Flow Characteristics and Rill Erodibility in Relation to the Rainfall Intensity in a Marl Soil

Q: How can I download an article?

To download an article from SID, first log in to the site, search for the article title, and click on the 'Download Article' option.

Q: How can I download an ISI article?

To download an ISI article on SID, enter the keyword or article title in the search bar, view the relevant results, click on the desired article, and select the 'Download Article' option.

Q: How can I access the SID database?

To access the SID database, visit SID.ir, create an account, and log in to access scientific resources.

Q: Is downloading articles from SID free?

Some articles on SID are available for free, while others require payment. Details are specified on the article's page.

FOROUMADI M.; VAEZI A.R.

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Journal Paper

Paper Information

Journal: IRANIAN JOURNAL OF WATERSHED MANAGEMENT SCIENCE AND ENGINEERING Year:2018 | Volume:12 | Issue:40 Page(s): 11-22

Download Full-Text

Persian Verion

View:

813

Download:

Cites:

Information Journal Paper

Title

Flow Characteristics and Rill Erodibility in Relation to the Rainfall Intensity in a Marl Soil

Author(s)

FOROUMADI M. | VAEZI A.R. | Issue Writer Certificate

Keywords

Concentrated flowQ1

Flow velocityQ2

Rainfall intensity thresholdQ1

Rill erosionQ1

Abstract

Rill erosion which occurs as a result of runoff concentration on a hillslope is one of the major soil erosion types in arid and semi-arid regions, especially where plant cover is poor. For this reason, understanding the factors affecting them is a high priority. Rill erodibility indicates the ease of soil particles detachment and transport by water shear force in a rill. The study was conducted to investigate the effect of rainfall intensity on the flow characteristics and rill erodibility (Kr) in a marl soil. A laboratory experiment was carried out in ten rainfall intensities from 10 to 100 mm. h-1 at three replications. Soil samples were taken from a semi-arid region in west of Zanjan and placed into a flume with 0. 4 m × 9 m in dimensions. Rill erodibility (Kr) was determined using the WEPP model at three artificial rills. The results showed that flow characteristics (velocity, discharge and shear stress) and rill erodibility were affected significantly by rainfall intensity (P<0. 000). Threshold rainfall intensity was recognized to be 30 mm. h-1 for producing an erosive flow with 2. 37×10-3 N. m-2 in shear stress and 0. 018 kg. N-1s-1 in rill ertodibility (R2=0. 92, P< 0. 01). Rill erodibility increased strongly with increasing rainfall intensity. This result was associated with higher disruption of soil aggregates and higher production of Concentrated flow in the rills. Shear stress and flow concentration contrary to other flow characteristics increased strongly for rainfalls from 30 mm. h-1 to 60 mm. h-1 intensity and then significantly decreased due to larger increase in Flow velocity and greater decrease in flow concentration. Out of the flow characteristics, Flow velocity was the most important factor to explain the variation pattern of rill erodibility under the rainfall intensities, so that there was significant relationship between the two variables (R2=0. 99, P< 0. 001). This study indicated that the rainfall intensity is a major factor controlling the flow characteristics and rill erodibility of furrows in the marl soil.

Cites

No record.

References

No record.

Cite

APA: Copy

FOROUMADI, M., & VAEZI, A.R.. (2018). Flow Characteristics and Rill Erodibility in Relation to the Rainfall Intensity in a Marl Soil. IRANIAN JOURNAL OF WATERSHED MANAGEMENT SCIENCE AND ENGINEERING, 12(40 ), 11-22. SID. https://sid.ir/paper/134774/en

Vancouver: Copy

FOROUMADI M., VAEZI A.R.. Flow Characteristics and Rill Erodibility in Relation to the Rainfall Intensity in a Marl Soil. IRANIAN JOURNAL OF WATERSHED MANAGEMENT SCIENCE AND ENGINEERING[Internet]. 2018;12(40 ):11-22. Available from: https://sid.ir/paper/134774/en

IEEE: Copy

M. FOROUMADI, and A.R. VAEZI, “Flow Characteristics and Rill Erodibility in Relation to the Rainfall Intensity in a Marl Soil,” IRANIAN JOURNAL OF WATERSHED MANAGEMENT SCIENCE AND ENGINEERING, vol. 12, no. 40 , pp. 11–22, 2018, [Online]. Available: https://sid.ir/paper/134774/en

Related Journal Papers