Developing Rainfall Erosivity Index Based on Field Soil Loss Measurements at the Small Plots in a Semi-Arid Region

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VAEZI A.R.; ROSTAMI Y.

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Paper Information

Journal: IRANIAN JOURNAL OF WATERSHED MANAGEMENT SCIENCE AND ENGINEERING Year:2017 | Volume:10 | Issue:35 Page(s): 9-14

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Title

Developing Rainfall Erosivity Index Based on Field Soil Loss Measurements at the Small Plots in a Semi-Arid Region

Author(s)

VAEZI A.R. | ROSTAMI Y. | Issue Writer Certificate

Keywords

EI7.5Q1

Rainfall erosivityQ2

Rainfall intensityQ1

Rainfall durationQ1

Abstract

Rainfall erosivity is defined as the power of raindrops to erosion, which can be expected to change in correspondence to changes in rain characteristics, particularly intensity and duration. This study was conducted to assess the effects of intensity and duration on Rainfall erosivity in a semi-arid region in North West of Zanjan, Iran. Soil loss was measured at forty eight plots (60 cm Í 80 cm) under the simulated rainfalls with eight rainfall intensities and six durations at five replications in a sloped land (8%). Based on the results, out of 240 rainfall events, only 180 events caused soil loss at the plots. Rainfall intensity of 15 mm h-1 was threshold intensity of the rainfalls from view point of soil erosion at the plots. Total rainfall energy of rainfall (E) obtained based on the sum of energies of all raindrops had a better correlation with the amount of soil loss at the plots (r= 0. 92). Soil loss strongly correlated with an index obtained from the multiplication of maximum 7. 5 minute intensity (I7. 5) and rainfall energy (E), EI7. 5. About 96 percentage of soil loss at the plots could be explained by EI7. 5. The results indicated that, EI7. 5 as compared to the EI30 can properly predict soil loss at the small plots similar to what usually happens in the surface erosion.

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APA: Copy

VAEZI, A.R., & ROSTAMI, Y.. (2017). Developing Rainfall Erosivity Index Based on Field Soil Loss Measurements at the Small Plots in a Semi-Arid Region. IRANIAN JOURNAL OF WATERSHED MANAGEMENT SCIENCE AND ENGINEERING, 10(35 ), 9-14. SID. https://sid.ir/paper/134793/en

Vancouver: Copy

VAEZI A.R., ROSTAMI Y.. Developing Rainfall Erosivity Index Based on Field Soil Loss Measurements at the Small Plots in a Semi-Arid Region. IRANIAN JOURNAL OF WATERSHED MANAGEMENT SCIENCE AND ENGINEERING[Internet]. 2017;10(35 ):9-14. Available from: https://sid.ir/paper/134793/en

IEEE: Copy

A.R. VAEZI, and Y. ROSTAMI, “Developing Rainfall Erosivity Index Based on Field Soil Loss Measurements at the Small Plots in a Semi-Arid Region,” IRANIAN JOURNAL OF WATERSHED MANAGEMENT SCIENCE AND ENGINEERING, vol. 10, no. 35 , pp. 9–14, 2017, [Online]. Available: https://sid.ir/paper/134793/en

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