scholarly journals Late Cenozoic evolution of the Upper Amargosa river drainage system, southwestern Great Basin, Nevada and California

1988 ◽  
Author(s):  
N.K. Huber
Keyword(s):  
Great Basin ◽  
Drainage System ◽  
Late Cenozoic ◽  
River Drainage

scholarly journals Late Cenozoic Denudation and Topographic Evolution History of the Lhasa River Drainage in Southern Tibetan Plateau: Insights From Inverse Thermal History Modeling

2021 ◽  
Vol 9 ◽  
Author(s):  
Dongxu Cai ◽  
Xianyan Wang ◽  
Guangwei Li ◽  
Wenbin Zhu ◽  
Huayu Lu
Keyword(s):  
Tibetan Plateau ◽  
Surface Erosion ◽  
The Tibetan Plateau ◽  
Monsoon Precipitation ◽  
Late Cenozoic ◽  
River Drainage ◽  
History Of ◽  
Southern Tibetan Plateau ◽  
Lhasa River ◽  
Topographic Evolution

The interaction of surface erosion (e.g., fluvial incision) and tectonic uplift shapes the landform in the Tibetan Plateau. The Lhasa River flows toward the southwest across the central Gangdese Mountains in the southern Tibetan Plateau, characterized by a low-relief and high-elevation landscape. However, the evolution of low-relief topography and the establishment of the Lhasa River remain highly under debate. Here, we collected thermochronological ages reported in the Lhasa River drainage, using a 3D thermokinematic model to invert both late Cenozoic denudation and relief history of the Lhasa River drainage. Our results show that the Lhasa River drainage underwent four-phase denudation history, including two-stage rapid denudation at ∼25–16 Ma (with a rate of ∼0.42 km/Ma) and ∼16–12 Ma (with a rate of ∼0.72 km/Ma). In the latest Oligocene–early Miocene, uplift of the Gangdese Mountains triggered the rapid denudation and the formation of the current main drainage of the Lhasa River. In the middle Miocene, the second stage of the rapid denudation and the high relief were associated with intense incision of the Lhasa River, which is probably due to the enhanced Asian summer monsoon precipitation. This later rapid episode was consistent with the records of regional main drainage systems. After ∼12 Ma, the denudation rate decreases rapidly, and the relief of topography in the central Gangdese region was gradually subdued. This indicates that the fluvial erosion resulting from Asian monsoon precipitation increase significantly impacts on the topographic evolution in the central Gangdese region.

scholarly journals How a New Paradigm Explains Topographic Map Drainage System and Erosional Landform Evidence in the Fremont County Royal Gorge Area, Colorado, USA

2021 ◽  
Vol 13 (2) ◽  
pp. 32
Author(s):  
Eric Clausen
Keyword(s):  
Drainage Basin ◽  
Ice Sheet ◽  
Drainage System ◽  
United States Geological Survey ◽  
Topographic Map ◽  
Glacial History ◽  
The South ◽  
New Paradigm ◽  
Arkansas River ◽  
River Drainage

A new Cenozoic geologic and glacial history paradigm (new paradigm) describes massive and prolonged continental ice sheet meltwater floods that eroded the Colorado Royal Gorge area and surrounding regions and which were diverted in east, northeast, and even north directions as uplift of a thick ice sheet created deep “hole” rim gradually occurred (the thick ice sheet was located where North American ice sheets are usually recognized to have existed). A deep “hole” rim segment followed what is now the northern and central Colorado east-west continental divide southward to the Arkansas River headwaters area and then continued south along the Sangre de Cristo Mountains crestline to at least the Purgatoire River-Canadian River drainage divide and may have continued east from that point along a less well-defined zone beginning with what is now the Purgatoire River-Canadian River drainage divide. Diverging and converging valley complexes, barbed tributaries, and Arkansas River and other drainage route direction changes (easily seen on United States Geological Survey detailed topographic maps) are interpreted to have developed as the south-oriented floodwaters first flowed across the rising deep “hole” rim to reach the south- and southeast-oriented Rio Grande River drainage basin and were subsequently blocked by deep “hole” rim uplift and diverted to flow in east, northeast, and north directions. The accepted Cenozoic geologic and glacial history paradigm (accepted paradigm) has to date been unable to satisfactorily explain the detailed topographic map drainage system and erosional landform evidence and the new and accepted paradigms are incommensurable and lead to quite different Cenozoic geologic and glacial histories.

scholarly journals Enchentes no Rio de Janeiro: efeitos da urbanização no Rio Grande (arroio fundo) - Jacarepaguá

1996 ◽  
Vol 19 ◽  
pp. 79-92
Author(s):  
Francisco Pontes de Miranda Ferreira ◽  
Sandra Baptista da Cunha
Keyword(s):  
Urban Development ◽  
Urban Areas ◽  
Rio De Janeiro ◽  
Drainage System ◽  
Rio Grande ◽  
Direct Relation ◽  
River Channels ◽  
River Drainage ◽  
Engineering Work

Human participation as an agent in the modification of hydrologie conditions in urban areas has a direct relation with the processes of erosion, deposition and transport of material in river channels. Engineering work as deepening and rectification of the channel and modification in the surrounding vegetation, cause important impacts. The urban development of Jacarepagua and Barra da Tijuca districts has been causing alterations in the Grande river drainage system. In February of 1996, the flooding of the Grande river provoked more than 30 deaths, leaving hundreds of people homeless.

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