This collection of papers is based largely on contributions by participants in a series of special sessions at the June 1995 South East Asia Conference of the International Association of Geomorphologists. The concept that draws these papers together is perhaps best explained in the following excerpt from the call for papers that was issued in advance of the conference:
The underlying premise was that the world's rivers encompass a wide range of influences and associated fluvial forms, but that the geomorphic literature traditionally has focused most intensively on examples mostly comprised of alluvial rivers from humid temperate, semiarid, or proglacial environments. Although the range of examples covered in the professional literature has certainly broadened over the last couple of decades, the textbooks through which most students are first exposed to geomorphology are focused increasingly on the mechanics of alluvial rivers but for the most part do not treat a spectrum of morphological types that is proportionally representative of the rivers that actually exist on the earth's surface. (The diversity of influences on fluvial form is perhaps better illustrated in some of the texts published by authors from the southern hemisphere; see for example Selby, 1985.) We believe that a presentation that includes some of the outliers on this spectrum may broaden our scientific vocabulary and lead ultimately to improved understanding of fluvial processes and their role in landscape evolution.
Thus the intention of this volume is, first and foremost, to present an international set of case studies with a strong descriptive component, representing the diversity of fluvial forms. Although these examples are by no means unique and they clearly are all governed by the same physical laws, it is also true that virtually everyone who attended the sessions in Singapore had an opportunity to see something that he or she had not seen before. To quote Baker and Komatsu in the opening paper of this volume, ?excitement and pleasure in science derive not so much from achieving the final explanation as from discovering the fascinating range of new phenomena to be explained.? It is our hope that readers of this volume will share some of that excitement and pleasure.
Foreword
M.Gordon Wolman
Introduction
Andrew J. Miller and Avijit Gupta
Interplanetary Comparisons
Extraterrestrial fluvial forms
V.R. Baker and G. Komatsu
Bedrock and Mixed Bedrock/Alluvial Rivers
Bedrock anastomosing channel systems: morphology and dynamics
in the Sabie River, Mpumalanga Province, South Africa
W. van Niekerk, G. L. Heritage, L. J. Broadhurst
and B. P. Moon
The geomorphology of the Sabie River, South Africa: an
incised bedrock influenced channel
G.L. Heritage, A.W. van Niekerk, and B.P. Moon
Geomorphology of the Green River in the Eastern Uinta
Mountains, Dinosaur National Monument, Colorado and Utah
Paul E. Grams and John C. Schmidt
The Narmada River, India through space and time
Avijit Gupta, Vishwas S. Kale, and S.N. Rajaguru
Drainage evolution and morphological development of the
late Cenozoic Sundays River, South Africa
Johan Hattingh and Izak C. Rust
Fluvial evolution in areas with volcanic and tectonic
activity: the Armería River, Mexico
David Palacios and Armando Chávez
Boulder bedforms in jointed-bedrock channels
Rainer Wende
Arid-region rivers
Floodouts in central Australia
Stephen Tooth
Fluvial form variability in arid central Australia
Mary C. Bourke and Geoff Pickup
The Uniab River fan, an unusual alluvial fan on the hyper-arid
Skeleton Coast, Namibia
A.C.T. Scheepers and Izak C. Rust
Downstream adjustments in allochthonous rivers: Western
Deccan Trap upland region, India
Leena A. Deodhar and Vishwas S. Kale
Debris flow and sheet flood fans of the northern Prince
Charles Mountains, East Antarctica
John A. Webb and Chris. R. Fielding
Patterns of alluvial deposition
The Fly River, Papua New Guinea: inferences about river
dynamics, floodplain sedimentation and fate of sediment
William E. Dietrich, Geoff Day and Gary Parker
Downstream changes in valley confinement as a control
on floodplain morphology, lower Tuross River, New South Wales, Australia
- A constructivist approach to floodplain analysis
Rob J. Ferguson & Gary J. Brierley
Flow and sedimentation at tributary river mouths : a comparison
with mesotidal estuaries
Barbara A. Kennedy
Geomorphology and coastline change of the lower Yangtze
delta plain, China
Zhongyuan Chen
In-channel benches: the role of floods in their formation
and destruction on bedrock-confined rivers
Wayne D. Erskine and Elizabeth A. Livingstone
Anabranching rivers: divided efficiency leading to fluvial
diversity
Gerald C. Nanson and H. Q. Huang
Review papers
Varieties of fluvial form - the relevance to geologists
of an expanded reality
Christopher R. Fielding
Towards an understanding of varieties of fluvial form
Michael J. Kirkby