摘要
根据沈阳市1959-2006年的降水资料,进行统计计算和频率分析,探讨了该地区降水时空分布特征及其枯丰变化趋势,总结了沈阳市多年平均降水的变化规律。结果表明:沈阳市多年平均降水量为606.6 mm,其变差系数为0.2,且多年平均降水具有缓慢下降的趋势;降水量年际、年内变化较大,且分配不均匀,汛期降水量(6-9月)大约占全年降水量的60%~90%,最大一日降水多发生在7、8月份;沈阳市多年平均降水量在空间上分布不均匀,南部地区大于北部地区,具有由南向北逐步减少的趋势。
Based on the precipitation data in Shenyang City from 1959 to 2006, the temporal-spatial distribution features and change tendency of wet and low water of precipitation are discussed through statistic calculation and frequency analysis, the variation rules of the average annual precipitation in Shenyang is summarized. The result shows that the average annual precipitation in Shenyang is 606. 6 mm, the coefficient of variation is 0. 2 and then it decreases slowly; the variation of annual and inter-annual precipitation is unevenly distributed, the precipitation amount in flood period (June^September) probably accounts for 60%~90~ of the annual precipitation, the maximum amount of daily precipitation mostly occurs in July and August. The spatial distribution of the average annual precipitation in Shenyang is also inhomogeneous, the southern area is greater than the northern area and has a tendency of reducing gradually from south to north.
出处
《节水灌溉》
北大核心
2008年第12期17-19,23,共4页
Water Saving Irrigation
基金
辽宁省教育厅科技攻关项目(05L385)
水利部"948"科技创新项目(CT200516)
关键词
沈阳市
降水特征
变化规律
Shenyang
precipitation features
variation rules