摘要
利用金沙江流域内44个气象站点的逐月降水数据资料,采用5 a滑动平均法、Mann-Kendall法、克里金插值法以及空间分布格局法,研究了该流域近55 a降水时空分布特征及变化趋势。结果表明：流域年降水量和非汛期降水量均呈不显著的增加趋势,汛期则呈不显著的减少趋势;流域年内降水分布不均匀,主要集中在汛期5~10月,降水量约占全年的89%;流域降水空间分布特征主要表现为由上游向下游呈逐渐增加的趋势;流域降水的空间格局具有较大差异,主要呈现出流域河源及其中游地区降水量增加,下游地区降水量减少的变化特征。
With the monthly precipitation data of 44 meteorological stations in the Jinsha River Basin,the five- year moving average method,Mann- Kendall method,the Kriging and spatial distribution were used to analyze the temporal and spatial distribution characteristics of precipitation and its variation trend. The results indicate that the annual and the non- flood season precipitation shows an indistinctive increasing trend,while the flood season precipitation shows an indistinctive decreasing trend; the annual precipitation is unevenly distributed,mostly concentrated in the flood season（ from May to October） that accounts for89% of the annual precipitation. The spatial distribution characteristics of precipitation is gradually increasing from upstream to downstream in the basin. The spatial precipitation distribution in the basin is significantly different,which shows an increasing trend in the river source area and the midstream,while a decrease trend in the downstream.
出处
《人民长江》
北大核心
2016年第18期39-43,共5页
Yangtze River
