两种干旱指标在乌海地区干旱分析中的应用比较研究

APPLICATION,COMPARISON AND RESEARCH OF TWO KINDS OF GRADE INDICES OF DROUGHT ANALYSIS IN WUHAI AREA

本文对降水量距平百分率、M指数两种干旱指标进行了分析、比较,发现降水量距平百分率是适合乌海地区的干旱指标,并以此为乌海地区的干旱指标,根据乌海实际干旱情况,将干旱等级标准按不同时间尺度进行了调整.根据调整后的等级标准,对乌海地区的干旱情况进行了分析。

This paper analyzes and compares precipitation anomaly percentage index and M index. The result shows that precipitation anomaly percentage index is suitable to Wuhai area,so it is used as drought index in Wuhai area. According to actual situation,drought grade is adjusted. Based on new drought grade, this paper analyzes drought instance of Wuhai area.