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Oscillating Rainfall Simulator Using Veejet Nozzle: Set-up and Calibration for Soil Erosion and Failure Studies

  • Journal of the Association of Korean Geographers
  • Abbr : JAKG
  • 2016, 5(2), pp.133-142
  • Publisher : Association of Korean Geographers
  • Research Area : Social Science > Geography

Jin Kwan Kim 1 김민석 2 Han Min 3 YANG Dong Yoon 4

1전남대학교
2충남대학교 국제수자원연구소
3서울대학교
4한국지질자원연구원

Candidate

ABSTRACT

To perform appropriately indoor or field experiment for soil erosion and failure studies, the understanding characteristics of raindrops from a rainfall simulator is much important. The set-up and characterization of the portable oscillating rainfall simulator using Veejet nozzle 80150 are presented. The proper input current is suggested via the analysis of spatial rainfall intensity changes from input current changes. Size distributions and velocities of raindrops from the rainfall simulator within proper input current were measured by an optical laser disdrometer and compared with those of the natural rainfall from previous studies. Size distributions and velocities of raindrops from the rainfall simulator are similar to those of the natural heavy rain storm but rainfall intensities from the rainfall simulator exceed much those of the natural heavy rain storm. These differences in rainfall's physical characteristics between artificial and natural rainfall has to be considered when this rainfall simulator is applied to the experiment of soil erosion and soil failure. This study will contribute to the development of an erosion and failure experiment.

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