林地枯落物层水文特征研究进展

 林地枯落物层作为森林水文功能的第2作用层,在涵养水源和保持水土中发挥了重大作用。通过综述国内外林地枯落物层水文特征的研究内容、室内外研究方法以及水文过程模拟的研究现状,指出目前我国在林地枯落物层水文特征研究过程中存在的主要问题是,研究内容单一和研究方法落后;认为野外定位试验对于全面了解枯落物层水文特征乃至水文过程具有重要意义,是今后研究的重点;同时,认为室内模拟降雨和变雨强研究能够深入了解野外枯落物层的降雨截持能力和截持机理;枯落物层水分动态是多水文过程和多因素综合作用的结果,物理模型的建立与参数的确定对于深入了解枯落物层的水分变化状况,合理营林等具有重要作用。

Review of research on hydrological characteristics of forest litter

As the second functionary layer in forest hydrologic process, the litter plays an important role on water cycling in the forestland. In this paper, the hydrological characteristics of forest litter, including study content, research method and hydrological characteristics simulation during the hydrological process was summarized. The singleness of study content and laggard method were the main problems in inland; It was indicated that the field settled experiment would be the keystone to study the hydrological characteristics of forest litter; During the course of rainfall simulation for the hydrological characteristics of litter, the rainfall intensity should be changed; The water dynamics of litter was resulted by multi-hydrological processes and influencing multi-factors. The establishment of physics model and the determination of its parameters are important to understand the water dynamics of litter layer and forest management.