【摘要】 基于2014年5—9月的野外试验数据,采用野外观测与统计分析相结合方法,研究了祁连山排露沟流域5种典型灌丛:吉拉柳(Salix gilashanica)、箭叶锦鸡儿(Caragana jubata)、金露梅(Potentilla fruticosa)、鲜黄小檗(Berberis diaphana)和甘青锦鸡儿(Caragana tangutica)灌丛降雨截留特征,分析了降雨量对灌丛穿透雨量和截留量的影响。结果表明:研究期间共观测到降雨40次,年降雨总量为292.4mm,其中2~10mm的降雨事件出现次数最多;5种灌丛穿透雨量、截留量分别为吉拉柳灌丛183.5,108.9 mm;甘青锦鸡儿灌丛174.3,73.5 mm;箭叶锦鸡儿灌丛168.8,123.6mm;金露梅灌丛166.1,106.4mm;鲜黄小檗灌丛165.7,82.1mm;5种灌丛穿透雨量和截留量与降雨量均呈显著线性正相关(p<0.001);而穿透率和截留率与降雨量均以对数函数拟合较好(p<0.001)。更多还原

【Abstract】 Based on the field experimental data from May to September 2014,we took the five typical shrubs:Salix gilashanica,Caragana jubata,Dasiphora fruticosa,Berberis diaphana,and Caragana tangutica of Pailugou Watershed in Qilianshan Mountains as test samples,and investigated the characteristics of rainfall interception of five typical shrubs in Qilianshan Mountains by field survey and statistical analysis method,and analyzed impact of rainfall characteristics on rainfall redistribution of shrubs.Results showed that 40 events of rainfall were observed,and the total amount of rainfalls was 292.4mm,as a whole,the rainfall events with 2~10mm had the highest frequency.The amounts of through fall of Salix gilashanica,Caragana tangutica,Caragana jubata,Dasiphora fruticosa and Berberis diaphana,were 183.5mm,174.3mm,168.8mm,166.1mm and 165.7mm,respectively.And interception amounts were 108.mm 9,123.6mm,106.4mm,82.1mm and 73.5mm,respectively.The amounts of through fall and interception of Salix gilashanica,Caragana jubata,Dasiphora fruticosa,Berberis diaphana,and Caragana tangutica increased in a significant positive linear correlation with increase of rainfall depth(p<0.001).The relationship of through fall percentage and interception percentage of shrubs with rainfall could be fitted by logarithmic curve(p<0.001).更多还原