2020
DOI: 10.25156/ptj.v10n1y2020.pp12-17
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Simulation of Rainfall Intensity and Slope Gradient to Determination the Soil Runoff Coefficient at Microplot Scale

Abstract: Simulating rainfall is one of the valuable methods of measuring hydrological data and soil erosion processes. Rapid evaluation, high repeatability, and low cost are the reasons of using rain simulators. In this study, a rain simulator was constructed in dimensions of 3.0 × 3.0 × 3.0 m and it was protected on three sides by a plastic cover. An inclined table was used to create slopping surfaces of 5, 10, and 15%. Microplots were used in the dimensions of 0.2 × 0.4 × 1.0 m to collect and measure direct runoff in… Show more

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Cited by 2 publications
(6 citation statements)
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“…This agrees with the results from large runoff plots under natural rainfall ( Lázaro et al, 2021 ) and probably occurs because porosity ( Miralles-Mellado et al, 2011 ) and surface roughness ( Chamizo et al, 2010 ) also increase along the biocrust succession and both favor infiltration. This opposite result to that of Keya and Karim (2020) shows the great difference of simulating on undisturbed soil samples.…”
Section: Discussioncontrasting
confidence: 59%
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“…This agrees with the results from large runoff plots under natural rainfall ( Lázaro et al, 2021 ) and probably occurs because porosity ( Miralles-Mellado et al, 2011 ) and surface roughness ( Chamizo et al, 2010 ) also increase along the biocrust succession and both favor infiltration. This opposite result to that of Keya and Karim (2020) shows the great difference of simulating on undisturbed soil samples.…”
Section: Discussioncontrasting
confidence: 59%
“…According to Keya and Karim (2020) , RC increases with the clay content in laboratory simulations with disturbed soil samples. However, here, RC decreased along the crust succession despite the fact that fines tended to increase ( Miralles-Mellado et al, 2011 ).…”
Section: Discussionmentioning
confidence: 95%
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“…A rainfall simulator device was constructed using a 3 × 3 m steel frame with 3 mm thickness, supported by four galvanized iron pipes, each with a diameter of 0.5 in [31]. The simulation system employed four full cone round spray nozzles having an orifice diameter of 4 mm affixed to the central upper section of the frame, positioned at intervals of 0.6 m at a height of 3.0 m. A control valve for water pressure adjustment was also installed in the system.…”
Section: Rainfall Simulator Construction and Calibrationmentioning
confidence: 99%
“…The runoff coefficient calculation was based on the study of Keya and Karim (2020) [31], quoted from the rational method, as shown in Equation (2).…”
Section: Runoff and Sediment Collectionmentioning
confidence: 99%