中文摘要：

以重庆四面山张家山林区针阔混交林和楠竹林为研究对象,采用室外染色和水分穿透曲线理论,结合Poiseulle方程和流量方程研究大孔隙与优先流之间的关系。结果表明,混交林和楠竹林两种林地在0-10cm层稳定出流速率均达到0.7ml/s以上,10cm以下2种林地染色区和未染色区稳定出流速率均逐渐下降。针阔混交林土体染色区出流速率是未染色区出流速率2.42∽2.84倍,而楠竹林达到3.0∽3.14倍。针阔混交林和楠竹林的大孔隙孔径范围在0.4∽3.2mm,其中半径大于1.5mm大孔隙是两种林地形成优先流的最主要孔径范围。

英文摘要：

Based on outdoor dyeing method and water breakthrough curve theory and combining with the Poi- seulle equation and flow equation, the relationships between soil macropores and the preferential flow were quantitatively researched in mixed broadleaf-conifer forest and Phyllostachys pubescens forest, Zhang Jiashan forest district, Simian Mountains, Chongqing. It showed that the water steady effluent volume in 0 to 10 cm soil layer of the two kinds of woodlands was both more than 0.7 ml/s, and that in deeper layer was both de- clining gradually. Besides, effluent volume in dye-stained areas was 2.42 --2.84 times higher than that in blank areas, while Phyllostachys pubescens forests reached 3. 043. 14 times . The radii of soil macropores ranged from 0.4 mm to 3.2 mm. The macropores with radii larger than 1.5 mm was important factors affecting the path of preferential flows.