 |
| Titel |
Understanding the factors influencing rill erosion on roadcuts in the south eastern region of South Africa |
| VerfasserIn |
K. E. Seutloali, H. R. Beckedahl |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1869-9510
|
| Digitales Dokument |
URL |
| Erschienen |
In: Solid Earth ; 6, no. 2 ; Nr. 6, no. 2 (2015-06-04), S.633-641 |
| Datensatznummer |
250115456
|
| Publikation (Nr.) |
 copernicus.org/se-6-633-2015.pdf |
|
|
|
|
|
| Zusammenfassung |
| 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. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|