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利用重庆市11个国家气象站1960-2013年的逐日降水量资料,按照《重庆市气象灾害标准》统计1960-2013年农作物生长季的干旱次数和强度,并采用数理统计、地统计分析、小波分析等方法,研究重庆市农作物生长季干旱时空分布规律.结果表明:干旱发生次数年代际差异明显,且干旱长期变化具有阶段性和周期性;近10年来,高强度等级干旱发生频率有上升趋势;重庆市干旱主要发生在渝西南地区和中部地区以及渝东北地区.研究成果可为重庆市不同区域农作物布局和防旱避灾提供科学依据.
Based on the daily precipitation data of 11 national meteorological stations in Chongqing from 1960 to 2013 and the data of Chongqing Meteorological Disaster Standard in 1960 to 2013, the number and intensities of drought in the growing season were calculated and analyzed using mathematical statistics, geostatistical analysis, wavelet The results showed that the decadal differences of drought occurrence times were obvious, and the long-term changes of drought had the characteristics of periodicity and periodicity. In the past 10 years, the occurrence frequency of drought with high intensity level had an upward trend ; Drought in Chongqing mainly occurred in the southwest and central regions of Chongqing and northeast of Chongqing.The results can provide scientific basis for the crop layout and drought prevention and mitigation in different regions of Chongqing.