摘要
采用连续定位观测的研究方法和小集水区技术,对豫南低山区针阔叶混交林等4种林型径流变化规律进行了研究。结果表明,落叶阔叶林、针阔叶混交林、毛竹林以及杉木林等4种林型均具有较强的涵养水源和保育土壤功能,坡面径流系数在1.06%~3.20%之间,土壤侵蚀强度均为微度侵蚀。坡面径流总量,落叶阔叶林>针阔叶混交林>杉木林>毛竹林;水土流失量,针阔叶混交林<落叶阔叶林<毛竹林<杉木林。4种林型坡面径流量与1次降雨量均存在显著的幂函数曲线回归关系,曲线回归相关系数分别达到0.886、0.919、0.913、0.868。针阔叶混交林小集水区年总径流量为547.19 mm,径流系数为34.8%,其中地下径流为498.39 mm,坡面径流仅为48.80 mm;月径流总量与降水量、蒸发量均存在显著的回归关系,可分别用幂函数和指数函数曲线式表示,曲线回归相关系数分别达到0.969、0.758。
Author has studied on variation of runoff of needle broad -leave forest in southern mountain of Henan province with continuing site specific long-term observation and watershed experiment technque.Result indicates four forest type have stronger soil and water conservation fimetion,inctudes deciduous broad-leaved forest, needle-broad-leave forest, Cuninghamia lanceolata, Phyllostachys pubescens. The grade surface runoff coefficients is at, 1.06% - 3.20%. The sail erosion strength is all tiny.The grade surface total ruuoff is :deciduous broad-leave forest 〉 needle-broad-leave forest 〉 Cuninghamia lanceolata 〉 Phyllostacl^ys pubescenssoil erosion is: needle-broad-leave forest 〈 deciduous broad-leave forest 〈 Phyllostachys pubescens 〈 Cuinghamia lanceolata Grade surface runoff of the four forest type exists notable power regression relation with the daily precipitation.The correlation coefficients of curve regression reached respectively 0.886, 0.919, 0.913 and 0.868.The total runoff of the needle-broadleave forest is 547.19 mm ,the runoff coefficient is 34.8%,including the groundwater is 498.39 mm and the gra(te surface r(moff is only 48.80 mm in watershed experiment area.The monthly total rtmoff existed notable regression relation in precipitation and evaporation,adopt power function and exponential function respectively. The correlation coefficients reached respectively 0.969 and 0.758.
出处
《河南林业科技》
2009年第4期16-20,共5页
Journal of Henan Forestry Science and Technology
基金
中国陆地生态系统定位观测研究网络资助项目
信阳市科技计划项目(200830)
关键词
森林类型
坡面径流
定位观测
径流系数
降雨量
forest type
grade surface runoff
site-specific observation
runoff coefficient
rainfall