The Effects of Antecedent Rainfall on Splash Erosion in a Marl Soil under Rainfall Simulator

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Vaezi Ali Reza; Karimi Shokouh; FOROUMADI MAJID

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Journal: APPLIED SOIL RESEARCH Year:2019 | Volume:7 | Issue:1 Page(s): 83-94

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Title

The Effects of Antecedent Rainfall on Splash Erosion in a Marl Soil under Rainfall Simulator

Author(s)

Vaezi Ali Reza | Karimi Shokouh | FOROUMADI MAJID | Issue Writer Certificate

Keywords

Aggregate breakdownQ1

Particles splashQ1

Rainfall durationQ2

Soil water contentQ1

Abstract

Splash erosion is one of the most important kinds of water erosion. Splash of soil particles may affected by some factors especially antecedent rainfall event. Up to now, there isn’ t any study on the effects of antecedent rainfall on splash erosion in the next rainfall. This study was conducted to investigate the effect of antecedent rainfall on the Particles splash in a marl soil. Toward this, aggregates with a diameter of 6-8mm were taken from a marl soils under fallow condition in 2016. Aggregates were packed in 24 boxes with 30cm× 40cm dimensions and 30cm depth to investigate effect of eight Rainfall durations levels at three replications. Simulated rainfall was applied to soil samples with eight durations (0, 7, 14, 21, 28, 35, 42 and 49 min). Aggregate breakdown and Soil water content were determined in the soil samples after one day. After one day, soil boxes were placed under the same rainfall with a constant intensity of 40 mm h-1 for 15 min. Based on results, duration of antecedent rainfall significantly affected the Aggregate breakdown and increased the Soil water content. The longest Rainfall duration (49 min) appeared the highest Aggregate breakdown (21. 72%) as well as soil moisture content (29. 08%). The amount of splash erosion in the next rain event was significantly influenced by the changes in two soil variables, i. e. Aggregate breakdown (P <0. 05) and Soil water content (P <0. 01), implied by the antecedent rainfall. Multiple linear regression analysis showed that among the two soil variables, antecedent Soil water content is the most important factor determining the splash erosion variation in the next rain event (R2 = 0. 83, P<0. 01). The splash erosion in each rain event could be reliably estimated by determining the antecedent Soil water content.

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APA: Copy

Vaezi, Ali Reza, Karimi, Shokouh, & FOROUMADI, MAJID. (2019). The Effects of Antecedent Rainfall on Splash Erosion in a Marl Soil under Rainfall Simulator. APPLIED SOIL RESEARCH, 7(1 ), 83-94. SID. https://sid.ir/paper/261911/en

Vancouver: Copy

Vaezi Ali Reza, Karimi Shokouh, FOROUMADI MAJID. The Effects of Antecedent Rainfall on Splash Erosion in a Marl Soil under Rainfall Simulator. APPLIED SOIL RESEARCH[Internet]. 2019;7(1 ):83-94. Available from: https://sid.ir/paper/261911/en

IEEE: Copy

Ali Reza Vaezi, Shokouh Karimi, and MAJID FOROUMADI, “The Effects of Antecedent Rainfall on Splash Erosion in a Marl Soil under Rainfall Simulator,” APPLIED SOIL RESEARCH, vol. 7, no. 1 , pp. 83–94, 2019, [Online]. Available: https://sid.ir/paper/261911/en

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