| Cite this article: | 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,0,():-. |
| yangyunyuan,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,0,():-. |
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| Analysis on Differences of Drought in six Basins of Yunnan Province from 1961 to 2016 |
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yangyunyuan1, PENG HAIYING2, Chen Rui3, zhangjie4, liu xinyou5
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1.School of Resources, Environment and Chemistry, Chuxiong Normal University;2.Institute of Land Resources and Sustainable Development, Yunnan University of Finance and Economics, Kunming;3.School of Management and Economics, Chuxiong Normal University, Chuxiong;4.Chuxiong Medical College, Chuxiong;5.Construction and Administration Bureau of the Central Yunnan Water Diversion Project, Kunming
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| Abstract: |
| Purposes：In order to study the differences of moderate drought, severe drought and extreme drought in six watersheds of Yunnan Province from the seasonal scale of watershed. Methods：Based on the monthly precipitation data of 124 meteorological stations in Yunnan Province from 1961 to 2016, the corrected Thiessen polygon method was established to calculate the basin rainfall, and the CSPI (Correction SPI) method was established to calculate the drought index and divide the drought grade. Taking moderate drought, severe drought and special drought as the breakthrough point, the seasonal drought intensity and times of meteorological stations in the basin, and the drought intensity and times of winter and spring at the basin level were used to analyze the spatial-temporal differences of drought in six major basins of Yunnan Province. Finding：There are 6 spring drought type meteorological stations, 69 winter drought type meteorological stations and 49 strong winter drought type meteorological stations distributed across the basin; The drought in the six basins is mainly in winter, followed in spring; The drought in Jinsha River Basin is the most severe in winter and spring, followed by Honghe River and Lancang River; The drought in winter and spring in the six watersheds of Yunnan Province has slowed down in the past 65 years. Conclusion: The corrected Thiessen polygon method and CSPI method are feasible. Local drought in the middle reaches of Jinsha River (Kunming and Chuxiong in Central Yunnan), the middle reaches of Honghe River and the lower reaches of Lancang River (Jinghong and Pu'er) should be paid more attention to relieve. |
| Key words: Basin Drought; Corrected SPI; Modify Thiessen Polygon; Spatial and Temporal Differences of Drought; Yunnan Province. |
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