Abstract
Rainstorm disaster causes great damage to human lives, environment and economies. Many environmental catastrophes happened every summer in southern China as result of the rainstorm. Therefore, heavy rain prediction remains the main focus of many scholars’ attention. However, the weather forecast is inaccurate and not prompt enough, causing casualties and financial losses. Weather Research Forecast (WRF) is an effective method and is utilized in this study to predict the precipitable water vapor (PWV) in meso-and small-scale in Nanjing. Rain is formed because of the PWV in the atmosphere, and therefore precipitation could be predicted according to the PWV. A method is proposed that the amount of rainstorm precipitation could be predicted based on the PWV, which can be simulated by WRF. The experimental results are consistent with the actual rainstorm situation. It demonstrates that promising measures based on the reliable WRF model could be taken to reduce the impending disasters.
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