鄂尔多斯市一次防雹过程物理效果检验

Physical Effect Test of a Hail Control Process in Erdos City

鄂尔多斯市人工防雹作业期主要在每年6—9月,主要作业区域在鄂尔多斯市北部沿黄河一带和南部乌审旗。对防雹作业效果一直难以有效客观评判。本文采用物理效果检验法对2016年7月3日乌审旗防雹作业过程进行效果检验。选取雷达回波参数中的回波强度、回波顶高、强回波高度、垂直累计液态含水量和强回波面积5个雷达回波参数,对比作业前、后雷达回波参数的变化,结合防雹作业点的用弹量和作业时机综合分析防雹作业效果。结果表明,作业后的雷达回波强度下降了8%,强回波高度下降了22%,垂直累计液态水含量下降了35%,有效抑制了冰雹云的发展。但之后的2次作业用弹量偏少,效果不明显,冰雹云有所增强。

The artificial hailstorm prevention in Ordos City mainly takes place from June to September every year,the main operating areas is along the Yellow River and the Uxin Qi in the south of Erdos City.So it is difficult to evaluate the hail prevention effect effectively and objectively.In this paper,the physical effect analysis method was used to analyze the hail prevention effect on July 3,2016.Selected 5 radar parameters including echo intensity,echo peak height,strong echo height,liquid moisture content and strong echo area,by comparing the changes of radar echo parameters before,during and after the operation,the hail prevention effect was analyzed by combining the bomb quantity at the operation point.The results showed that the radar echo intensity decreased by 8%,the height of strong echo decreased by 22%,and the vertical accumulative liquid water content decreased by 35%Which could effectively inhibite the development of hail cloud.But less amount of ammunition was used in the following two operations,the effect was not obvious,the hailstorm cloud was enhanced.