基于SPI的黄河谷地气象干旱特征

Analysis of Drought Characteristics in Yellow River Valley of Qinghai Province Based on SPI

利用青海省贵德县气象局观测的1961~2017年逐月降水量资料,应用标准化降水指数(SPI)评价贵德地区干旱情况。结果表明,在1961~2017年间,贵德地区发生干旱的次数较多,干旱频率为38.2%。春季、夏季和秋季干旱频率分别为26.3%、24.6%、31.6%。

Data at Guide county observatory station in Qinghai Province for 1961-2017 precipitation was utilized to obtain annual drought index and seasonal drought index in Yellow River Valley based on standardization precipitation index (SPI). The result showed that there were many droughts in the Guide area, 38.2% of which occurred from 1961 to 2017. The drought frequency in spring, summer and autumn was 26.3%, 24.6% and 31.6%, respectively.