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Measuring and calibrating of rainfall characteristics in tow nozzles rainfall simulator

    Authors

    • Ataolah Kavian
    • 1 1
    • 1 1
    • 1 1
    • 1 1
    • 1 1
    • 1 1

    1

,

Document Type : Research Paper

10.22059/jrwm.2018.135470.929
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Abstract

Small and portable rainfall simulators are essential tools in study of soil erosion and surface hydrology and it provide to repeat natural rainfall characteristics. In addition to the introduction of this device, calibration tests were performed including nozzles discharge evaluation, uniformity test over the plots and raindrop size distribution. The results of nozzles discharge calibration showed that two nozzles discharge at 20, 40, 60 and 80 KPa pressure are similar and there isn't any significant difference between them. To achieve the optimum uniformity of simulated rainfall over the plot uniformity test was performed with changing nozzle distance (50, 60 and 70 cm) and oscillation of nozzles (30, 45 and 60 degrees) at constant operational pressure of 60 KPa. The results showed that the uniformity coefficient at 2m2 plot obtained from 57% to 61% and rainfall intensity changes from 48 to 101 mm/hr. The results of high velocity photography revealed median diameter of raindrop as 2.4 to 2.6 mm.

Keywords

  • Rainfall simulator
  • calibration
  • Photography
  • rainfall uniformity
  • raindrop size
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Journal of Range and Watershed Managment
Volume 71, Issue 1
June 2018
Pages 253-267
Files
  • XML
  • PDF 1.51 M
History
  • Receive Date: 02 November 2015
  • Revise Date: 27 May 2018
  • Accept Date: 19 May 2018
  • First Publish Date: 22 May 2018
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How to cite
  • RIS
  • EndNote
  • Mendeley
  • BibTeX
  • APA
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Statistics
  • Article View: 217
  • PDF Download: 217

APA

Kavian, A., 1, 1., 1, 1., 1, 1., 1, 1., 1, 1., & 1, 1. (2018). Measuring and calibrating of rainfall characteristics in tow nozzles rainfall simulator. Journal of Range and Watershed Managment, 71(1), 253-267. doi: 10.22059/jrwm.2018.135470.929

MLA

Ataolah Kavian; 1 1; 1 1; 1 1; 1 1; 1 1; 1 1. "Measuring and calibrating of rainfall characteristics in tow nozzles rainfall simulator". Journal of Range and Watershed Managment, 71, 1, 2018, 253-267. doi: 10.22059/jrwm.2018.135470.929

HARVARD

Kavian, A., 1, 1., 1, 1., 1, 1., 1, 1., 1, 1., 1, 1. (2018). 'Measuring and calibrating of rainfall characteristics in tow nozzles rainfall simulator', Journal of Range and Watershed Managment, 71(1), pp. 253-267. doi: 10.22059/jrwm.2018.135470.929

VANCOUVER

Kavian, A., 1, 1., 1, 1., 1, 1., 1, 1., 1, 1., 1, 1. Measuring and calibrating of rainfall characteristics in tow nozzles rainfall simulator. Journal of Range and Watershed Managment, 2018; 71(1): 253-267. doi: 10.22059/jrwm.2018.135470.929

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