| 摘要: |
| 为了评估生态公益林涵养水源服务功能，选择德庆县三叉顶自然保护区生态公益林，定位观测了2006年6月～2007年6月100次大气降水事件的截留分配效应。结果表明，观测期内降水总量为1317.60mm，林冠截留量、树干茎流量和穿透水量分别是318.37、87.85和911.38 mm，林冠截留率、茎流率和穿透率分别为24.16％、6.67％和69.17％。林外降水量大于1.3mm时才能观测到穿透雨，林外降水量达到3.0mm时才开始有树干茎流出现。林冠截留量、树干茎流量和穿透量与降水量均呈正相关，相关系数R2分别为0.7888、0.9577和0.9659；林冠截留率与林外降水量呈负相关，而树干茎流率和穿透率呈正相关，相关系数R2分别为0.8356、0.8034和0.8742。 |
| 关键词: 林冠截留，树干茎流，穿透雨，生态公益林，西江中下游 |
| DOI： |
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| 基金项目:广东省林业局科技专项“广东省森林生态效益监测站建设与研究”和国家“十一五”科技攻关项目“都市重要水源区水源涵养林构建技术试验示范”子项目“粤港澳城市群水源涵养林构建技术试验示范” |
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| Redistribution effects of tree canopy of Ecological Public Welfare Forest at Middle-lower Reaches of Xijiang River |
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Li ZhaoQin
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| Abstract: |
| The experiment was conducted in the ecological public welfare forest at middle-lower reaches of Xijiang River in order to evaluate its service function in water preserving capability. Total 100 precipitation cases from June 2006 to June 2007 were monitored and redistribution and interception effect of the tree canopy on precipitation was analyzed. The results indicated that total 1317.60 mm precipitation, canopy interception, step-flow, throughfall of the forest were318.37, 87.85, 911.38 mm, which account for 24.16％, 6.67％, 69.17％ of the total precipitation，respectively. Only when precipitation was over 1.3 mm and over 3.0 mm through fall and Stem-flow could be recorded respectively. Canopy interception, step-flow, throughfall was positively correlated with precipitation amount, and correlation coefficients were 0.7888, 0.9577, and 0.9659 respectively. Through canopy interception rate was negative1y related with precipitation amount, stern flow rate and through fall rate of the forest were positively correlated with precipitation amount, and correlation coefficient are 0.8356, 0.8034, 0.8742 respectively. |
| Key words: canopy interception, stepflow, throughfall, the ecological public welfare forest, middle-lower reaches of Xijiang River |
