| Cite this article: | 陈金华,刘瑞娜,吴文革,等.江淮不同亚区冬小麦涝渍害气候风险时空演变[J].灌溉排水学报,2022,():-. |
| Chen Jinhua,Liu Ruina,Wu Wenge,et al.江淮不同亚区冬小麦涝渍害气候风险时空演变[J].灌溉排水学报,2022,():-. |
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| Spatio-temporal evolution of climate-induced risk of waterlogging disaster for winter wheat in each Jianghuai sub-region |
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Chen Jinhua1, Liu Ruina2, Wu Wenge3, Du Xiangbei3, Zhou Yongjin3, Kong Lingcong3, Dai Qigen4, Huo Zhongyang4
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1.Anhui Agrometeorological Center /Anhui Key Lab of Atmospheric Science and Satellite Remote Sensing;2.Anhui Agrometeorological Center / Anhui Rural Comprehensive Economic Information Center;3.Rice Research Institute, Anhui Academy of Agriculture Sciences;4.Agriculture College of Yangzhou University / Research Institute of Rice Industrial Engineering Technology
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| Abstract: |
| 【Background】Waterlogging is one of the main disasters in winter wheat planting in Jianghuai Region.【Objective】The objective is to reveal the temporal and spatial characteristics of climate-induced risk for winter wheat waterlogging disaster in Jianghuai sub-region scale. It is helpful to construct a practicability waterlogging defense measures for different regions.【Method】Using the meteorological data from 143 surface meteorological observation stations in study region in Anhui and Jiangsu province, the annual mean data series of monthly precipitation and crop potential evapotranspiration in winter wheat growing season were calculated. and the study region was divided into several climatic sub-regions, by analyzing the data series with the methods of Principal Component Analysis and K-means Cluster. Then the temporal and spatial variation of winter wheat waterlogging disaster was revealed in each sub-region, based on the daily historical sequence data from the standardized early precipitation evapotranspiration index. 【Result】(1)The area with the highest annual average occurrence days and times for winter wheat waterlogging were in Jianghuai Watershed Area and East of the Yangtze River from emergence to overwintering stage (November to February of the next year). However, the spatial distribution type of waterlogging from spring regreening to maturation stage (March to May) was a zonal distribution of high in the south and low in the north. (2)The annual average occurrence days of waterlogging for each 10-days in the whole growing season shown an obvious low-high uphill distribution type in West along the Yangtze River and High Mountain Region, approximate horizontal distribution type in Jianghuai Watershed Area and East of the Yangtze River, and high-low downhill distribution type in North of the Huaihe River respectively. (3)The inter-annual variation of waterlogging occurrence days for each 10-days in the whole growing season in the five sub-regions, showed a significant increasing trend from late-November to mid-February of the next year, and the variation coefficients of them were generally high in each sub-region.【Conclusion】Climate-induced risk for winter wheat waterlogging in Jiangsu and Anhui provinces is generally high, and there are obvious different spatio-temporal characteristics in the five sub-regions. Climate adaptability defense strategies in different subregions should be put forward. |
| Key words: Jianghuai Region; winter wheat; climate-induced risk; waterlogging disaster; spatio-temporal evolution |
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