The Effect of Slope Steepness and Antecedent Moisture Content on Interrill Erosion, Runoff and Sediment Size Distribution in the Highlands of Ethiopia : Volume 15, Issue 7 (22/07/2011)

By Defersha, M. B.

Book Id: WPLBN0003988159
Format Type: PDF Article :
File Size: Pages 9
Reproduction Date: 2015

Title:	The Effect of Slope Steepness and Antecedent Moisture Content on Interrill Erosion, Runoff and Sediment Size Distribution in the Highlands of Ethiopia : Volume 15, Issue 7 (22/07/2011)
Author:	Defersha, M. B.
Volume:	Vol. 15, Issue 7
Language:	English
Subject:	Science, Hydrology, Earth
Collections:	Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic Publication Date:	2011
Publisher:	Copernicus Gmbh, Göttingen, Germany

Member Page:	Copernicus Publications
Citation APA MLA Chicago Melesse, A., Quraishi, S., & Defersha, M. B. (2011). The Effect of Slope Steepness and Antecedent Moisture Content on Interrill Erosion, Runoff and Sediment Size Distribution in the Highlands of Ethiopia : Volume 15, Issue 7 (22/07/2011). Retrieved from http://gutenberg.cc/

Description
Description: Department of Earth and Environment, Florida International University, Miami, USA. Soil erosion is a two-phase process consisting of the detachment of individual particles and their transport by the flowing water. This study discusses the results of laboratory experiments in which for three soils, the runoff depth, sediment yield, splash erosion and sediment size were measured. Rainfall intensity, slope and antecedent moisture contents were varied in the experiment. The soil types ranged from clay to sandy clay loam (Alemaya Black soil, Regosols and Cambisols). Rainfall was applied for six sequential 15-min periods with rainfall intensities varying between 55 and 120 mm h⁻¹. The three slopes tested were 9, 25, and 45 %. Results show that as slope increased from 9 to 25 %, splash erosion and sediment yield increased. An increase in slope from 25 to 45 % generally decreases in splash erosion. Sediment yield for one soil increased and one soil decreased with slope and for the third soil the trend was different between the two initial moisture contents. Sediment yield was correlated (r = 0.66) with runoff amounts but not with splash erosion. Interrill erosion models that were based on the flowing water and rainfall intensity fitted the data better than when based on rainfall intensity solely. Models that assume a positive linear relationship between erosion and slope may overestimate sediment yield.

Summary
The effect of slope steepness and antecedent moisture content on interrill erosion, runoff and sediment size distribution in the highlands of Ethiopia

Excerpt
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