A Consistent Framework for Modelling Geomorphic Processes and Landform Evolution

2013 ◽  
pp. 95-102 ◽  
Author(s):  
M.J. Kirkby
Keyword(s):  
Landform Evolution ◽  
Geomorphic Processes

scholarly journals The Potential Applications of Optical Dating to the Sandy Uplands of East Texas and Northwest Louisiana

1998 ◽  
Author(s):  
Charles D. Frederick ◽  
Mark D. Bateman
Keyword(s):  
Organic Matter ◽  
Radiocarbon Dating ◽  
Sandy Soils ◽  
Buried Soils ◽  
East Texas ◽  
Optical Dating ◽  
Landform Evolution ◽  
Sediment Transportation ◽  
Potential Applications ◽  
Geomorphic Processes

The fine, sandy soils of East Texas and Northwest Louisiana have been the source of archaeological debate for some time. This discourse concerns the mode of burial of cultural material in the easily eroded soils and the mechanics of recent (Holocene) landform evolution. Because these deposits are typically well-drained, organic matter does not preserve well, thus hindering the dating of the geomorphic events that figure prominently in their development and the prehistoric occupations which lie buried throughout uplands of this region. A relatively new dating technique, optical dating, has much to offer this region and the archaeological community as it measures the period of time that has elapsed since sand grains were last exposed to sunlight. Hence, it directly dates the time of sediment transportation and deposition. This method is therefore applicable to a number of archaeological and geomorphic processes which may not be dated by traditional methods, owing to the lack of organic matter suitable for radiocarbon dating. In geomorphic contexts, optical dating may be preferred over radiocarbon as it directly dates the time of sedimentation rather than the age of organic matter in features such as buried soils that may be significantly different from the geomorphic event which fossilized the soil.

LINKS BETWEEN GEOMORPHIC PROCESSES, CLIMATE, AND HUMAN SETTLEMENT IN THE ISLANDS OF THE FOUR MOUNTAINS, ALASKA

2016 ◽  
Author(s):  
Lyman P. Persico ◽  
◽  
Henry R. Lanman ◽  
Kirsten P. Nicolaysen ◽  
Dixie L. West ◽  
...  
Keyword(s):  
Human Settlement ◽  
Geomorphic Processes

scholarly journals Geomorphic effects of recurrent outburst superfloods in the Yigong River on the southeastern margin of Tibet

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Kaiheng Hu ◽  
Chaohua Wu ◽  
Li Wei ◽  
Xiaopeng Zhang ◽  
Qiyuan Zhang ◽  
...  
Keyword(s):  
Landslide Dam ◽  
Upstream Migration ◽  
One Dimensional ◽  
Landform Evolution ◽  
Outburst Floods ◽  
Stepwise Method ◽  
Large Landslide ◽  
Southeastern Margin ◽  
Channel Slope ◽  
The One

AbstractLandslide dam outburst floods have a significant impact on landform evolution in high mountainous areas. Historic landslide dams on the Yigong River, southeastern Tibet, generated two outburst superfloods > 105 m3/s in 1902 and 2000 AD. One of the slackwater deposits, which was newly found immediately downstream of the historic dams, has been dated to 7 ka BP. The one-dimensional backwater stepwise method gives an estimate of 225,000 m3/s for the peak flow related to the paleo-stage indicator of 7 ka BP. The recurrence of at least three large landslide dam impoundments and super-outburst floods at the exit of Yigong Lake during the Holocene greatly changed the morphology of the Yigong River. More than 0.26 billion m3 of sediment has been aggraded in the dammed lake while the landslide sediment doubles the channel slope behind the dam. Repeated landslide damming may be a persistent source of outburst floods and impede the upstream migration of river knickpoints in the southeastern margin of Tibet.

scholarly journals Legacy of Human Impact on Geomorphic Processes in Mountain Headwater Streams in the Perspective of European Cultural Landscapes

Geosciences ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 253
Author(s):  
Tomáš Galia
Keyword(s):  
Human Impact ◽  
Cultural Landscapes ◽  
Headwater Streams ◽  
Timber Harvesting ◽  
Anthropogenic Pressure ◽  
Catchment Scale ◽  
Morphological Response ◽  
Mountain Ranges ◽  
Outer Western Carpathians ◽  
Geomorphic Processes

Mountain headwater streams are still somewhat on the boundary of interest regarding possible human impact on their morphology or geomorphic processes, which may be caused by our perception of mountains as islands of relatively preserved natural conditions. This paper summarizes the past and present human pressure on the headwater streams that drain the highest mountain ranges of the Outer Western Carpathians in Czechia. Anthropogenic pressure began in this region in the 16th century during a colonization of the mountains and continued by timber harvesting, timber floating, and construction of torrent control works until present. Each of these interventions produced a morphological response of the channels in relation to altered sediment or water fluxes at the whole catchment scale or within longitudinal stream profiles. Because it is highly unlikely to reach pre-settlement conditions of the channels, the management effort should be concentrated to achieve realistic restoration targets under the present socioeconomic circumstances by taking into consideration the morphodynamical specifics of mountain headwater streams.

Role ofin situ cosmogenic nuclides10be and26al in the study of diverse geomorphic processes

1993 ◽  
Vol 18 (5) ◽  
pp. 407-425 ◽  
Author(s):  
K. Nishiizumi ◽  
C. P. Kohl ◽  
J. R. Arnold ◽  
R. Dorn ◽  
I. Klein ◽  
...  
Keyword(s):  
Geomorphic Processes
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