scholarly journals Assessing the determinants of rill erosion on roadcuts in the south eastern region of South Africa

2015 ◽  
Vol 7 (1) ◽  
pp. 393-417
Author(s):  
K. E. Seutloali ◽  
H. R. Beckedahl
Keyword(s):  
South Africa ◽  
Soil Erosion ◽  
Environmental Degradation ◽  
Vegetation Cover ◽  
Eastern Region ◽  
Rill Erosion ◽  
Economic Costs ◽  
Slope Gradient ◽  
Relationship Of ◽  
The Relationship

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.

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
Keyword(s):  
South Africa ◽  
Vegetation Cover ◽  
Site Effects ◽  
Eastern Region ◽  
Rill Erosion ◽  
Economic Costs ◽  
Slope Gradient ◽  
Factors Influencing ◽  
Relationship Of ◽  
The Relationship

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.

scholarly journals Sol T. Plaatje's paremiological quest: a common humanity in cultural diversity

2018 ◽  
Vol 55 (1) ◽  
pp. 149-165
Author(s):  
Khekheti Makhudu
Keyword(s):  
South Africa ◽  
Cultural Diversity ◽  
Driving Force ◽  
Common Humanity ◽  
Literary Expression ◽  
Political Beliefs ◽  
The North ◽  
The Social ◽  
Relationship Of ◽  
The Relationship

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.

Missionaries, Anthropologists, and the Policies of the Dutch Reformed Church

1984 ◽  
Vol 22 (4) ◽  
pp. 617-632 ◽  
Author(s):  
Brian M. Du Toit
Keyword(s):  
South Africa ◽  
Group Membership ◽  
Political Affiliation ◽  
Dutch Reformed ◽  
Historical Perspectives ◽  
Linguistic Group ◽  
Reformed Church ◽  
Relationship Of ◽  
The Relationship ◽  
Dutch Reformed Church

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.

Flows in Reflux: Video Brinquedo and the BRICS “Mockbuster” as a Glitch in Mediatic Hegemony

2017 ◽  
Vol 18 (7) ◽  
pp. 621-638
Author(s):  
Camilo Diaz Pino
Keyword(s):  
South Africa ◽  
Cultural Landscape ◽  
Media Industries ◽  
Children's Media ◽  
Relationship Of ◽  
The Relationship

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.

scholarly journals Effects of Atlantic and Pacific Ocean Teleconnections on Corn Yield East of Puebla, Mexico: Case Studies

2021 ◽  
pp. 85-99
Author(s):  
Ma De Los Ángeles Velasco-Hernández ◽  
Tomás Morales-Acoltzi ◽  
Miguel Ángel García-Castro ◽  
Rogelio Bernal-morales ◽  
Joaquín Zagoya-Martínez ◽  
...  
Keyword(s):  
Case Studies ◽  
Southern Oscillation ◽  
Geographical Location ◽  
Structured Interview ◽  
Growth Cycle ◽  
Corn Yield ◽  
Eastern Region ◽  
Hurricane Activity ◽  
Relationship Of ◽  
The Relationship

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.

scholarly journals Effects of vegetation cover and slope on soil erosion in the Eastern Chinese Loess Plateau under different rainfall regimes

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e11226
Author(s):  
Congjian Sun ◽  
Huixin Hou ◽  
Wei Chen
Keyword(s):  
Soil Erosion ◽  
Loess Plateau ◽  
Water Conservation ◽  
Vegetation Cover ◽  
Interactive Effects ◽  
Chinese Loess Plateau ◽  
Slope Gradient ◽  
Chinese Loess ◽  
Sediment Yields ◽  
Erosion Processes

Soil erosion is a critical environmental problem of the Chinese Loess Plateau (CLP). The effects of vegetation cover on soil erosion reduction under different rainfall types are not well understood especially in the eastern Chinese Loess Plateau (ECLP). In this study, we monitored runoff and sediment yield at the Fengjiagou water and soil conservation station with five types of vegetation cover (arbor trees (ARC), shrubs (SHC), arable (ABC), natural vegetation (NVC), and artificial grass (APC)) and three slope gradients (10°, 15°, and 20°) in the ECLP. Based on long-term monitoring data, five rainfall types were classified by the maximum 30 min rainfall intensity (I30). We also quantitatively revealed the interactive effects of different types precipitation, vegetation cover and slope gradients on regional soil erosion. The results showed that (1) The RII (13 times) and RIII (eight times) type are the most threatening erosive rainfall in this region. (2) The ARC and SHC type were most beneficial for soil and water conservation in the ECLP; The APC and ABC are not conductive to the prevention of regional soil erosion. (3) Runoff and sediment yields increased with the slope gradient. The farmland is vulnerable to soil erosion when the slope gradient exceeds 10°. The results of this study can improve the understanding of regional soil erosion processes on the ECLP and provide useful information for managing regional water and land resources.

scholarly journals Effects of the Imposter Phenomenon on Measures of Assertiveness in Female Professionals in South Africa

2018 ◽  
Vol 41 ◽  
pp. 46-56
Author(s):  
Lyapa Nakazwe-Masiya ◽  
Gavin Price ◽  
Karl Hofmeyr
Keyword(s):  
South Africa ◽  
Negative Relationship ◽  
Business Leaders ◽  
Job Functions ◽  
Imposter Phenomenon ◽  
Internal Experience ◽  
Female Professionals ◽  
Relationship Of ◽  
Industry Sectors ◽  
The Relationship

Assertiveness is arguably one of the strongest predictors of success among business leaders and professionals. The study focuses on imposter phenomenon (IP), which occurs when an individual, normally considered to be a high achiever, undergoes an internal experience of feeling like an intellectual fraud or experiences a fear of failure upon achieving success, and the relationship of IP with assertiveness. Due to an absence of research on the relationship between IP and assertiveness, particularly in professionals in South Africa, this study investigates the way these two variables relate to each other. The purpose of this study is to 1) investigate whether IP is prevalent in female professionals in South Africa, 2) investigate whether IP and assertiveness are correlated and 3) determine whether IP is a predictor of assertiveness. The study was conducted on working professionals in South Africa (N = 165) and questionnaires were distributed online. The instruments used were the Clance Imposter Phenomenon Survey and elements of the Adaptive and Aggressive Assertiveness Scales. The professionals assessed were drawn from different industry sectors and across all job functions. The results suggest that IP is prevalent in professionals in South Africa and bears a moderately negative relationship to assertiveness. Another finding was that IP is a negative predictor of assertiveness. Gender also had an effect on the relationship between the two variables; the relationship was only found to be significant among women when the sample was split.

scholarly journals Considering the relationship of slope and soil loss on skid trails in the north of Iran (a case study)

2013 ◽  
Vol 59 (No. 9) ◽  
pp. 339-344 ◽  
Author(s):  
M. Akbarimehr ◽  
H. Jalilvand
Keyword(s):  
Soil Loss ◽  
Rainfall Intensity ◽  
Forest Harvesting ◽  
Slope Gradient ◽  
Slope Length ◽  
The North ◽  
North Of Iran ◽  
Relationship Of ◽  
The Relationship

With increasing mechanization of forest harvesting operations the impacts on soil have increased quite dramatically. The objective of this paper was to examine the relationship of slope and soil loss. This research was carried out in parcels 14 and 26 of the third district of Nav-Asalem forest in the north of Iran. Erosion plots were 75, 150 and 225 m<sup>2</sup> with two slope classes. After each rainfall event the amount of runoff was measured; then, a sample was taken to determine the weight of soil loss. The results of correlation analysis by Pearson&rsquo;s test between soil loss and slope classes, soil loss and slope length showed that there was a significant (P &lt; 0.05) and positive correlation between the mentioned factors. Also, linear regression between soil loss, slope length and slope gradient was significant. It could be concluded that studying and underlying factors that increase soil loss such as soil type, rainfall intensity, should also be taken into consideration in future. Skid trail construction and skidding should be limited to the slope of &lt; 20%; machine traffic should be restricted. The above-mentioned conclusions can be applied to proper harvesting and management of forest ecosystems.&nbsp; &nbsp;

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