1. 长安大学水利与环境学院,西安,710054
2. 长安大学旱区地下水文与生态效应教育部重点实验室,西安,710054
3. 中国水利水电科学研究院水利部防洪抗旱减灾工程技术研究中心,北京,100038
4. 长安大学水与发展研究院,西安,710054
5. 陕西省引汉济渭建设工程有限公司,西安,710054
[ "陈淑红(1996-),女,甘肃庆阳人,硕士研究生,主要从事水文学及水资源研究。E-mail:1720639632@qq.com" ]
纸质出版:2022
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陈淑红, 刘宇, 刘招, 等. 基于SPEI指数泾河流域近50年干旱时空演变特征[J]. 水土保持学报, 2022,36(2):181-188.
CHEN Shuhong, LIU Yu, LIU Zhao, et al. Temporal and Spatial Characteristics of Drought in the Jinghe River Basin in the Past 50 Years Based on the SPEI Index[J]. 2022, 36(2): 181-188.
陈淑红, 刘宇, 刘招, 等. 基于SPEI指数泾河流域近50年干旱时空演变特征[J]. 水土保持学报, 2022,36(2):181-188. DOI: 10.13870/j.cnki.stbcxb.2022.02.024.
CHEN Shuhong, LIU Yu, LIU Zhao, et al. Temporal and Spatial Characteristics of Drought in the Jinghe River Basin in the Past 50 Years Based on the SPEI Index[J]. 2022, 36(2): 181-188. DOI: 10.13870/j.cnki.stbcxb.2022.02.024.
基于泾河流域内外14个国家气象站1971-2019年逐日气象资料
使用降水和潜在蒸散数据得到不同时间尺度标准化降水蒸散指标(SPEI)
并结合反距离权重插值(IDW)、Mann-Kendall趋势检验、Morlet小波分析等方法
分析了泾河流域干旱时空演变特征。结果表明:近50年来泾河流域总体较干旱
但年际及春夏干旱趋势有所减轻
干旱事件易发生的季节次序为秋季>春季>夏季>冬季;年干旱在2011年发生突变
春、秋、冬干旱分别在1994年、2010年、1996年发生显著突变(P<0.05);跨越夏秋季的持续性干旱事件发生次数最多
其中秋季持续性干旱事件发生概率最大。研究结果对泾河流域抗旱预警工作以及社会经济发展具有重要意义。
Based on daily meteorological data from 14 national meteorological stations inside and outside the Jinghe River Basin from 1971 to 2019
the standardized precipitation evapotranspiration indicators (SPEI) were obtained using the precipitation and potential evapotranspiration data at different time scales. Through the inverse distance weighted interpolation (IDW) and Mann-Kendall trends Test
Morlet wavelet analysis and other methods
the temporal and spatial evolution characteristics of drought in the Jinghe River Basin were analyzed. The results showed that in the past 50 years
the Jinghe River Basin was generally arid
but the drought degree had been reduced. The seasons drought events occurred possibly was autumn>spring>summer>winter. The annual drought had an abrupt change in 2011
while the spring
autumn and winter droughts mutated significantly respectively in 1994
2010
and 1996 (P<0.05). The number of persistent drought events spanning summer and autumn occurred the most
and the probability of persistent drought events in autumn was the greatest. These findings are of great significance for the early warning of drought resistance and agricultural development in the Jinghe River basin.
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