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| DOI：10.13522/j.cnki.ggps.20180419 |
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| Spatiotemporal Distribution of Flooding Events at Paddy Fields in the Middle-low Reaches of the Yangtze River |
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WANG Huifang, WU Li, LUAN Qingzu, GUO Wei, WANG Qian, XING Pei, ZHANG Shuo, GAO Yanhu
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1. Institute of Urban Meteorology, CMA, Beijing 100089, China; 2. Beijing Municipal Climate Center, Beijing 100089, China; 3. Fujian Meteorological Service Center, Fuzhou 350001, China; 4. Henan Agricultural university, Zhengzhou 450002, China; 5. Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
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| Abstract: |
| 【Objective】Waterlogging and flooding are natural hazards facing agricultural production, and understanding their spatiotemporal distribution is critical to safeguarding food production.【Method】Taking middle-low reach of Yangtze River basin as an example, this paper studied the spatiotemporal distribution of waterlogging/flooding occurring at the key growing stage of rice in 1971—2012. Using data measured from 426 weather stations, we analyzed the frequency and intensity of the flooding, as well as the season it occurred.【Result】During the studied period, most waterlogging/flooding were at moderate to severe level, with the moderate occurring mainly in Hubei, Hunan, Jiangxi and Zhejiang province, and the sever in Hunan, Jiangxi and Zhejiang. Catastrophic flooding occurred in Anhui and Jiangsu. Overall, inter-annual flooding did not show significant difference despite a slight increase in the 1990 s followed by a decease. Between July to August, early rice was at filling stage and the later rice was at jointing stage, occurrence of flooding in this period could have a devastating impact on rice growth. 【Conclusion】More weather data are needed for northern Anhui, Jiangsu, Hunan, Jiangxi and Zhejiang when the early rice was at its filling stage and the second rice was at its jointing-booting stage. Drainage facilities need renovation in order to ameliorate flooding. |
| Key words: rice; flood disaster; temporal and spatial distribution characteristics; the middle and lower reaches of Yangtze River |
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