The Uniformity Tests of A Rainfall Generator

Abstract

Abstract. A practical rainfall generator for meteorological metrology research has been designed. The rainfall generator is adopted to produce a rainfall environment for rainfall instruments test and calibration. The uniformity of the rainfall generator is tested with rainfall collectors and the Christiansen coefficient of Uniformity (CUC) ranged from 80.57% to 87.32%. The results obtained by the rainfall generator indicate that the middle part of the whole test plot is consistent and raingauges can be planted in the four quarters of the compass so as to carry out rainfall intensity test.

Research on the Fine-Scale Spatial Uniformity of Natural Rainfall and Rainfall from a Rainfall Simulator with a Rotary Platform (RSRP)

“…A pressure gauge located between the pressure regulator and nozzle was used to monitor pressure during tests. Pressure values were within ±1 kPa of the nominal pressure rating [9]. The rotary platform consists of a rotary worktable, slip ring, support, and four wire-connection boxes.…”

“…Furthermore, it was quite difficult to ensure that the velocity of the artificial raindrops was consistent with that of natural raindrops. In order to solve these problems, Liu et al [9] designed a nozzle-type RS prototype, and evaluated it with the Christiansen Uniformity Coefficient (CU), whose values ranged from 80.12-87.32%.…”

Development of a large-scale rainfall simulator for urban hydrology research

“…Rainfall simulators are indispensable research tools for visualization and analysis of the rainfall-runoff dynamics and associated processes. Rainfall simulation is a technique widely used in soil science (KATUWAL et al, 2013), agronomy (MARDAMOOTOO et al, 2015), hydrology (SILVEIRA et al, 2016), and in other fields such as meteorological metrology (LIU et al, 2015) and building science (BLOCKEN;CARMELIET, 2004). Advantages of rainfall simulation are thoroughly described in the literature.…”