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Title: Rain microstructure and erosivity relationships under pressurized rainfall simulator
Authors: Abd Elbasit M.A.M.
Ojha, C. S. P.
Ahmed Z.
Yasuda H.
Salmi A.
Ahmed F.
Published in: Journal of Hydrologic Engineering
Abstract: Rain simulators have been used extensively in order to assess the interaction between rainfall and land surface. The main objective of a rain simulator is to produce rain with characteristics similar to natural rainfall at a certain geographical location. This paper investigates the microstructural characteristics of rainfall generated by a pressurized simulation system and their impact on rainfall erosivity in comparison with natural rainfall for different environments. The simulated raindrop characteristics have been measured using two piezoelectric transducers to investigate the rainfall kinetic energy and drop size distribution. The pressurized simulation system was able to generate rain with different intensities and the relationship between the pressure and rainfall intensity was statistically significant. On the other hand, the time-based rainfall kinetic energy was increasing linearly with rainfall intensity. The pressurized rain simulator showed low volume-based kinetic energy (KE<inf>c</inf>) and the trend was different from that observed under natural rainfall. The average percentage of small raindrops (<2 mm) was more than 98%, and the average median drop size was 1.4 mm. © 2015 American Society of Civil Engineers.
Citation: Journal of Hydrologic Engineering(2015), 20(6): -
Issue Date: 2015
Publisher: American Society of Civil Engineers (ASCE)
Keywords: Drop size distribution
Piezoelectric transducer
Rainfall energy
Soil erosion
ISSN: 10840699
Author Scopus IDs: 26533726700
Author Affiliations: Abd Elbasit, M.A.M., Dept. of Geography, Environmental Management and Energy Studies, Univ. of Johannesburg, Johannesburg, 2006, South Africa
Ojha, C.S.P., Civil Engineering Dept., Indian Institute of Technology, Roorkee, 247667, India
Ahmed, Z., Dept. of Agriculture, Soil and Environmental Science Section, Univ. of Haripur, Haripur, 22620, Pakistan
Yasuda, H., Arid Land Research Center, Tottori Univ., Tottori, 1390, Japan
Salmi, A., Gradient Lab. Ltd., Kisällinete 8, Porvoo, FI-06150, Finland
Ahmed, F., School of Geography, Archaeology and Environmental Studies, Univ. of Witwatersrand, Johannesburg, 2050, South Africa
Corresponding Author: Abd Elbasit, M.A.M.; Dept. of Geography, Environmental Management and Energy Studies, Univ. of JohannesburgSouth Africa
Appears in Collections:Journal Publications [CE]

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