The effect of slope steepness on soil erosion

The degree and length of the slope are two essential features of topography in relation to runoff and soil erosion. Dunne (1977) observed that topographic steepness is a significant factor effecting sediment yields. Soil losses can be expected to increase with slope length and steepness as a result...

Full description

Bibliographic Details
Main Authors: Ali, Mohd Fozi, Said, Salim
Format: Conference or Workshop Item
Language:English
Published: 1999
Online Access:http://psasir.upm.edu.my/id/eprint/38453/1/38453.pdf
_version_ 1825949229181304832
author Ali, Mohd Fozi
Said, Salim
author_facet Ali, Mohd Fozi
Said, Salim
author_sort Ali, Mohd Fozi
collection UPM
description The degree and length of the slope are two essential features of topography in relation to runoff and soil erosion. Dunne (1977) observed that topographic steepness is a significant factor effecting sediment yields. Soil losses can be expected to increase with slope length and steepness as a result of respective increases in volume and velocities of surface runoff. Steep slopes are often susceptible to landslides even under forest conditions and such slope become more susceptible to erosion once disturbed. The observations of this study will be made using the Soil Erosin Gauge (Baharuddin, 1995) on three categories of slopes; gentle, moderate, and steep slopes. Previous studies had concluded that the relation between slope steepness and soil loss was curvilinear. Investigation by Zingg (1940) showed that the relationship between steepness of slope and soil erosion could be represented by the power equation y = axb where b is 1.49, a is 0.065, x is the percent of slope steepness and y is the coded weight of soil loss. The USLE slope steepness factor was developed (Wischmeier and Smith, 1978) by the equation S = 65.41sin20 + 4.56sin0 + 0.065 where 0 is the angle of slope steepness in degrees. The percent slope factor is also known to interest with management practices such as contouring and terracing.
first_indexed 2024-03-06T08:41:21Z
format Conference or Workshop Item
id upm.eprints-38453
institution Universiti Putra Malaysia
language English
last_indexed 2024-03-06T08:41:21Z
publishDate 1999
record_format dspace
spelling upm.eprints-384532015-05-15T01:28:21Z http://psasir.upm.edu.my/id/eprint/38453/ The effect of slope steepness on soil erosion Ali, Mohd Fozi Said, Salim The degree and length of the slope are two essential features of topography in relation to runoff and soil erosion. Dunne (1977) observed that topographic steepness is a significant factor effecting sediment yields. Soil losses can be expected to increase with slope length and steepness as a result of respective increases in volume and velocities of surface runoff. Steep slopes are often susceptible to landslides even under forest conditions and such slope become more susceptible to erosion once disturbed. The observations of this study will be made using the Soil Erosin Gauge (Baharuddin, 1995) on three categories of slopes; gentle, moderate, and steep slopes. Previous studies had concluded that the relation between slope steepness and soil loss was curvilinear. Investigation by Zingg (1940) showed that the relationship between steepness of slope and soil erosion could be represented by the power equation y = axb where b is 1.49, a is 0.065, x is the percent of slope steepness and y is the coded weight of soil loss. The USLE slope steepness factor was developed (Wischmeier and Smith, 1978) by the equation S = 65.41sin20 + 4.56sin0 + 0.065 where 0 is the angle of slope steepness in degrees. The percent slope factor is also known to interest with management practices such as contouring and terracing. 1999 Conference or Workshop Item PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/38453/1/38453.pdf Ali, Mohd Fozi and Said, Salim (1999) The effect of slope steepness on soil erosion. In: NationalConference on Engineering Smart Farming for the Next Millenium, 14-16 Mac 1999, UPM, Serdang, Selangor. . (Unpublished)
spellingShingle Ali, Mohd Fozi
Said, Salim
The effect of slope steepness on soil erosion
title The effect of slope steepness on soil erosion
title_full The effect of slope steepness on soil erosion
title_fullStr The effect of slope steepness on soil erosion
title_full_unstemmed The effect of slope steepness on soil erosion
title_short The effect of slope steepness on soil erosion
title_sort effect of slope steepness on soil erosion
url http://psasir.upm.edu.my/id/eprint/38453/1/38453.pdf
work_keys_str_mv AT alimohdfozi theeffectofslopesteepnessonsoilerosion
AT saidsalim theeffectofslopesteepnessonsoilerosion
AT alimohdfozi effectofslopesteepnessonsoilerosion
AT saidsalim effectofslopesteepnessonsoilerosion