Preprints
https://doi.org/10.5194/hess-2021-502
https://doi.org/10.5194/hess-2021-502

  18 Nov 2021

18 Nov 2021

Review status: this preprint is currently under review for the journal HESS.

Innovatory rainfall simulator design – A concept of moving storm automation

Ravi Kumar Meena1, Sumit Sen1, Aliva Nanda1, Bhargabnanda Dass1, and Anurag Mishra2 Ravi Kumar Meena et al.
  • 1Department of Hydrology, Indian Institute of Technology, Roorkee, Uttarakhand- 247667, India
  • 2DSI, LLC, Washington, USA

Abstract. We developed an advanced design programmable rainfall simulator (RS) to simulate a moving storm rainfall condition. The RS consists of an automated nozzle control system coupled with a pressure regulator mechanism for an operating range of 50 kPa to 180 kPa at a drop height of 2000 mm above the soil flume surface. Additionally, a programmable mobile application was developed to regulate all RS valves. Near natural rainfall conditions were simulated at varying spatial and temporal resolutions in a controlled environment. A soil flume of 2500 mm × 1400 mm × 500 mm was fabricated to conduct different hydrological experiments. The flume was designed to record overland, subsurface, and base flows simultaneously. This study focused on a detailed analysis of moving storms and their impact on hydrograph characteristics. Experimental results showed a considerable difference in terms of time to peak (tp), peak discharge (Qp), and hydrograph recession for two different storm movement directions (upstream and downstream). Two multiple regression models indicate a statistically significant relationship between the dependent variable (tp or Qp) and the independent variables (i.e. storm movement direction, storm velocity, and bed slope gradient) at a 5 % level of significance. Further, the impact of these moving storm phenomena reduces with the increase in the storm movement velocity.

Ravi Kumar Meena et al.

Status: open (until 13 Jan 2022)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse

Ravi Kumar Meena et al.

Ravi Kumar Meena et al.

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Short summary
We developed a mobile operated programmable rainfall simulator (RS) to simulate the near natural moving storm rainfall condition and to study its impact on runoff, soil erosion and nutrient transport. The designed RS can be used for variable velocity and slope conditions along with the three different soil type at a time. Moreover, the soil flume of the RS is associated with the surface, subsurface and base flow components.