Earthflows in the Grondines and Trois Rivières Areas, Québec

1972 ◽  
Vol 9 (5) ◽  
pp. 561-573 ◽  
Author(s):  
P. F. Karrow
Keyword(s):  
River Valley ◽  
Time Span ◽  
Alluvial Deposits ◽  
Plant Matter ◽  
Close Proximity ◽  
High Precipitation ◽  
St Lawrence River

Extra-sensitive or quick clays are characteristic deposits of the Champlain Sea, which covered the St. Lawrence River valley about 11 000 years ago. Landslides of the earthflow type occur along many of the stream valleys. Rapid dissection and high precipitation are commonly associated with earthflows.Landforms characteristic of earthflows include bowls, slump slice ridges, pinnacles, inter-bowl ridges, and ribbing. Large earthflow complexes cover areas of several square miles, particularly just south of the St. Narcisse moraine. Earthflow debris spreads over alluvial deposits, many of which contain datable plant matter. Only a few prehistoric earthflows have been radiocarbon dated, but such data hold promise for the study of alluvial history and earthflow occurrence. At least two consecutive phases of earthflow activity have been noted in some areas, and a time span of several thousand years appears to be involved.Earthflows tend to occur in groups; historic flows in the area, including the classic St. Thuribe slide, have occurred in close proximity to older slides. Therefore certain slide-prone areas can be designated for planning purposes. It is advisable to avoid having building sites near present stream valleys.

Early Maize in Northeastern North America: A Comment on Emerson and Colleagues

2021 ◽  
Vol 86 (2) ◽  
pp. 425-427
Author(s):  
John P. Hart ◽  
William A. Lovis ◽  
M. Anne Katzenberg
Keyword(s):  
North America ◽  
Great Lakes ◽  
Empirical Evidence ◽  
River Valley ◽  
Human Bone ◽  
Northeastern North America ◽  
Isotopic Evidence ◽  
St Lawrence River

Emerson and colleagues (2020) provide new isotopic evidence on directly dated human bone from the Greater Cahokia region. They conclude that maize was not adopted in the region prior to AD 900. Placing this result within the larger context of maize histories in northeastern North America, they suggest that evidence from the lower Great Lakes and St. Lawrence River valley for earlier maize is “enigmatic” and “perplexing.” Here, we review that evidence, accumulated over the course of several decades, and question why Emerson and colleagues felt the need to offer opinions on that evidence without providing any new contradictory empirical evidence for the region.

Design, construction, and monitoring of a building with deep basements in Rome

2016 ◽  
Vol 53 (2) ◽  
pp. 210-224 ◽  
Author(s):  
G.M. Rotisciani ◽  
S. Miliziano ◽  
S. Sacconi
Keyword(s):  
Construction Process ◽  
Existing Buildings ◽  
Alluvial Deposits ◽  
The Poor ◽  
Water Wells ◽  
Congested Area ◽  
Safety Margins ◽  
Close Proximity ◽  
Design Construction

In this paper, excavations for the construction of a tall building with deep basements in a congested area in Rome, close to the Tiber river are described. The project was technically challenging due to the close proximity of existing buildings, the interaction with the river, and the poor geotechnical properties of the alluvial deposits. This well-documented case study addresses the geotechnical and structural issues involved in the development of the design and construction process. Particular attention is focused on the prediction of excavation-induced displacements and on the efficiency of the water wells introduced to increase safety margins against the hydraulic uplift of the excavation bottom.

Reproduction and Survival of Female Mallards in the St. Lawrence River Valley, New York

1995 ◽  
Vol 59 (1) ◽  
pp. 23 ◽  
Author(s):  
Michael P. Losito ◽  
Guy A. Baldassarre ◽  
Jeffrey H. Smith
Keyword(s):  
New York ◽  
River Valley ◽  
St Lawrence River

scholarly journals Geomorphological Assessment to Tract the Flow Evolution of Kali Putih, Srumbung District, Magelang Regency, Central Java, Indonesia

2020 ◽  
Vol 5 (1) ◽  
pp. 1-10
Author(s):  
Sari Bahagiarti Kusumayudha ◽  
I Made Oki Sanjaya ◽  
Helmy Murwanto ◽  
Sugeng Raharjo
Keyword(s):  
River Valley ◽  
River Channels ◽  
Alluvial Deposits ◽  
Merapi Volcano ◽  
White River ◽  
The Past ◽  
Central Java ◽  
Dry Valley ◽  
Flow Evolution ◽  
Upper Slope

Kali Putih (The White River) is located in Srumbung district, Magelang regency, Central Java, Indonesia. It is originated from the upper slope of Merapi volcano, flowing to the Southwest direction. Kali Putih belongs to one of the most channels where frequently flowed by lahar of Merapi volcano. Based on geomorphological and geological traces found at the surrounding of modern Kali Putih channel, this indicated that the flow of Kali Putih has undergone displacement several times. The position of ancient river valley in the past has changed into the modern river valley in the present time. The existence of ancient Kali Putih is exhibited by the presence of large dry valley morphology associated with volcanic blocks, gravels, and sand sized materials with various sorting, representing the characteristics of lahar and alluvial deposits. In the present time, the former river channels are currently used by local people for agricultural and fisheries land.

scholarly journals Citation Trend of Indian Physics and Astronomy Research during 2005 2020 through the Lens of Some New Indicators

2021 ◽  
Vol 42 (1) ◽  
pp. 30-37
Author(s):  
Gopinath Das ◽  
Bidyarthi Dutta ◽  
Anup Kumar Das
Keyword(s):  
Regression Analysis ◽  
Linear Regression ◽  
Research Output ◽  
Fundamental Equation ◽  
Temporal Variations ◽  
Time Span ◽  
Average Error ◽  
Regression Equations ◽  
Close Proximity ◽  
Coefficients Of Variations

The indicator Citation Swing Factor (CSF) has recently been developed to quantitatively measure the diffusion process from h-core zone to h-core excess zone. This paper calculated CSF for Indian physics and astronomy research output appeared in selective Indian journals since 2005 to 2020. The theoretical values of CSF are also calculated on the basis of its fundamental equation and same was compared it with the respective observed values. The average error over entire time span is found 2.26 per cent indicating close proximity between theoretically expected and practically observed values. Besides, three other scientometric indicators are introduced here, viz. Time-Normalised Total Cited Ratio (TC), Time-Normalised Cited Uncited Ratio (CU) and Time-Normalised Total Uncited Ratio (TU). Of these four indicators, the variation of TC is highest (1.76), followed by TU (0.53), CU (0.37) and CSF(E) (0.09), as evident from the values of respective Coefficients of Variations. The numerical values of these indicators are found out for the same sample and the temporal variations along with their mutual interrelationships are determined by regression analysis. It is observed that the three indicators, TC, CU and TU are mutually interrelated through the following linear regression equations, i.e. TC = -0.76 + 1.88*TU and CU = -0.201 + 0.34*TU.

La terminaison de l'axe de Vigny et la tectonique du meandre d'Acheres

1945 ◽  
Vol S5-XV (1-3) ◽  
pp. 127-140
Author(s):  
Jacques Bourcart ◽  
Robert Soyer
Keyword(s):  
River Valley ◽  
Seine River ◽  
Alluvial Deposits

Abstract Study of the stratigraphic and tectonic relations of strata underlying modern alluvial deposits and overlying the Cretaceous of the Acheres meander region in the Seine river valley, France, revealed by a series of borings, shows that the Vigny structural axis terminates at the Seine and that the Acheres meander is located in a synclinal trough.

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