Comparative analysis of rainfall measurement ability of multi-type rain gauges

In order to measure the rainfall measurement performance of different types of rainfall observation instruments, five different rain gauges (weighing rain gauge OTT Pluvio2 and LTPG1500, tipping bucket rain gauge SL3-1 and JDZ05, piezoelectric rain gauge RT) were compared. The results show that the rainfall measured by the weighing rain gauge OTT Pluvio2 and LTPG1500 basically fluctuates within the range of ± 4% error control line under all rainfall intensities (10～260 mm/h) set in the experiment. The rainfall measured by the tipping bucket rain gauge SL3-1 is generally lower than the error control line of 4%. When the rainfall intensity is large, most of the tipping bucket rain gauge JDZ05 can meet the requirements of the relevant specifications; although the piezoelectric rain gauge can qualitatively analyze the rainfall intensity, it has a significant deviation in the quantitative measurement accuracy. The comparison results can provide a scientific basis for researchers to reasonably select rainfall observation instruments.