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| 引用本文: | 杨云源,彭海英,陈 瑞,等.基于CSPI的云南省1961—2016年六大流域季节干旱差异分析[J].灌溉排水学报,2022,41(8):130-138. |
| YANG Yunyuan,PENG Haiying,CHEN Rui,et al.基于CSPI的云南省1961—2016年六大流域季节干旱差异分析[J].灌溉排水学报,2022,41(8):130-138. |
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| 基于CSPI的云南省1961—2016年六大流域季节干旱差异分析 |
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杨云源，彭海英，陈 瑞，张 洁，刘新有
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1.楚雄师范学院 资源环境与化学学院，云南 楚雄 675000；2.云南财经大学 国土资源与持续发展研究所，
昆明 650051；3.楚雄师范学院 管理与经济学院，云南 楚雄 675000；4.楚雄医药高等专科学校，
云南 楚雄 675000；5.云南省滇中引水工程建设管理局昆明分局，昆明 650221
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| 摘要: |
| 【目的】从季节尺度研究云南省六大流域中旱、重旱、特旱的差异。【方法】使用1961—2016年云南省124个气象站逐月降水等数据，建立修正泰森多边形法计算流域降水量，建立修正的标准化降水指数（CSPI，Corrected-SPI），计算干旱指数并划分干旱等级。以中旱、重旱、特旱为切入点，使用流域内的气象站季节干旱强度、站次，流域级的冬、春季干旱强度、站次，利用Mann-Kendall趋势检验进行云南省六大流域干旱差异分析。【结果】6个春旱型气象站、71个冬旱型气象站、47个强冬旱型气象站跨流域连片分布；六大流域干旱以冬旱为主，春旱次之；金沙江流域冬、春旱灾最为严峻，红河、澜沧江流域旱情次之；云南省六大流域1961—2016年冬、春旱趋缓。【结论】金沙江流域中游（昆明、楚雄大部）、红河流域中游、澜沧江下游（景洪、普洱）局地干旱应被引起重视。 |
| 关键词: 流域干旱；修正SPI；修正泰森多边形；干旱差异；云南省 |
| DOI：10.13522/j.cnki.ggps.2021498 |
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| Seasonal Droughts from 1961 to 2016 in the Six Basins Across Yunnan Province |
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YANG Yunyuan, PENG Haiying, CHEN Rui, ZHANG Jie, LIU Xinyou
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1.School of Resources, Environment and Chemistry, Chuxiong Normal University, Chuxiong 675000, China;
2. Institute of Land Resources and Sustainable Development, Yunnan University of Finance and Economics, Kunming 650051, China;
3. School of Management and Economics, Chuxiong Normal University, Chuxiong 675000, China; 4. Chuxiong Medical College, Chuxiong 675000, China; 5. Construction and Administration Bureau of the Central Yunnan Water Diversion Project, Kunming 650221, China
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| Abstract: |
| 【Objective】 Climate change will increase the frequency of extreme weathers such as drought and flooding. The aim of this paper is to analyze the seasonal droughts occurring from 1961 to 2016 in the six main basins across Yunnan province.【Method】The analysis was based on monthly precipitation measured from 124 meteorological stations across the province from 1961 to 2016. The basin rainfall was calculated using the corrected Thiessen polygon method, and the CSPI (corrected SPI) method was used to calculate the drought index by dividing droughts into moderate drought, severe drought and special droughts. Seasonal drought intensity, occurring time of the droughts at the meteorological stations in different basins were used to analyze the spatiotemporal variation in the drought across the province. 【Result】 There are 6 spring drought type meteorological stations, 69 winter drought type meteorological stations and 49 strong winter drought type meteorological stations across the province. The drought in all basins occurred mainly in winter and spring. Spatially, Jinsha basin saw the severest droughts in in winter and spring, followed by Honghe and Lancang basins. Temporally, there have been a decrease in winter and spring droughts in all six basins over the 65 years. 【Conclusion】The corrected Thiessen polygon method and CSPI method are adequate to calculate spatiotemporal variation in droughts at basin scale. There were local seasonal droughts occurring in the middle reaches of Jinsha basin (Kunming and Chuxiong) and the middle reaches of Honghe basin and the lower reaches of Lancang basin (Jinghong and Pu’er). |
| Key words: basin drought; corrected SPI; Modify Thiessen Polygon; drought difference; Yunnan Province |
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