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NOTES FROM THE CHAIR: Geomorphology
in Context - From
Carol Harden
It
is useful to gain international perspective on what we do. The
following comments rise from my experience at the Fourth International
Conference on Geomorphology, convened in August 1997 in Bologna,
Italy, by the International Association of Geomorphologists.
I encourage you to attend an IAG function. International conferences
occur every four years (next in Japan in 2001). From a global
perspective, we North American geomorphologists show up as being
mostly process-oriented, but not always successful in putting
our work in broader contexts (hence, we frequently appear to
be examining our navels).
As
geomorphologists, many of us tell the stories of places, large
and small and of single or multiple events in those places. Sometimes
we connect the geomorphic story to geologic or anthropic history.
Sometimes we relate the events of the geomorphic story to climatic
events; sometimes the geomorphic story helps interpret the climate
story. In order to do this, we continue to develop or borrow
new tools of measurement, dating, analysis and presentation.
Presentation is significant because it enhances our ability to
communicate, not only with other geomorphologists, but with decision-makers,
the general public and colleagues in other sciences. These linkages
are increasingly essential if geomorphology is to flourish.
Site-specific
research in geomorphology contributes a better understanding
of landscapes, one which we hope will help shape better land-use
decisions. Our work to document rates of geomorphic change in
specific places contributes to the general understanding of the
land surface system and helps delineate the "realm of the possible,"
especially with regard to catastrophic events. Site-specific
geomorphology also equips the researcher with the ability to
put on good field trips, thus furthering the educational experience
of colleagues.
But
beyond site-specific studies there remains a need to identify
more general patterns, to organize our understanding and develop
the capacity for prediction. Real additions to geomorphic thinking
come from comparisons and analyses. When we are lucky, we find
patterns with simple mathematical expressions - then we marvel
at the elegance of nature. Because we work with complex systems,
however, an elegant solution is rarely obtained, and, inevitably,
solutions will be appropriate to only one situation or region
or have many exceptions. This cloud has a silver lining. One
thing we can contribute to other sciences is our considerable experience
in working with messy data and uncertainty. From "equifinality"
to types of instability, applications of chaos theory and the
development of approaches for tackling issues of scale, we have
the opportunity to be leaders in new frontiers of science.
It's
time for new frontiers. We have explored most of this planet,
except for the ocean basins. It is unlikely that new geomorphic
processes remain to be discovered. If we have a blind spot, it
is for the geomorphic effects of human activities .
Back
to context. Whether our work is site-specific or generalized,
its value is greater if we undertake it and present it in a broad
context. To do so challenges us to reflect and consider the way
in which our small "piece" fits into the grander "puzzle" of
scientific knowledge, and it forces us to consider the basic
questions of "so what?" and "who cares?" Those who should care
are more likely to do so if we are explicit about the connection
between our contributions and their interests.
--
Carol Harden, University of Tennessee
Past Officers of the Geomorphology Specialty
Group:
Compiled by Allan James, based on past newsletters and an earlier
report by Ron Dorn.
1978-79
Richard H. Kesel, Colin Thorn, and John D. Vitek were elected
as representatives to help in the promotion and formation of
a specialty group.
1979-80 Percy Daugherty, Colin Thorn, and John D. Vitek were
elected as representatives to help in the promotion and formation
of a specialty group.
Year
Chair / Sec.-Treas.
1980-81 Jack Vitek / Will Graf
1981-82 Will Graf / Stan Trimble
1982-83 Stan Trimble / Terry Toy
1983-84 Terry Toy / Athol Abrahams
1984-85 Athol Abrahams / Rick Giardino
1985-86 Rick Giardino / Dick Marston
1986-87 Dick Marston / John Dixon
1987-88 John Dixon / Jim Gardner
1988-89 Jim Gardner / Dave Butler
1989-90 Dave Butler / Pat McDowell
1990-91 Pat McDowell / Ron Dorn
1991-92 Ron Dorn / Bill Johnson
1992-93 Bill Johnson / Andrew Marcus
1993-94 Andrew Marcus / Vatche Tchakerian
1994-95 Vatche Tchakerian / Allan James
1995-96 Allan James / Bruce Rhoads
1996-97 Bruce Rhoads / Carol Harden
1997-98 Carol Harden / Jeff Lee
News from Departments and/or Individuals
David
Butler.
Professor of Geography at Southwest Texas State University, was
an invited speaker at the U.S. Geological Survey-sponsored Human-Induced
Environmental Change Workshop, held in mid-September at the Flathead
Lake Biological Station in Polson, Montana. Prior to the workshop,
he spent several days conducting fieldwork with George Malanson,
Steve Walsh, Dave Cairns, and Dan Brown in Glacier National Park,
Montana. At the workshop, Dave co-presented (with George and
Steve) the paper "Issues of scale, pattern, and process in the
analysis of Rocky Mountain Landscapes". In conjunction with Malanson,
Walsh, and Cairns, he also led the fieldtrip "Geoecology of the
Logan Pass area, Glacier National Park" on September 19th.
Dave
recently co-guest edited a special issue of "Geomorphology" with
Steve Walsh of North Carolina. The Special Issue, Vol. 21 (3-4),
is devoted to the topic "applications of remote sensing and GIS
in geomorphology". Dave also continues as Book Review Editor
for the journal, and encourages volunteers to send him topical
areas in which they'd like to review books for the journal.
Recent
grants include an approved Quick Response Grant (1997-1998) from
the Natural Hazards Research and Applications Information Center,
in Boulder, Colorado, on the topic of public responses to geomorphic
hazards in northwest Montana and how those responses compare
to those generated by snow avalanche hazards; and a Southwest
Texas State University Faculty Research Enhancement Grant (1998)
for summer fieldwork on repeat photography of landscape changes
from Fire Lookout towers. A recently unearthed cache of photographs
from the mid-1930s will serve as the basis for the comparison,
with some intermediate views taken by Dave in 1975 also available.
Recent
publications include:
- Butler, David R., and Stephen J. Walsh, 1998. The
application of remote sensing and geographic information systems
in the study of geomorphology: an introduction. Geomorphology
21(3-4), 179-181.
- Walsh, Stephen J., David R. Butler, and George P.
Malanson, 1998. An overview of scale, pattern, process relationships
in geomorphology: a remote sensing and GIS perspective. Geomorphology
21(3-4), 183-205.
- Butler, David R., 1997. The physical geography of
North Carolina. In: Field Guide to North Carolina - Tar Heel
Bus Tour (M. Smith and J. Wegner, eds.), University of North
Carolina, Chapel Hill, NC, pp. 75-81.
- Walsh, Stephen J., and David R. Butler, 1997. Morphometric
and multispectral image analysis of debris flows for natural
hazard assessment. Geocarto International 12(1), 59-70.
- Butler, David R., 1997. Book reviews of "Geomorphic
Hazards", ed. by O. Slaymaker, and "Geomorphological Hazards
of Europe", ed. by C. Embleton and C. Embleton-Hamann. Geomorphology
21(2), 169-171.
- Butler, David R., 1997. Book review of "Grand Canyon,
A Century of Change: Rephotography of the 1889-1890 Stanton
Expedition", by Robert H. Webb. Journal of Geography 96(5),
270.
Finally,
in October Dave attended the National Council for Geographic
Education (NCGE) national meeting in Orlando, Florida, where
he received an NCGE Distinguished Teaching Achievement Award,
one of five university faculty in North America to receive such
an award. His dad also attended, and they thoroughly enjoyed
touring the space/rocket facilities at the Kennedy Space Center
and Cape Canaveral.
Antony
Orme,UCLA:
Antony
Orme has received two recent awards for research on which he and his
group are presently working, as follows:
- (a) $249,000 from the California Coastal Conservancy
and Environmental Protection Agency for interdisciplinary research
on Lower Malibu Creek and Malibu Lagoon leading to an improved
restoration and management plan for the lower basin. Orme is
co-PI with Rich Ambrose (Environmental Science & Engineering)
and is responsible for studies in the Holocene evolution and
contemporary processes operating in the system. As many people
know, the Malibu coast along the south shore of the Santa Monica
Mountains is a real basket case from the perspective of a natural
system distorted by enhanced fire, flood and storm-wave scenarios,
and further confounded by conflicting human demands which pit
developers against conservationists (what else is new?), Hollywood
glamor and unspeakable wealth against the needs of a lagoonal
ecosystem and the surfing community, and so on. The project
is designed to evaluate the range of physical and biological
processes operating within the system with a view to providing
a restoration and management plan that will meet all needs!!
Among the more interesting geomorphological aspects is the
relation between the water and sediment flux and the morphodynamics
of the barrier-lagoon system at the mouth of Malibu Creek.
The lagoon is a sump for fluvial and marine inputs and for
human waste (nice topic, you would think we would know better!), resulting
in frequent changes in system morphology, particularly as a
result of winter storms and surfer frustration. However, the
project is providing good support for several geography graduate
students whose careers may be made by their findings, even
as their health is broken.
- (b) $28,000 from the Waterways Experiment Station,
US Army Corps of Engineers, for an investigation of the Quaternary
Geomorphology of Rosamond Dry Lake in the western Mojave Desert,
California (that's right, waterways experiments in the desert,
why not!). Lake Rosamond formed part of a larger Lake Thompson
which included Lake Rogers during late Pleistocene time. It
desiccated in the Holocene but not before it left a suite of
subtle beach ridges and was blanketed by shifting dune fields.
The lake still receives storm runoff from the San Gabriel and Tehachapi
Mountains to the SW and NW respectively, but most low flows
are absorbed by the desert floor before reaching the lake.
So far, we have mapped some 30 morphosedimentary units in and
around the lake and have produced a draft map which will be
published shortly by the Corps of Engineers. Of particular
interest are the deflated ribs of a once impressive late Pleistocene
dune system, most of which has long since been removed downwind
to beyond Rogers Dry Lake (of SR1 and Space Shuttle fame).
Lake Rosamond is not Lake Bonneville but, if you look hard and have
faith, the subtle evidence for lake oscillations and alternating
wet and dry spells is quite inspiring! We may core shortly.
Graduate
students involved in this work include geographers Kenneth Schwarz,
Priya Finnemore, Mark Kuhlman, Andrew Kane and Caroline Tepley.
I am also pleased to announce that Jacqueline Gallagher obtained
her Ph.D. in 1996 for a dissertation on the Holocene evolution
of Morro Bay, California, and is now on the tenure track at Florida
Atlantic University; and that Richard Ford received his Ph.D.
in 1997 for a dissertation on contemporary delta sedimentation
and morphodynamics, using the Chorro delta as his field laboratory,
and is now teaching at Weber State University, Utah.
Terry
Toy, University of Denver.
Terry has been elected the president-elect of the American Society
for Surface Mining and Reclamation. He will become the president
of the National Executive Committee next year and a member of
that committee for the next three years.
Gerardo
Bocco, News from Morelia, Michoacan, Mexico.
We do geomorphology as a basis for landscape ecological mapping
and biodiversity assessments. we are specifically involved in
indigenous communties in the state of michoacan. in this context,
we carry out conventional geomorphological surveys as a tool
for land evaluation and spatial landscape segmentation for traditional
knowledge assessments. Ee use extensively remote sensing and
gis tools applied to land use change in temperate and tropical
forests in our region.
I
supervise a laboratory of geoecology in the department of natural
resources of the institute of ecology of the university of Mexico.
I hope my English has been understandable. Thanks, gerardo bocco
Gerardo Bocco <gbocco@miranda.ecologia.unam.mx>
Danny
Vaughn, Weber State University - Published:
- A Major Debris Flow Along the Wasatch Front in Northern
Utah, USA; Physical Geography Vol 18. No. 3
- Presented papers titled:
- Computer-Assisted Applications in Terrain Analysis
Geological Society of America National Meeting, Salt Lake City,
UT; October, 1997
- Planning and Analysis of a Water Quality Project
Using a GIS; Great Plains\Rocky Mountain Division; Association
of American Geographers Meeting Bozeman, MT September, 1997
Montclair
State University:
1) Zhaodong (Jordan) Feng, Co-PI of A NSF funded field workshop
on Interdisciplinary Earth Science Research Opportunities in
the Mongolian Repubic ($64,000) , took part in field work in
Mongolia with other five American scientists, in September,
1996. To develop a comprehensive project on "Eolian History
of the Mongolian Plateau", he will conduct a second field trip
to Mongolia this summer, funded by NSF ($10,500). These two
trips and associated lab work will lay foundations for him
and his colleague Gregory Pope and others to work on "Eolian Linkage
of the East Asian Monsoons between the Chinese and Mongolian Plateaus
during the Last Interglacial/glacial Cycle". Greg Pope conducted
weathering studies at a variety of historic and prehistoric
sites in Portugal last summer (1997). The goals of the project,
funded by pilot grants from Montclair State University, were
to 1) assess the weathering impacts on prehistoric petroglyphs
in the Vale do Coa of Northeast Portugal; 2) assess the impacts
of weathering on methods used to date petroglyphs; 3) ascertain
weathering rates on cut granitic building stone, and determine
microenvironmental factors responsible for variation. Papers
detailing the results of this research are forthcoming at the
1998 Boston AAG meeting, and 1998 Association for the Study of Marble
and Other Stones in Antiquity meeting, also in Boston.
Jack
Shroder, University of Nebraska at Omaha:
The Nanga Parbat Denudation Group (Jack Shroder, Michael Bishop,
Luke Copland, Kevin Cornwell, Dick Marston, Bill Phillips,
Valerie Sloan, and a host of other students) has returned from
a third year of work on a spectacular Himalayan peak with a
host of new information on surface processes. The arduous field
conditions not withstanding, new information was obtained on
a variety of interesting topics. Monsoon driven (summer precip)
glacier advances, rapid glacier and fluvial incision, intersting
mass-movement events, and exciting new techniques and results
in cosmogenic radionuclide dating, IRSL dating, analysis of
high resolution satellite imagery and the digital elevation model
all promise to produce new understandings of Himalayan geomorphology.
Work and funding efforts are already underway for a joint Anglo-American
Expedition to the western Himalaya two years hence.
Don
Friend, Mankato State University:
At Arizona State this past summer, Don Friend completed and successfully
defended his dissertation, entitled, "Evolution of Desert Colluvial
Boulder Fields, Eastern California." He immediately moved to
Mankato, Minnesota where he serves as Assistant Professor at
the real MSU, Mankato State University. When he arrived, the
department literally said to him, "we want you to do what you
do best." A most pleasant greeting as a new faculty member. Consequently,
Don has begun a field and hands-on oriented program in earth
surface processes. His course in Snow & Ice Processes this
winter quarter drew 40 students, 20 of whom went to Montana on
a week long field trip to complete their term projects. MSU has
10,000 undergraduates, 2,000 graduates, 175 geography majors,
25 geography MA/MS students, and 8 geography faculty (currently recruiting
a 9th). Don is the lone geomorphologist on campus but is well
supported by his colleagues in all departments. The geography
department includes a small but active climatology/meteorology
program, an excellent cartography and GIS program, a good old
Sauerian people-environment program, a geographic education program,
and several interdisciplinary programs including earth science
and earth science teaching. The department sponsors an active
student club, R.A.N.G.E. (Regional and National Geographic Exploration),
which will visit the upcoming AAG meeting in Boston. Don and
RANGE will also attend the upcoming FOP trip in northern Wisconsin.
Michigan
State University:
With the arrival of Alan Arbogast in 1995, eolian geomorphology
is a growing emphasis in the Department of Geography at Michigan
State University. Specific research areas include the Great Plains
(Kansas) and Michigan. Ongoing work in Kansas focuses on the
source area for dune sand on the Great Bend Sand Prairie in south-central
Kansas and the age of meander-belt dunes in the north-central
part of the state. In Michigan, research is being conducted on
coastal dunes along the Great Lakes and dune fields within the
interior of both peninsulas. Although coastal dunes are immense
(> 30 m tall), very little is known about their chronology and relationship
with the nearby lakes. Of particular interest are the large (forested)
dune fields that occur in the interior of the state, far (>
50 km) from the modern shoreline. In the past, these dunes have
been thought to be relict beach ridges that developed because
of fluctuating proglacial lakes or as a result of strong katabatic
winds in a deglacial environment. While each of these models
may have some factual basis, preliminary evidence suggests that
significant reactivation or initial mobilization occurred during
the Altithermal (middle Holocene). If this is further documented,
it would indicate that the dune fields are more sensitive to
climate change than previously believed.
Vatche
P. Tchakerian, Texas A&M:
Some recent publications by Texas A&M Geomorphologists:
- Chin, A. 1998, On the stability of step-pool mountain
streams, Journal of Geology, v. 106, p. 56-69.
- Phillips, J. D. 1998, Geomorphic and sedimentological
controls on the effectiveness of an extreme flood. Journal
of Geology, v.106, p. 87-95. With F.J. Magilligan, lead author,
B. Gomez, and L.A. James.
- Phillips, J. D. 1997, Floodplain sedimentation and
sensitivity, Earth Surface Processes and Landforms, v. 22,
p. 923-936. With B. Gomez, lead author, F.J. Magilligan, and
L.A. James.
- Phillips, J. D. 1997, Human agency, Holocene sea
level, and floodplain accretion in coastal plain rivers, Journal
of Coastal Research, v.13, p. 854-866.
- Phillips, J. D. 1997, A short history of a flat
place: Three centuries of geomorphic change in the Croatan,
Annals of the Association of American Geographers, v. 87, p.197-216.
- Phillips, J. D. 1997, Humans as geological agents
and the question of scale, American Journal of Science v. 297,
p. 98-115.
- Phillips, J. D. 1997, Simplexity and the reinvention
of equifinality, Geographical Analysis v. 29, p. 1-15.
- Phillips, J. D. 1997, Ferricrete formation in the
North Carolina Coastal Plain, Zeitschrift fur Geomorphologie,
v. 41, p. 67-81 With M. Lampe, R.T. King, M. Cedillo, R. Beachley,
and C. Grantham .
- Pease, P. and Gomez, B. 1997, Landscape development
as indicated by basin morphology and the magnetic polarity
of cave sediments, Crawford Upland, South-Central Indiana,
American Journal of Science, v. 297, p. 842-858.
- Tchakerian, V.P., Pease, P.P. and Tindale, N.W.
1997, Gemorphology and sediments of the Wahiba sand sea, Sultanate
of Oman, Supplementi Di Geografia Fisica e Dinamica Quaternaria,
v. III, p. 372-373.
- Tchakerian, V.P. 1997, The North American Deserts,
in D.S.G. Thomas (ed.), Arid Zone Geomorphology: Process, Form
and Change in Drylands, 2nd edition, London: John Wiley &
Sons, p. 523-541.
- Breed, C.S., McCauley, J.F., Whitney, M.I., Tchakerian,
V.P. and Laity, J.E. 1997, Wind erosion forms, in in D.S.G.
Thomas (ed.), Arid Zone Geomorphology: Process, Form and Change
in Drylands, 2nd edition, London: John Wiley & Sons, p.
437-464.
- Townsend, P.A. and Walsh, S.J. 1998, Modeling floodplain
inundation using an integrated GIS with radar and optical remote
sensing, Geomorphology, v. 21, p. 295-312.
Information on Meetings (past and present)
REVIEW
OF THE 1997 BINGHAMTON SYMPOSIUM: Jon Harbor, Purdue:
Changing the Face of the Earth: Engineering Geomorphology. The
28th Annual Binghamton Symposium was held in conjunction with
the 4th International Conference on Geomorphology at
the University of Bologna in Italy, 29-30 August 1997. Organized
by J.R. Giardino, R.A. Marston and the late Marie Morisawa, the
basic theme of the Symposium was to address the contributions
and challenges of engineering geomorphology. The symposium focused
on past accomplishments, current opportunities and future directions
in the role of geomorphologists and engineers in addressing resource
management problems. A diverse gourp of invited speakers provided
an international perspective on concepts and techniques in engineering
geomorphology in fluvial, hillslope, arid, periglacial, glacial,
tropical, coastal, and urban environments. Elsevier will publish
a volume in 1998 with 20 manuscripts (the speakers plus additional invited
papers), and the papers will also appear in Geomorphology. As
with past Binghamton volumes, this is sure to become a standard
reference in the field, and will be well worth reading.
I
won't provide exhaustive discussion of individual papers here
(get the book / journal for these). Rather, as a participant
in the symposium, I would stress the larger overall message the
symposium delivered. A number of common themes seemed to come
out of the wide-ranging discussion of the challenges and opportunities
for geomorphologists involved in real-world management problems
with a strong engineering component.
- 1.
Speakers addressing work done in all types of geomorphic environments
showed how a science-based understanding of geomorphic processes
and boundary conditions provides a critical part of the information
required to come up with an appropriate, cost-effective approach
to resource management.
- 2. Given #1, there are many important and exciting
new research directions geomorphologisits could be pursuing
to provide the information necessary for wise resource management.
- 3. Geomorphologists and engineers often approach
problems differently, each with preconceived notions and
standard approaches that may or may not be appropriate in
a specific case.
- 4. Collaborative work across the disciplinary
boundary has frustrations, but often yields solutions and
insights that neither side would have come up with individually.
- 5. Geomorphologists main contributions include
a good understanding of processes, spatial and temporal scale
and variability, and interactions between people and processes.
Their common failings include a lack of understanding of
regulatory and decision making processes, and a tendency
to suggest solutions that are great in theory but unworkable
in practical terms. However, there are good examples of geomorphologists
taking active roles in the development of new regulatory
approaches.
Overall,
this was an excellent and inspiring symposium that will hopefully
serve to focus attention on both research and applied work in
the critical area of engineering geomorphology.
Jon Harbor, Purdue University.
Kevin
Mulligan, Texas A&M: Texas Geomorphology Symposium
The first annual Texas Geomorphology Symposium was held in Junction,
Texas on January 29 and 30, 1998. The purpose of the conference
was to bring together a diverse group of professionals and scientists
from across the state who share a common interest in geomorphology
and surficial processes. The symposium was designed as an inexpensive
and informal gathering, taking advantage of the excellent facilities
at the Texas Tech University Center in Junction. Twenty speakers
presented research in five sessions over two days. The idea was
to provide a venue where the participants could present and discuss
their research activities in an casual and relaxed atmosphere
(e.g., Junction is presently outside of cellular telephone range).
On
the first day of the symposium Dr. J. Rick Giardino (Texas A&M)
welcomed the participants to the Texas Tech University Center.
In the first session the five papers focused on dust production
in the southern high plains (Thomas Gill, USDA/ARS), the nature
of soil landscape evolution (Jonathan Phillips, Texas A&M),
wind erosion within burned rangelands (John Stout, USDA/ARS),
planetary geomorphology (David Gywnn, Texas A&M) and the
global distribution of large inland deltas (Justin Wilkinson,
JSC/NASA). After dinner, the three papers in the second session focused
on engineering geology (Christopher Mathewson, Texas A&M),
zoogeomorphology in Texas (David Bulter, Southwest Texas State)
and a GIS model of channel migration (Jack Mills, University
of Texas at Tyler). At the end of the first day all of the participants
gathered under the stars around a bonfire on the banks of the
South Llano River.
On
the second day of the symposium there were three sessions. In
the first session the papers focused on the development of playa
basins in the southern high plains (Warren Wood, USGS), the geomorphic
variety of playas (Peter Briere, Texas A&M), a geomorphological
interpretation of a SPOT image in western Australia (John Degenhardt
and Peter Briere, Texas A&M) and current research ongoing
at the Canyon Research Natural Area at Big Bend National Park
(Keith Yarborough, Sul Ross State). In the second session papers
focused on the role of microorganisms in sandstone surface stabilization
(Harry Kurtz, Sam Houston State), the influence of clastic pipes
on sandstone landform evolution (Dennis Netoff, Sam Houston State),
a geomorphologistÆs role in the U.S. Joint Global Ocean
Flux Study (Patrick Pease, Texas A&M) and stream characteristics
of the San Miguel River in Colorado (Davis Jennings, Texas A&M).
In the last session of the symposium papers focused on wind flow
over a barchan (Kevin Mulligan, Texas A&M), wind erosion
in the dust bowl (Jeff Lee, Texas Tech) and aeolian processes
and landforms in the Mojave and Sonoran deserts (Vatche Tchakerian,
Texas A&M).
Following
the paper sessions the participants gathered to discuss future
plans. By all accounts the symposium was a great success and
there was overwhelming support for a second "Junction function".
The second annual Texas Geomorphology Symposium will be held
in Junction, Texas, on February 11, 12 and 13, 1999. The symposium
is sponsored by Texas A&M University through the Office of
the Vice President and Associate Provost for Graduate Studies,
the Department of Geography, and the Department of Geology and
Geophysics. The Texas conference is open to anyone with a strong
interest in geomorphology, and students are particularly encouraged
to attend and present their research. For more information on the
next conference contact the symposium organizer, Dr. J. Rick
Giardino at Texas A&M or check out the symposium web site
at http://geoweb.tamu.edu/~giardino/tx_geo.html.
Forthcoming
Meetings.
British
Geomorphological Research Group; David Higgitt, University of
Durham:
- April 14-18 GEOSCIENCE `98; Keele University. One
day symposium on: Palaeogeography of the Quaternary: Precise
Reconstruction of Environments Sponsored by British Geomorphological
Research Group, Marine Studies Group and Quaternary Research
Association. Contact convenor: Alastair Dawson (Coventry University)
email gex014@coventry.ac.uk
- May 1-4 20th BGRG Postgraduate Symposium; Queen's
University, Belfast. Contact: Eileen Kennedy, QUB; email BGRG98@qub.ac.uk; www http://web.qub.ac.uk/geosci/research/geography/bgrg20pgs.html
- May 17-19 BGRG Spring Field Meeting. Garrigill,
North Pennines. Contact: Jeff Warburton, (University of Durham).
email jeff.warburton@durham.ac.uk
- July 6-10 4th International Conference on Aeolian
Research ICAR-4 meeting in collaboration with BGRG and IGCP
349; University of Oxford. Contact Ian Livingstone (Nene College);
email ian.livingstone@nene.ac.uk;
www http://www.geog.ox.ac.uk/news/conference.html
- September 15-17 River Basin Systems: Archives of
Environmental Change. Fluvial Archives Group (FLAG) and BGRG
Cheltenham College of Higher Education. Contact Darren Maddy
(Cheltenham) email dmaddy@chelt.ac.uk
- September 18-20 BGRG Annual Conference "Tracers
in Geomorphology". Coventry University Contact: Ian Foster
(Coventry). email: gex002@coventry.ac.uk
- 9-10 November Coastal and Estuarine Environments
- Sedimentology, Geomorphology and Geoarchaeology. British
Sedimentological Research Group, British Geomorphological Research
Group and English Heritage. Contact Ken Pye email k.pye@reading.ac.uk
The
British Geomorphological Research Group produces
a newsletter (Geophemera) three times a year. Send
information about meetings to David Higgitt (University of Durham)
email d.l.higgitt@durham.ac.uk
For membership details contact Jill Labadz (University of Huddersfield)
email j.c.labadz@huddersfield.ac.uk
Web page: http://boris.qub.ac.uk/andy/bgrg/index.htm
Simulation Model Tony Parsons, Leicester University:
Simulating Slope Development
Slope
Development is one of 17 modules produced by GeographyCal in
association with the CTI Geography at Leicester University, UK.
The core of this module is a slope-development simulation program.
This program simulates the operation of four sets of processes:
mass movement, solution, wash and diffusion, and it can be used
in three main ways in the module. First, in Simulating Slopes
of the World, it can be used to consider the effects of different
climates and lithologies on slope development. This unit contains
a data bank of typical slope profiles from numerous locations
around the world. A particular hillslope can be selected and
the simulation program will show how we might expect this hillslope
to develop through time. Secondly, in Modelling Slope Processes, the
simulation program can be used to examine how different processes
and combinations of processes alter the speed of hillslope development
and the shape of the evolving hillslope. In addition, the user
can control the shape of the initial hillslope profile to examine
the effects of different initial forms on slope evolution. Finally,
in Exploring your own Slopes, the user can input a real slope
profile and some information on its climate and lithology, or
estimates of process rates, to see how a real hillslope (maybe
one that the user has measured in the field) will develop in
the future.
For
each of the three units described above, when the model is run
the module will show how the hillslope changes through time.
In addition, it keeps a record of the sequence of changes in
a gallery of slope profiles. Profiles from this gallery can be
extracted to a clipboard for pasting into a report. The module
also produces two tables, one giving numerical data on the change
to the slope profile form, the other records the development
of soil depth through time. The emphasis in this module is on
user choice. What the simulation program does is controlled by
choices the user makes. This means the module allows the user to explore
the effects of particular changes on slope development. What
happens to hillslope development if the profile if it is made
steeper, or longer, or bumpy? How would slope development change
if a basalt hillslope found in Peru were moved to Mali? Does
the importance of particular processes change through time? These
are typical of the questions that the module tries to encourage
the user to answer. The module is most effective when the tutor
asks students to use it to answer specific questions about slope
processes/development.
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