建平地区近60年大气降水资源变化特征

Atmospheric Precipitation Resource Change Features in Jianping Area for Nearly 60 Years

为了充分认识和掌握建平地区降水的变化特征，提高水资源高效利用意识，采用1953～2012年大气降水资料，运用气候倾向率等分析手段，研究年、季降水变化特征。结果表明：建平地区近60年降水总体呈减少趋势，其中，年降水量近10年（2003～2012年）较前10年（1953～1962年）平均减少72mm；5～9月降水量近10年较前10年平均减少102mm。在四季中春季降水量增加；夏季降水量减少，近10年较前10年平均减少89 mm；秋季和冬季变化趋势不明显。本研究可为地方根据降雨情况安排农业生产提供理论支持和参考。

Atmospheric precipitation data from 1953 to 2012 is adopted,climate trend rate and other analysis means are utilized for studying annual and quarterly precipitation change features in order to fully understand and grasp change features of precipitation in Jianping,and increase efficient utilization awareness of water resources.The results showed that precipitation is decreasing as a whole in Jianping for nearly 60 years.Wherein,annual precipitation in nearly 10 years （2003 to 2012）is averagely decreased by 72mm compared with that in previous 10 years （1953 to 1962）.Precipitation from May to September in recent ten years is averagely reduced by 102mm compared with that in previous ten years.Spring precipitation is increased in the four seasons;summer precipitation is decreased,and precipitation in recent ten years is averagely reduced by 89mm compared with that in previous ten years.Changes in autumn and winter are not prominent. The study can provide theoretical support and reference for local government to arrange agriculture production according to precipitation.