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http://dx.doi.org/10.5762/KAIS.2019.20.12.828

Rainfall Distribution Characteristics of Artificial Rainfall System for Steep-Slope Collapse Model Experiment  

Jeong, Hyang-Seon (Disaster Prevention Research Division, National Disaster Management Research Institute)
Kang, Hyo-Sub (Disaster Prevention Research Division, National Disaster Management Research Institute)
Suk, Jae-Wook (Disaster Prevention Research Division, National Disaster Management Research Institute)
Kim, Ho-Jong (Disaster Prevention Research Division, National Disaster Management Research Institute)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.20, no.12, 2019 , pp. 828-835 More about this Journal
Abstract
An artificial rainfall system is used widely as a research tool for generating model experiment data. Artificial rainfall devices have been used in many studies, but studies of the rainfall distribution are not considered as important issues. To simulate various rainfall characteristics, it should be possible to simulate from low to high intensity, and the homogeneity of the rainfall distribution should be ensured. In this study, the maximum rainfall intensity was set to 130mm/hr and controlled by 10mm/hr. In addition, the aim was to secure a uniform coefficient value of 80% or more. To this end, rainfall tests were performed according to the nozzle type, diameter, position, and pump pressure. The rainfall test showed that the circular nozzle was suitable, and the nozzle size was 1.9mm and 1.4mm. The optimal pump pressure was found to be 3~6kg/㎠. The rainfall intensity tended to increase linearly with increasing pump pressure. Based on the rainfall test results, a rainfall control manual was produced with variables, such as pump pressure, nozzle type, and number of nozzles. As a result of rainfall verification, rainfall intensity showed a 3.1% error with a uniformity coefficient of 86%.
Keywords
Artificial Rainfall; Intensity; Uniformity Coefficient; Nozzle; Steep-Slope Collapse Model Experiment;
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Times Cited By KSCI : 3  (Citation Analysis)
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