נגישות
menu      
Advanced Search
Syntax
Search...
Volcani treasures
About
Terms of use
Manage
Community:
אסיף מאגר המחקר החקלאי
Powered by ClearMash Solutions Ltd -
Effects of rainfall intensity and slope gradient on the dynamics of interrill erosion during soil surface sealing
Year:
2006
Source of publication :
Catena
Authors :
Assouline, Shmuel
;
.
Ben-Hur, Meni
;
.
Volume :
66
Co-Authors:
Assouline, S., Institute of Soil, Water and Environmental Sciences, A.R.O., T he Volcani Center, P.O.B. 6, Bet Dagan 50-250, Israel
Ben-Hur, M., Institute of Soil, Water and Environmental Sciences, A.R.O., T he Volcani Center, P.O.B. 6, Bet Dagan 50-250, Israel
Facilitators :
From page:
211
To page:
220
(
Total pages:
10
)
Abstract:
Soil erosion during rainfall is strongly affected by runoff and slope steepness. Runoff production is drastically increased when a seal is formed at the soil surface during rainfall. Therefore, a complex interaction exists between soil erosion and surface sealing. In this study, the dynamics of interrill erosion during seal formation is studied under different simulated rainfall and slope conditions. A sandy soil was exposed to 70 mm of rainfall at two intensities, 24 mm h- 1 and 60 mm h- 1, and five slope gradients, from 5% to 25%. Infiltration, runoff and soil loss rates were monitored during rainfall. Final infiltration rates increased with slope gradient at both rainfall intensities, this effect being stronger for the higher intensity. Cumulative runoff at the end of the rainfall event was lower as slopes were steeper, while an opposite trend was obtained for soil loss. For the 5% and the 9% slopes, the sediment concentration in runoff reached quickly a stable value during the whole rainfall event, while it reached a peak value before declining for the higher slopes. The peak value and its timing were rainfall intensity dependent. Soil erodibility during seal formation was evaluated using two empirical multiplication-of-factors type models. It seems that slope and rainfall erosivity are accounted for only partly in these models. For mild slope gradients below 9%, the value of Ki estimated by means of the two expressions becomes practically constant shortly after runoff apparition. Consequently, the estimates resulting from this type of expressions remain valuable from the practical point of view. © 2006 Elsevier B.V. All rights reserved.
Note:
Related Files :
erodibility
Erosion
Infiltration
Interrill erosion
precipitation intensity
runoff
sealing
slope dynamics
soil erosion
Soil sealing
Show More
Related Content
More details
DOI :
10.1016/j.catena.2006.02.005
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
31141
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 01:00
Scientific Publication
Effects of rainfall intensity and slope gradient on the dynamics of interrill erosion during soil surface sealing
66
Assouline, S., Institute of Soil, Water and Environmental Sciences, A.R.O., T he Volcani Center, P.O.B. 6, Bet Dagan 50-250, Israel
Ben-Hur, M., Institute of Soil, Water and Environmental Sciences, A.R.O., T he Volcani Center, P.O.B. 6, Bet Dagan 50-250, Israel
Effects of rainfall intensity and slope gradient on the dynamics of interrill erosion during soil surface sealing
Soil erosion during rainfall is strongly affected by runoff and slope steepness. Runoff production is drastically increased when a seal is formed at the soil surface during rainfall. Therefore, a complex interaction exists between soil erosion and surface sealing. In this study, the dynamics of interrill erosion during seal formation is studied under different simulated rainfall and slope conditions. A sandy soil was exposed to 70 mm of rainfall at two intensities, 24 mm h- 1 and 60 mm h- 1, and five slope gradients, from 5% to 25%. Infiltration, runoff and soil loss rates were monitored during rainfall. Final infiltration rates increased with slope gradient at both rainfall intensities, this effect being stronger for the higher intensity. Cumulative runoff at the end of the rainfall event was lower as slopes were steeper, while an opposite trend was obtained for soil loss. For the 5% and the 9% slopes, the sediment concentration in runoff reached quickly a stable value during the whole rainfall event, while it reached a peak value before declining for the higher slopes. The peak value and its timing were rainfall intensity dependent. Soil erodibility during seal formation was evaluated using two empirical multiplication-of-factors type models. It seems that slope and rainfall erosivity are accounted for only partly in these models. For mild slope gradients below 9%, the value of Ki estimated by means of the two expressions becomes practically constant shortly after runoff apparition. Consequently, the estimates resulting from this type of expressions remain valuable from the practical point of view. © 2006 Elsevier B.V. All rights reserved.
Scientific Publication
You may also be interested in