| 苏海民,黄园园.1957~2012皖北粮食产区降水变化特征研究[J].井冈山大学自然版,2017,(4):45-51 |
| 1957~2012皖北粮食产区降水变化特征研究 |
| VARIATION CHARACTERISTICS OF PRECIPITATION OF GRAIN-PRODUCING AREAS IN NORTHERN ANHUI PROVINCE DURING 1957~2012 |
| 投稿时间：2017-01-09 修订日期：2017-04-07 |
| DOI：10.3969/j.issn.1674-8085.2017.04.008 |
| 中文关键词: 皖北 趋势分析 不均匀系数 集中度(期) 小波分析 |
| 英文关键词: Northern Anhui Province trend analysis non-uniformity coefficient concentration degree (period) of precipitation wavelet analysis |
| 基金项目:安徽省高校优秀青年支持计划重点项目（gxyqzd2016347）；宿州学院学术技术骨干项目（2014XJGG06）；安徽省领军人才专项项目（2014lj01）；安徽省大学生创新项目（201510379115） |
|
| 摘要点击次数: 1780 |
| 全文下载次数: 2024 |
| 中文摘要: |
| 基于皖北粮食产区1957~2012年逐月降水资料，运用趋势分析、不均匀系数、集中度（期）和小波功率谱等方法，分析了皖北降水年内、年际等变异规律。结果表明：（1）皖北地区1957~2012年降水量总体表现为缓慢增加趋势，变化率为8.979 mm/10a。降水年代际变化较大：20世纪60年代、90年代和21世纪前十年为多雨期；50年代后期，70~80年代及2011和2012年降水偏少；（2）降水不均匀系数变化范围为0.509~1.576，50年代后期至60年代较不稳定，而2000年以后，降水不均匀性持续增加；从空间分布来看，降水均匀性由北向南渐少，但存在年代际变化差异；（3）降水集中度变化有微弱增加趋势，多年平均降水集中度为0.4777，降水分配遵从"均匀→集中→均匀→集中"过程；从空间上看，与不均匀系数变化特征大致一致。56年来皖北降水集中期最大降水主要集中在7月份。（4）从周期震荡来看，皖北降水周期以3~8a为主，而降水集中期的降水周期以2~4年为主。皖北是我国重要粮食产区，本研究可为该区农业灌溉规划与水资源管理提供重要依据。 |
| 英文摘要: |
| Based on the precipitation data during 1957~2012 in Northern Anhui Province, this paper illustrated and analyzed the characteristics of precipitation, including precipitation trend, non-uniformity coefficient, concentration degree (period) and wavelet analysis. The results showed that:(1) The annual precipitation showed a slow upward trend with 8.979 mm/10a. Inter-decadal variation of the precipitation was larger:the precipitation was abundant in 1960s, 1990s and the first decade of the 21st century but low in the last 50s, 1980s, 1990s, 2011and 2012. (2) The non-uniformity coefficient varied from 0.509 to 1.576, the precipitation was unstable from the later period in 1950s to 1960s, the non-uniformity of precipitation grew continuously after 2000s. In addition, the spatial variation of non-uniformity indicated decreasing from the north to the south, but there was significant inter-decadal change in different regions. (3) The precipitation concentration degree displayed a slight increasing trend, averaging 0.4777, and the distribution of precipitation was in compliance with the "uniform to centralized to uniform to centralized", which had the same characteristics of variation with non-uniformity coefficient in space. The annual precipitation concentrated in July during the past 56 years. (4) The periodicity of precipitation was approximately 3-8 years and the PCD periodicity was 2-4 years. Finally, this study can provide some reference for agriculture irrigation planning and managing water resources so as to boost food production in Northern Anhui Province. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|
