Mass wasting and sediment storage in a small montane watershed: An extreme case of anthropogenic disturbance in the humid tropics

Author(s):  
Matthew C. Larsen ◽  
Abigail Santiago Román
Author(s):  
Lisa Tranel ◽  
Amber Ritchie ◽  
Meredith Strow

The Teton Mountains are shaped by interactions between glacial, fluvial and mass wasting processes. In this study we investigate the influence of process interactions on quantitative estimates of erosion rates based on sediment transport and accumulation. Sediment characteristics were measured on talus fan and stream channel deposits. These observations were used to evaluate weathering and rounding, which can indicate transport history and mixing between the two deposits and processes. Talus fans were studied to quantify the stability of fan surfaces and determine the frequency of material transport. Streams were studied to determine the efficiency of meltwater flow to move sand and coarser materials deposited on talus surfaces. Similarities between sediments in the fluvial and talus deposits support strong coupling between these processes. Streams are capable of moving smaller sized talus materials, however active rockfalls continue to supply new sediment and limit stream incision. The source of recent rockfalls appears to be ridges at high elevations or along north facing walls indicated by the frequency of surface weathering and lichen cover on selected talus fans.


2020 ◽  
Vol 21 (1) ◽  
pp. 22-55
Author(s):  
Bartosz Czepil

The objective of this paper is an attempt to explain the determinants of the lowest governance quality level in one of the communes of the Opolskie Province, Poland. The first stage of the research consisted in developing a commune-level governance quality index in order to measure the quality of governance in the 60 communes of the Opolskie Province. Subsequently, the commune with the lowest score in the index was qualified for the second stage of the research which was based on the extreme case method. The major conclusion from the research is that the commune leader's governance style which allowed him to hold on to power for many terms of office was responsible for generating low governance quality. Furthermore, the low quality of governance was not only the effect of the governance style but also the strategy aimed at remaining in the commune leader office for many terms.


2015 ◽  
Vol 11 (1) ◽  
pp. 69-84 ◽  
Author(s):  
Hannah Shipman ◽  
Srikant Sarangi ◽  
Angus J. Clarke

The motivations of those who give consent to bio-banking research have received a great deal of attention in recent years. Previous work draws upon the notion of altruism, though the self and/or family have been proposed as significant factors. Drawing on 11 interviews with staff responsible for seeking consent to cancer bio-banking and 13 observations of staff asking people to consent in routine clinical encounters, we investigate how potential participants are oriented to, and constructed as oriented to, self and other related concerns (Author 2007). We adopt a rhetorical discourse analytic approach to the data and our perspective can be labelled as ‘ethics-in-interaction’. Using analytic concepts such as repetition, extreme case formulation, typical case formulation and contrast structure, our observations are three-fold. Firstly, we demonstrate that orientation to ‘general others’ in altruistic accounts and to ‘self’ in minimising burden are foregrounded in constructions of motivation to participate in cancer bio-banking across the data corpus. Secondly, we identify complex relational accounts which involve the self as being more prominent in the consent encounter data where the staff have a nursing background whereas ‘general others’ feature more when the staff have a scientific background. Finally, we suggest implications based on the disparities between how participants are oriented in interviews and consent encounters which may have relevance for developing staff’s reflective practice.


2008 ◽  
Vol 40 (4) ◽  
pp. 18-27
Author(s):  
Irina A. Borisova ◽  
Nikolay G. Zagoruiko
Keyword(s):  

1973 ◽  
Vol 37 (4) ◽  
pp. vi-vi
Author(s):  
Frank G. Calhoun
Keyword(s):  

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