桂林干旱风险评估及人工增雨抗旱研究

利用灾害风险评估方法,对桂林干旱的致灾因子和承灾体脆弱性进行分析,对干旱灾害风险进行综合评估。评估结果是桂林东南为全市干旱高风险区，西北为干旱低风险区。根据干旱发生情况及风险评估结论，对人工增雨作业方式进行研究。由于不同季节降水云系的云体负温区的高度和厚度差异，作业方式可分为夏秋季节和冬春季节两种，总的目标是要将AgI成冰核播撒到云体内的负温区，才能达到对云体催化，增加地面降水的目的。

Study on Drought Risk Assessment and Artificial Precipitation for Drought Relief in Guilin

Using the method of disaster risk assessment, this paper analyzes the disaster causing factors and hazard bearing body fragility of drought in Guilin and conducts comprehensive evaluations on drought disaster as well. The assessment result is that the southeast of Guilin is the high risk area of drought while the northwest is the low risk area. According to the drought risk assessment conclusions, the study on artificial precipitation is made. Due to the difference of altitude and thickness of minus temperature zone of precipitation clouds in difference seasons, the pattern of artificial precipitation operation may be divided into two, one for summer and autumn and the other for winter and spring. The general goal is to sow AgI Ice nucleus into the minus temperature area of rainfall clouds, catalyze the cloud and increase the surface precipitation.