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.
江淮分水岭区农作物干旱时空变化特征
- Title:
- Analysis on Spatiotemporal Characteristics of Crop Drought in Jianghuai Watershed
- Keywords:
- continuous days without available precipitation; crops; drought; spatiotemporal characteristics; daily drought frequency
- 分类号:
- S166
- 摘要:
- 利用江淮分水岭区17个市、县气象台站1980-2009年降水数据，基于改进的无有效降水连续日数干旱评估指标，分析农作物干旱时空变化特征。结果表明：（1）春播夏收型农作物在寿县、长丰、定远、明光一带以北地区易发生春旱；夏播秋收型农作物在寿县、淮南、长丰、定远、凤阳一线多形成夏秋旱，西南和东北地区也较易发生夏秋旱；春播秋收型农作物生长期内大部分地区秋旱多发，其中寿县、肥东东南部和全椒西南部部分为秋旱高发地区；越冬型作物在明光北部、来安北部、淮南西南部以及寿县北部等地多生秋冬春旱，其他地区也易发生秋冬春旱，且持续时间均较长。（2）从年际演变趋势看，夏播秋收型、越冬型农作物干旱范围和强度均略有增长，春播秋收型农作物干旱强度微增长、范围略减小；春播夏收型农作物干旱强度和范围均呈微减的趋势。总体上，研究区域干旱强度略有上升，且北部高于南部，越冬型作物高于其他类型农作物，研究结果可为区域农业生产防旱提供科学依据。
- 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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备注/Memo
收稿日期:2017-03-07;改回日期:2017-05-04。
基金项目:滁州学院科研启动基金项目（2014qd032）；安徽省高校自然科学研究一般项目（KJ2016B04）；2011协同创新中心规划项目（2015GH02）
作者简介:李宝(1976-),男,安徽濉溪人,硕士,高级工程师,研究方向:GIS与RS集成应用技术。E-mail:huyangzjj@163.com
通讯作者:胡阳(1995-),男,安徽池州人,学士,研究方向:水土资源与生态环境。E-mail:151618933@qq.com