黄土高原人工油松林林冠截留动态过程研究

林冠截留量的大小直接影响着大气降水产生地表径流量的多少 ,也决定着森林涵蓄降水能力的大小 ,是评价森林保持水土效益的关键指标之一。因此 ,一直是森林水文和水土保持研究的重点 ,特别是林冠截留的动态过程的研究 ,对揭示径流、泥沙过程有积极的意义。由于影响林冠截留过程因素复杂 ,目前国内外在林冠截留动态方面的研究较少1～ 3] ,缺乏好的模型描述此过程4～ 7] ,限制了森林保持水土机理研究的进展。研究林冠截留的动态过程不仅能够阐明森林保持水土的机理 ,而且对研究林地土壤侵蚀过程有重要意义。1　研究地区与方法1 1　自然概况试…

Intercepting Dynamic Processes of Artificial Pinus tabulaeformis Forest Canopy on Loess Plateau

The intercepting dynamic processes of P.tabulaeformis forest canopy have been studied by local measuring methods for evaluating forest benefits of soil and water conservation and explaining mechanism of soil and water conservation. The result showed that interception amount of the canopy averaged in six-years was 104.8mm and interception rate was 23.7%.The intercepting processes has a limited increasing processes with raining time.The maximum value of interception amount occurred in the middle process.Then intercepting amount changes like a wave, which can be described using the combination of linear and sine functions