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[1]LI Bao,HU Yang,WANG Guangsheng,et al.Analysis on Spatiotemporal Characteristics of Crop Drought in Jianghuai Watershed[J].Research of Soil and Water Conservation,2017,24(06):227-232,237.

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Analysis on Spatiotemporal Characteristics of Crop Drought in Jianghuai Watershed

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 24 Number of periods: 2017 06 Page number: 227-232,237 Column: Public date: 2017-11-24

Title:: Analysis on Spatiotemporal Characteristics of Crop Drought in Jianghuai Watershed

Author(s):: LI Bao¹, HU Yang², WANG Guangsheng², LIU Yuchan², LI Peng²; 1. Provincial Fundamental Geomatic Center of Anhui, Hefei 239000, China;
2. Anhui Center for Collaborative Innovation in Geographical Information Integration and Application, Chuzhou University, Chuzhou, Anhui 239000, China

Keywords:: continuous days without available precipitation; crops; drought; spatiotemporal characteristics; daily drought frequency

CLC:: S166

DOI:: -

Abstract:: Based on the precipitation data of 17 city and county meteorological offices and stations from 1980 to 2009 in Jianghuai watershed, we used the improved unefficient precipitation consecutive drought day evaluation index to analyze drought indexes of crops sown in the spring and harvested in the summer, crops sown in the summer and harvested in the autumn, crops sown in the spring and harvested in the autumn, winter crops in nearly 30 years and got the evolution characteristics of the spatial pattern of drought duration and drought frequency, and analyzed the inter-annual variation. Applying daily frequency of drought, we analyzed the dynamic evolution characteristics of drought during the crop growth period. The results showed that:(1) spring summer crops were prone to drought in Shouxian, Fengyang; cops sown in the summer and harvested in the autumn were easier to suffer drought in the summer in Shouxian County, Huainan, Dingyuan, Changfeng, Fengyang line, southwest and northeast; the drought of Spring sowing-autumn harvesting crops most occurred in autumn, especially in Shouxian, southeast Feidong and Quanjiao southwest part in spring-autumn and winter; drought of overwintering crops occurred frequently in north of Mingguang and Lai an, the southwest of Huainan, north of Shouxian, and other areas, the drought not only occurred easily and lasted a longer duration in these areas; (2) from inter-annual variation trend of summer sowing-autumn harvesting and over winter crops, the scope and intensity of drought slightly increased; the drought strength of spring sowing-autumn harvesting crops also grew slightly and the scope slightly decreased, drought intensity and range of spring sowing-summer harvesting crops presented the slightly decreasing trend. On the whole, drought intensity increased slightly in the area, it was higher in the north than the south, and drought intensity of overwintering crops was higher than other crops. These results can provide scientific basis for regional agriculture production and drought prevention.

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