彰武县境内柳河流域降水、流量、含沙量的变化规律

摘要

Change trend and correlation of precipitation, discharge and sediment concentration( 1968-2009) in Iiuhe river basin in Zhangwu county were analyzed to study change regulation of precipitation,discharge and sediment concentration in the basin systematically. The results showed that precipitation in autumn,sediment concentration in every season and the whole year significantly decreased, discharge in every season and the whole year decreased significantly or very significantly. There were very significant positive correlations between discharge and sediment concentration in spring and winter, precipitation and discharge in summer, discharge and sediment concentration in the whole year, very significant positive correlation among precipitation, discharge and sediment concentration in autumn, significant positive correlation between precipitation and sediment concentration in the whole year.%为了解彰武县境内柳河流域降水、流量、含沙量的变化规律,分析了该流域1968-2009年的降水、流量、含沙量的时间序列变化趋势及其相关性.结果表明,该段流域秋季降水呈极显著下降趋势,各季节及年际流量均呈显著或极显著下降趋势,各季节及年际含沙量均呈极显著下降趋势;春季、冬季的流量与含沙量及夏季的降水与流量呈极显著正相关,秋季降水、流量、含沙量之间及年际降水与流量、流量与含沙量均呈极显著正相关,年际降水与含沙量呈显著正相关.