated controls on hydrocarbon reservoir architecture and heterogeneity.
Author | : Andrew Miall |
Publisher | : Springer Science & Business Media |
Total Pages | : 316 |
Release | : 2013-08-23 |
Genre | : Science |
ISBN | : 3319006665 |
Download Fluvial Depositional Systems Book in PDF, ePub and Kindle
This book is intended to complement the author's 1996 book "The geology of fluvial deposits", not to replace it. The book summarizes methods of mapping and interpretation of fluvial depositional systems, with a detailed treatment of the tectonic, climatic and eustatic controls on fluvial depositional processes. It focuses on the preserved, ancient depositional record and emphasizes large-scale (basin-scale) depositional processes. Tectonic and climatic controls of fluvial sedimentation and the effects of base-level change on sequence architecture are discussed. Profusely illustrated and with an extensive reference to the recent literature, this book will be welcomed by the student and professional geologist alike.
Author | : David A. Budd |
Publisher | : |
Total Pages | : 0 |
Release | : 2016 |
Genre | : Diagenesis |
ISBN | : 9781565763425 |
Download Autogenic Dynamics and Self-organization in Sedimentary Systems Book in PDF, ePub and Kindle
Autogenic dynamics and self-organization in sedimentary systems are increasingly viewed as significant and important processes that drive erosion, sediment transport, and sediment accumulation across the Earth's surface. These internal dynamics can dramatically modulate the formation of the stratigraphic record, form biologically constructed depositional packages, affect ecological patterning in time and space, and impact aspects of geochemical sedimentation and diagenesis. The notion that autogenic processes are local phenomena of short duration and distance is now recognized as false. Understanding autogenic dynamics in sedimentary systems is thus essential for deciphering the morphodynamics of moderns sedimentary systems, accurately reconstructing Earth history, and predicting the spatial and temporal distribution of sedimentary and paleobiologic features in the stratigraphic record. The thirteen papers in this volume present exciting new ideas and research related to autogenic dynamics and self-organization in sedimentology, stratigraphy, ecology, paleobiology, sedimentary geochemistry, and diagenesis. Five papers summarize the current state of thinking about autogenic processes and products in fluvial-deltaic, eolian, and carbonate depositional systems, and in paleobiologic and geochemical contexts. A second group of papers provide perspectives derived from numerical modeling and laboratory experiments. The final section consists of field studies that explore autogenic processes and autogenically modulated stratigraphy in five case studies covering modern and ancient fluvial, deltaic, and shelf settings. This SP should stimulate further research as to how self-organization might promote a better understanding of the sedimentary record.
Author | : Andrew D. Miall |
Publisher | : Springer Science & Business Media |
Total Pages | : 436 |
Release | : 2013-06-29 |
Genre | : Science |
ISBN | : 3662033801 |
Download The Geology of Stratigraphic Sequences Book in PDF, ePub and Kindle
Sequence stratigraphy represents a new paradigm in geology. The principal hypothesis is that stratigraphie successions may be subdivided into discrete sequences bounded by widespread unconformities. There are two parts to this hypothesis. First, it suggests that the driving forces which generate sequences and their bounding unconformities also generate predietable three-dimensional stratigraphies. In re cent years stratigraphie research guided by sequence models has brought about fundamental im provements in our understanding of stratigraphie processes and the controls of basin architecture. Sequence models have provided a powerful framework for mapping and numerieal modeling, enabling the science of stratigraphy to advance with rapid strides. This research has demonstrated the importance of a wide range of processes for the generation of cyclie sequences, including eustasy, tectonics, and orbital forcing of climate change. The main objective of this book is to document the sequence record and to discuss our current state of knowledge about sequence-generating processes.