浅析辽中县降水量与干旱指数的关系

Study on the relation between the precipitation and drought index in Liaozhong

辽中县多年平均降水量在621.2mm,属于辽宁中部半干旱地区,降水量年内分配极不均匀,春播期降水量偏少,极易发生春旱。干旱指数是反映流域或区域的湿润与干旱分布规律和程度的一个指标。本文采用降水和干旱指数的关系分析了旱情与降水量年内分配密切关系。

Liaozhong county belongs to the semi-arid region in Liaoning,its average annual precipitation is621.2mm,but the distribution of precipitation is extremely uneven,and spring drought frequently happens in spring snowing season.The drought index is an index that reflects the law and level of humidity and drought in certain basin or region.The paper analyzes the relation between the drought frequency and the precipitation distribution annually according to the relation between the precipitation and drought index.