苏南丘陵区麻栎林冠层水文效应及其影响因素  

A study on characteristics of rainfall redistribution in Quercus acutissima forest in the hilly areas of southern Jiangsu province

作　　者：韩诚[1] 张金池[1] 庄义琳[1] 庄家尧[1] 刘鑫[1] 杨志华[1] 顾哲衍[1] 

机构地区：[1]南京林业大学森林资源与环境学院,江苏南京210037

出　　处：《南京林业大学学报（自然科学版）》2014年第2期93-98,共6页Journal of Nanjing Forestry University：Natural Sciences Edition

基　　金：国家林业公益性行业科研专项项目(201104055-1);国家自然科学基金项目(31170663);江苏高校优势学科建设工程资助项目(PAPD)

摘　　要：为探讨苏南丘陵区麻栎林生态水文过程及其影响因素,采用定位观测的方法,于2012年4月至9月对麻栎林的降雨分配过程进行了监测研究。结果表明:研究期内,累计降雨量470.7 mm,平均场降雨量10.0 mm,小雨占据降雨事件的绝大部分,频率达到70.21%。穿透雨量、树干径流量、林冠截留量与降雨量呈极显著正相关关系。根据回归模型确定了林冠部分的持水能力和树干持水能力分别为0.87 mm和0.11 mm,形成树干径流的最小雨量为3.42 mm。林冠截留率与降雨量、降雨强度以及空气湿度有显著的负相关关系。小雨量级下,随月平均叶面积指数的增加各月林冠截留率增大。月平均林冠截留率与叶面积指数有极显著的线性关系。林冠平均截留率为20.48%。In order to explore the eco-hydrological process of Quercus acutissima forest in the hilly area of southern Jiang-su province and its influencing factors, rainfall distribution process of Q. acutissima forest was studied by using fixed-point observation method, from April to September 2012. The results showed that：during the study period, the cumula-tive precipitation was 470.7 mm and average precipitation was 10.0 mm and the small rainfall occupied most of the rain-fall events, whose event frequency was 70.21% of the whole. There were significant positive correlation among through-fall, stemflow and canopy with rainfall. According to the regression models, the canopy storage capacity and the stem storage capacity of Q. acutissima were 0.87 mm and 0.11 mm respectively. The critical minimum rainfall for the occur-rence of stemflow was 3.42 mm rainfall, rainfall intensity and air humidity had remarkable negative correlation with cano-py interception rate. Monthly canopy interception rate increasing with the increase of monthly mean LAI under light rain. There was a significant linear relationship between leaf area index and the monthly mean rate of canopy interception. The average rate of canopy interception reached 20.48%.

关 键 词：麻栎 穿透雨 树干径流 林冠截留 苏南丘陵区 

分 类 号：S715[农业科学—林学]