摘要
根据2008年6月至2011年11月黄土高原半干旱区油松人工林林内降雨定位观测数据,就该地区油松林内降雨再分配规律进行研究,并对不同立地条件下回归模型的结果进行分析。结果表明:穿透雨量、树干茎流量、林冠截留量与降水量均呈极显著的线性关系(P<0.01),穿透雨率和树干茎流率与降雨的关系可用非线性曲线表示;林冠截留率随降雨量的增加呈双曲线下降,林冠截留率受降雨量、降雨持续时间等因子的影响;从拟合回归的参数值来看,不同年份、不同林冠下的降雨特征存在差异,回归模型参数呈现不稳定性。
Based on the observed data of rainfall in the Pinus tabulaeformis forests within the semi-arid areas of the Loess Plateau from June 2008 to November 2011,the rainfall redistribution lows were investigated and their results of regression models were analyzed under different conditions.The results show that the through-fall,stem-flow and canopy interception had significant linear relationships with rainfall(P<0.01),and the relationships of through-fall ratio and stem-flow ratio with rainfall could be described with non-linear curves.The canopy interception rate decreased hyperbolically with the increase of rainfall,being significantly correlated with the rainfall amount,duration,and etc.By viewing from the fitted regression parameter values,there were differences in rainfall characteristics under different years and different canopy,and the regression model parameters presented instability.
出处
《中南林业科技大学学报》
CAS
CSCD
北大核心
2013年第5期79-84,共6页
Journal of Central South University of Forestry & Technology
基金
国家自然科学基金项目(30170769):华林中心科学试验示范林功能恢复与提升研究(CAFYBB2012004)
关键词
油松人工林
差异性分析
降雨再分配
穿透雨
树干茎流
林冠截留
Pinus tabulaeformis artificial forests
difference analysis
rainfall redistribution
through-fall
stem-flow
canopy interception
