摘要
在降水变化趋势分析基础上,结合模比离差系数累积曲线及统计学方法分析了流域降水的时空变化特征。结果表明,老哈河流域降水存在较大的时空变异性,流域降水量有逐年增加趋势,雨日有逐年减少趋势,降水量和雨日呈正相关性;流域降水量由西南往东北明显递减,雨日分布为上下游偏大、中游偏少;流域降水量随地面高程的增加而显著增加,高程每增加1 km降水量平均增加116 mm。
This text is based on the daily precipitation data of 52 meteorological sites from 1964 to 2005, using the traditional methods, the difference product curves and the Kriging analysis of the trend of precipitation over the spatial and temporal in Laoha River Basin. The results show that the precipitation has a greater variability over the time and the space： the precipitation mainly concentrated in the summer months of 6, 7, 8,which accounts for 65 %-75 % of the annual precipitation; the precipitation has a slowly upward trend year by year, but the rain day has a trend of decreasing, the precipitation and rain day has a great positive correlation. The precipitation has a trend of declining from the southwest to the northeast, the precipitation which is more than 500ram mainly distributed in the northwest corner and the southwest corner, but the rain day is much less in the middle of the Laoha River Basin. The precipitation has a trend of enhance along with the elevation, when the elevation increases 1 kilometer the annual precipitation increases 116mm.. Key words：precipitation; time and space disbritution; change characteristic
出处
《水电能源科学》
北大核心
2009年第1期1-4,共4页
Water Resources and Power
基金
国家重点基础研究发展规划基金资助项目(2006CB400502)
高等学校学科创新111引智计划基金资助项目(B08048)
教育部科学技术研究重大基金资助项目(308012)
关键词
降水
时空分布
变化特征
老哈河流域
precipitation
time and space disbritution
change characteristic
作者简介
江善虎（1983-），男，硕士研究生，研究方向为水文水资源及水文过程模拟，E—mail：Hik0216@yahoo．cn
通讯作者：任立良（1963-），男，教授、博导，研究方向为水文水资源及水文过程模拟，E-mail：RLL@hhu．edu．cn
