基于GRACE与降水的干旱研究分析

Drought Research and Analysis Based on GRACE and Precipitation

针对干旱问题,采用GRACE重力卫星数据进行反演监测,并对该技术在监测应用中的问题进行了研究。以陕西省与四川省为例,分析了陆地总水储量及降水对干旱的影响,采用基于两者相结合进行计算的干旱指数来检测干旱的发生,并与实际干旱情况及其他干旱指数进行对比,结果表明:该指数能够较好地检测出实际干旱事件且与其他干旱指数有较强的相关性。

In this paper,the grace gravity satellite data is used for inversion monitoring,and the following problems in the application of this technology in monitoring are studied.Taking Shaanxi province and Sichuan province as examples,this paper analyzes the impact of land total water storage and precipitation on drought,uses the drought index calculated based on the combination of the two to detect the occurrence of drought,and compares it with the actual drought situation and other drought indexes.The results show that the index can detect the actual drought events and has a good correlation with other drought indexes.