In order to explore the ability of WRF mode to simulate the rainfall process in the five districts of Zheng-zhou City,a set of WRF simulation parameters was selected which were consistent with most rainfall in five districts of Zhengzhou City.Three microphysical parameter schemes of Thompson,WSM 6 and Lin in WRF mode were used to sim-ulate 9 rainfall events with a duration of 1 h and 3-5 years in the recurrence period,respectively.The nine rainfall events with different rainfall duration and recurrence period were simulated under the Thompson scheme.The relative error(RRE),correlation coefficient(CCOR),root mean squared error(RRMSE)and mean error(MME)commonly used in hydro-logical forecasting were used to evaluate the schemes.The results are show that the rainfall simulation under Thompson scheme is better stable than WSM 6 and Lin schemes in terms of total rainfall,process amount and rainfall trend.For the rainfall of different rainfall duration and recurrence periods,the CCOR of the simulation results by Thompson scheme is high,but the RRMSE is slightly larger;The MME is half positive and half negative,and the value is relatively small.The results have certain reference value for the selection of rainfall forecast scheme for Zhengzhou City.
关键词
WRF模式/降雨模拟/微物理参数/郑州市
Key words
WRF mode/rainfall simulation/microphysical parameters/Zhengzhou City
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