沿坝地区天然次生林对降雨再分配的影响  

Study on Effect of Natural secondary forest on Rainfall Redistribution Processes Along the Dam Area

作　　者：张宁[1] 郭宾良 张国强[3] 张春茹[3] 张楠[3] 张建华[3] 谷建才[1] 

机构地区：[1]河北农业大学,河北保定071000 [2]保定市林木种苗管理站,河北保定071000 [3]河北木兰围场国有林场管理局,河北围场068450

出　　处：《水土保持研究》2015年第6期99-102,109,共5页Research of Soil and Water Conservation

基　　金：河北省科技厅"河北省滦河流域水源林经营关键技术研究与示范"(15227652D);河北省科技厅"国有林场经营管理机制存在问题及改革模式研究"(13457525)

摘　　要：为了探究天然次生林对降雨再分配的过程,通过对沿坝地区的北沟林场内天然次生林进行穿透降雨、冠层截留和树干径流3个方面进行监测,结果表明:(1)穿透雨量和林冠截留占林外降雨量的比例比较大,树干径流量的比例则非常小,分别为59.46%,37.33%,3.21%。(2)穿透雨量和林外降雨呈现线性关系(R2=0.980 4),林冠截留量与林外降雨量也具有明显的幂函数关系(R2=0.823 4),树干径流与林外降雨量具有明显的线性相关关系(R2=0.909 8),并且都达到了极显著水平(p<0.01)。(3)根据穿透雨与林外降雨的方程y=0.8034x-1.7939,当林外降雨量高于2.23mm时会产生穿透雨;依据林外降雨与树干径流的方程y=0.0552x-0.1981,当林外降雨高于3.58mm时会产生树干径流;林冠在降雨再分配过程中起到了很重要的作用,形成了二次降雨。In order to explore the impact of natural secondary forest on rainfall redistribution process, natural secondary forest floor, penetrating rain, canopy interception and stemflow were monitored through the north ditch along the dam area. The results show that： （1） through the rain and outside the forest canopy intercep- tion accounted for a relatively large proportion of rainfall, runoff proportion trunk is very small, 59.46%, 37.33%, 3.21%, respectively; （2） through the rain and the rain forest outside have the linear relationship （_R2 =0. 980 4）, and outside the forest canopy interception of rainfall also has significant power function rela- tionship （R2 =0. 823 4）, trunk runoff and rainfall outside the forest have obvious linear correlation （R2= 0. 909 8）, and have reached a significant level （p^0.01） ; （3） according to the equation： y（outside the forest through the rain and rain）=0. 8034x-1. 7939, when the rainfall is higher than 2.23 mm outside the forest will produce rain penetration; according to the equation y outside the forest and tree trunks rainfall runoff= 0.0552x-0. 1981, when rainfall is higher than 3.58 mm outside the forest produces stem runoff; canopy plays a very important role in the redistribution of rainfall, the formation of a secondary rain.

关 键 词：天然次生林 降雨再分配 林冠截留 

分 类 号：S715[农业科学—林学]