Abstract：In order to meet the real-time integration of hydrological data, speed up the construction of hydrological monitoring automation, and accurately understand the rationality of the observation of rainfall results by automated rain gauges,this paper takes the rainfall data of Beijing as the research object, and selects the rainfall data of 26 stations from 2016 to 2018. From the four aspects of annual precipitation, precipitation days, daily precipitation, and typical precipitation, the observed rainfall of the weighing rain gauge and the siphon rain gauge are compared. The results show that the two observation sequences have good correlation and consistency. Remove the shortage of weighing rain gauge caused by poor communication, the correlation coefficient of the two is 0.94, the mean absolute error and the root mean square error are -0.15 and 2.35 respectively, in line with the "precipitation observation specification" (SL 21-2015), therefore the weighing rain gauge can better replace the siphon rain gauge, indicating that the automatic rain gauge monitoring has certain reliability.
2020, Vol. 30 
