Volume 19, Issue 71 (spring 2015)                   JWSS 2015, 19(71): 59-68 | Back to browse issues page

XML Persian Abstract Print

Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Vaezi A R, Vatani A. Determining Rill Erodibility in Some Soils in Zanjan Province Under Simulated Rainfall . JWSS. 2015; 19 (71) :59-68
URL: http://jstnar.iut.ac.ir/article-1-2997-en.html
Dept. of Soil Sci., College of Agric, Univ. of Zanjan, Zanjan, Iran. , vaezi.alireza@gmail.com
Abstract:   (7245 Views)

Rill erosion is the detachment and transport of soil particles by concentrated flow of runoff. It is the most common form of water erosion in the hill slopes. Rill erodibility is the rate at which soil particle is detached and transported by shear force of the concentrated flow. The study was conducted to determine the rill erodibility in different soil textures in Zanjan province using a rainfall simulator. To this end, samples of eight soil textures consisting of clay, clay loam, silty loam, sandy clay loam, sandy loam, loamy sand, and sandy were collected from land surface and transported to small plots (120 cm  100 cm) on a sloped uniform land (10%). The plots were exposed to five simulated rainfalls with a constant intensity of 60 mm h-1 for one hour. Based on the results, there was a significant difference among the soil textures in the rill erodibility (p< 0.01). Rill erodibility of the soils significantly correlated with mineral fraction (sand, clay, gravel) and exchangeable sodium percentage (ESP). With an increase in sand and gravel percentage, soil infiltration rate strongly increased and consequently production of the concentrated flow steadily decreased. Multiple regression analysis indicated that the rill erodibility in the soils was remarkably related to ESP (R2= 0.85, P< 0.01). Clay soil showed to have the highest rill erodibility among the soil textures due to higher exchangeable sodium percentage (ESP= 13).

Full-Text [PDF 30 kb]   (2433 Downloads)    
Type of Study: Research | Subject: Ggeneral
Received: 2015/06/10 | Accepted: 2015/06/10 | Published: 2015/06/10

Add your comments about this article : Your username or Email:

Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

© 2021 CC BY-NC 4.0 | JWSS - Isfahan University of Technology

Designed & Developed by : Yektaweb