scholarly journals Understanding the factors influencing rill erosion on roadcuts in the south eastern region of South Africa

Solid Earth ◽  
2015 ◽  
Vol 6 (2) ◽  
pp. 633-641 ◽  
Author(s):  
K. E. Seutloali ◽  
H. R. Beckedahl

Abstract. Erosion on roadcuts is a concern due to the potential of causing environmental degradation, which has significant economic costs. It is therefore critical to understand the relationship between roadcut characteristics and soil erosion for designing roadcuts that are less vulnerable to erosion and to help road rehabilitation works. This study investigated the characteristics (i.e. gradient, length, percentage of vegetation cover and soil texture) of degraded (i.e. with rills) and non-degraded roadcuts (i.e. without rills) and explored the relationship of the roadcut characteristics with the dimensions (widths and depths) of the rills. Degraded roadcuts were steep (52.21°), long (10.70 m) and had a low percentage of vegetation cover (24.12) when compared to non-degraded roadcuts which had a gradient of 28.24°, length of 6.38 m and 91.7% of vegetation cover. Moreover, the gradient and percentage of vegetation cover of the roadcut significantly determine the rill dimensions. The widths and depths of the rills increase with the increase in slope gradient and decrease with an increase in percentage of vegetation cover. Moreover, the widths and depths of the rills decreased downslope of the roadcuts. Based on these results, re-vegetation of roadcuts as well as construction of gentle gradients could minimise rill erosion and hence the negative on-site and off-site effects.

2015 ◽  
Vol 7 (1) ◽  
pp. 393-417
Author(s):  
K. E. Seutloali ◽  
H. R. Beckedahl

Abstract. Erosion on roadcuts is a concern due to potential to cause environmental degradation which has significant economic costs. It is therefore critical to understand the relationship between roadcut characteristics and soil erosion for designing roadcuts that are less vulnerable to erosion and to help road rehabilitation works. This study investigated the characteristics (i.e. gradient, length and percentage of vegetation cover) of degraded (i.e. with rills) and non-degraded roadcuts (i.e. without rills) and explored the relationship of the roadcut characteristics with the dimensions (widths and depths) of the rills. Degraded roadcuts were steep (52.21°), long (10.70 m), and had a low percentage of vegetation cover (24.12) when compared to non-degraded roadcuts which had a gradient of 28.24°, length of 6.38 m and 91.7% of vegetation cover. Moreover, the gradient and percentage of vegetation cover of the roadcuts significantly determined the rill dimensions. The widths and depths of the rills increased with the increase in slope gradient and decreased with an increase in percentage of the vegetation cover. Moreover, the widths and depths of the rills decreased downslope of the roadcuts. Based on these results, re-vegetation of roadcuts as well as construction of gentle gradients could minimise rill erosion and hence the negative onsite and offsite effects.


2018 ◽  
Vol 55 (1) ◽  
pp. 149-165
Author(s):  
Khekheti Makhudu

Having written and compiled from memory, over 700 Setswana proverbs when he was briefly resident in London, around the 1900s, Sol T. Plaatje exhibited unusual ethnographic knowledge and remarkable, creative translation skills in diaspora-like circumstances.  While most literary researchers attest to those achievements, few have been the theories that account sufficiently for Plaatje's multilingual proverb renditions. The view propounded here is that Plaatje's paremiological enterprise was probably never only an exercise of his polyglot abilities. Rather his quest appears to have been to assert the cultural similarities and convergences between African and European people's histories.  His socio-political beliefs propelled deep pride over his Setswana identity and became the driving force for highlighting the human bonds among nations of the North and the South. For Plaatje, seeing the overlaps and equivalences in and through the proverbs of the Dutch, English, French, Germans and the Batswana peoples, firstly validated orality as the bedrock of modern literary expression.  Secondly, the relationship of the two seemed to recapitulate the communicative connections among people and their languages, across time and space. Lastly, the paper makes the point that Plaatje's search for unity in the cultural diversity as exhibited in his 1916 Diane tsa Setswana collection and the 1924 A Sechuana Reader stories, provides instructive lessons that present-day South Africa would ill afford to ignore considering the social cohesion challenges the nation faces.


2021 ◽  
Vol 12 (01) ◽  
Author(s):  
Riley Carpenter ◽  
◽  
Lily Roos ◽  

The South African accounting profession needs racial transformation. Consequently, students pursuing the chartered accountant (South Africa) (CA(SA)) designation, especially at-risk Black students, require adequate support. To be successful, the support must be driven by factors influencing students’ academic performance. As prior academic performance is one such factor, this study examines the relationship between the National Senior Certificate (NSC) exams and the National Benchmark Test (NBT) for students enrolled in an accounting degree at a South African university. Due to numerous moderate and strong correlations between NSC and NBT results, without multicollinearity, it was concluded that both sets of results should be considered as factors contributing to students’ academic performance. The findings highlight the need for further empirical research on NSC and NBT results as determinants of success for accounting students.


1984 ◽  
Vol 22 (4) ◽  
pp. 617-632 ◽  
Author(s):  
Brian M. Du Toit

This article discusses the relationship of missionaries and anthropologists in South Africa. Due to such important factors as ethnicity, linguistic group membership, denominationalism, and party political affiliation, it is essential to present historical perspectives on these and related matters. The vocation of missionary is almost exclusively a white enterprise as is that of professional anthropologist. Blacks have however had significant influences in both realms and are today entering these vocations.


1998 ◽  
Vol 18 ◽  
pp. 3-19 ◽  
Author(s):  
Tony Lynch

Research into listening over the past three decades has, above all, highlighted the fundamental intricacy of the processes involved. In order to make sense of spoken messages, listeners may need to integrate information from a range of sources: phonetic, phonological, prosodic, lexical, syntactic, semantic, and pragmatic. The fact that we achieve all this in real time as the message unfolds makes listening “complex, dynamic, and fragile” (Celce-Murcia 1995:366). In this review I consider research into four aspects of these complexities: processes (e.g., speech recognition, discourse comprehension, and memory); the role of context; factors influencing listening; and the relationship of listening with other language skills. Finally I suggest likely directions for future research into listening.


1962 ◽  
Vol 94 (8) ◽  
pp. 809-818 ◽  
Author(s):  
H. A. Tripp

Studies on the parasites of the Swaine jack pine sawfly, Neodiprion swainei Midd., form part of an extensive program designed to assess the factors influencing population dynamics of this important defoliator of jack pine, Pinus banksiana Lamb. Investigations were carried out in the Province of Quebec between 1955 and 1959 near the headwaters of the Gatineau River, Abitibi County, and continued during 1960 and 1961 near the source of the Vermillion River, County Laviolette. In both areas, one of the principal parasites associated with N. swainei was the tachinid, Spathimeigenia spinigera Townsend. Descriptions of the immature stages of this parasite, and details of its behaviour were published previously (Tripp, 1960).


2017 ◽  
Vol 18 (7) ◽  
pp. 621-638
Author(s):  
Camilo Diaz Pino

Amid a global cultural landscape defined both by the ambiguities of deterritorialization and the persistent impact of established geopolitical hierarchies, the idea of cultural reflux offers a potent tool to conceptualize and lend context to the study of nascent peripheral and semiperipheral media industries. Dialoguing with Thussu and Iwabuchi’s work on media flow as well as Curtin’s concept of media capitals, this article proposes to analyze “mockbusters”: derivative copies of established metropolitan media properties. I specifically look at the output of the Brazilian studio Video Brinquedo, infamous in the 2000s for its blatant, low-quality copies of established children’s media properties. In examining the BRICS (Brazil, Russia, India, China, and South Africa) mockbuster as a case study of opportunistic media counterflow, the idea of cultural reflux complicates debates over where we should situate our analytical objectives with respect to mediatic peripherality, and how we can more concretely examine the relationship of media flow to transnational imperial frameworks.


Many colleges experience increase in attrition and it has great impact on the performance of the colleges. Objective of this study is to find why employee are leaving their job and propose retention initiatives. The research instrument used to obtain data was questionnaire. A total 200 employees are there in the college. By using random sampling a total of 140 employees were interviewed using questionnaires. Correlation analysis is used to test the inter correlation between the variable. Correlation result shows that the two variables of motivation and job satisfaction were correlated with employee retention in the college. Same tool has been used to determine the relationship between the variables namely the relationship of the management with the staff and the factors influencing this relationship to grow stronger. Results indicate attrition is associated with compensation provided for the additional working hours to the staff and their selection process. These findings clearly indicate that in order to retain the best talented employees in the college, taking care of the employees by having good relationship with them is a must.


Author(s):  
Ma De Los Ángeles Velasco-Hernández ◽  
Tomás Morales-Acoltzi ◽  
Miguel Ángel García-Castro ◽  
Rogelio Bernal-morales ◽  
Joaquín Zagoya-Martínez ◽  
...  

Ocean-atmospheric interactions have effects at different scales; forming microclimates, which can explain variations with climatic or natural anomalies, between meteorological processes. This research analyzes and identifies the relationship of the teleconnection hydrometeorological effects, which determine the distribution of precipitation in corn yield. The data were used from a semi-structured interview directed to corn producers, where seven years of case studies were identified for the eastern region of the state of Puebla, Mexico. The Graphics were made with “pentad scale distribution”. The results show the importance of geographical location for agricultural activities in relation to a valley with altitudinal gradient. In addition, the corn growth cycle is associated with tropical disturbances from east Puebla region as well as Hurricane activity. It was identified that the relationship of teleconnections and the distribution of rainfall are main factors that influence in the development good or bad of corn, showed in the yields, where the different phases of ENSO (EL NIÑO Southern Oscillation) have a differentiated impact on the availability of precipitation in this case studies of the present investigation.


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