| 基于SPEI指数泾河流域近50年干旱时空演变特征 |
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| 引用本文： | 陈淑红,刘宇,刘招,曹林顺,余玉聪,杨舟.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):181-188,196. |
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| 作者姓名： | 陈淑红 刘宇 刘招 曹林顺 余玉聪 杨舟 |
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| 作者单位： | 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. 长安大学水与发展研究院, 西安 710054;4. 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;5. 陕西省引汉济渭建设工程有限公司, 西安 710054 |
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| 基金项目： | 陕西省自然科学基金会联合基金项目（2021JLM-54）；陕西省重点研发计划项目（2019SF-237）；国家111引智计划项目（B08039） |
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| 摘 要： | 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。
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| 关 键 词： | 干旱 SPEI指数 趋势分析 时空演变 潜在蒸散 泾河流域 |
| 收稿时间： | 2021/9/12 0:00:00 |
Temporal and Spatial Characteristics of Drought in the Jinghe River Basin in the Past 50 Years Based on the SPEI Index |
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| CHEN Shuhong,LIU Yu,LIU Zhao,CAO Linshun,YU Yucong,YANG Zhou.Temporal and Spatial Characteristics of Drought in the Jinghe River Basin in the Past 50 Years Based on the SPEI Index[J].Journal of Soil and Water Conservation,2022,36(2):181-188,196. |
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| Authors: | CHEN Shuhong LIU Yu LIU Zhao CAO Linshun YU Yucong YANG Zhou |
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| Institution: | 1. School of Water Conservancy and Environment, Chang''an University, Xi''an 710054;2. Key Laboratory of Arid Land Hydrology and Ecological Effects of Ministry of Education, Chang''an University, Xi''an 710054;3. Institute of Water and Development, Chang''an University, Xi''an 710054;4. China Water Resources Hydropower Research Institute, Ministry of Water Resources, Flood Control and Drought Relief Engineering Technology Research Center, Beijing 100038;5. Hanjiang-to-Weihe River Valley Water Diversion Project Construction Co. Ltd., Xi''an 710054 |
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| Abstract: | 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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| Keywords: | drought SPEI index trend analysis temporal and spatial evolution potential evapotranspiration Jinghe River Basin |
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