水土保持学报2012，Vol.26Issue(2)：80-84,5.
三峡库区森林土壤优先流染色特征
Dyeing Characteristic of Preferential Flow Under Forestland in the Three Gorges Reservoir Area
摘要
Abstract
Preferential flow plays an important role in water conservation and runoff regulation under forestland,studying the characteristics of preferential flow in forest soil is important to analyze the characteristics of soil infiltration and the mechanistic of hydrological process of forestland.In order to analyze the dyeing characteristics of different forest soils on mountain,the dyeing test on different vertical zones in the Three Georges reservoir area was carried out through dye trace method.The results indicated that significant differences were found for the dye coverage of surface soils（0-10 cm） among different forest soils,the dye depth and the vertical change of dyeing characteristics were different under different forest soils too.The dye coverage of surface soils covered with mixed evergreen and deciduous broad-leaved forest in Mid-mountainous zone was the highest,but the depth of dye was the shallowest,and the dye coverage of forest soils were decreased with the increasing of soil depth.For different experiment sites covered with evergreen coniferous forest in Mid-mountainous zone,the dye coverage of surface soils and depth of dye were different,and the vertical changes of dye coverage were more divergent between two experiment sites.The dye coverage of surface soils covered with evergreen coniferous forest in Low-mountainous zone was the lowest while its dye depth was the deepest,and the vertical changes were undulate.The difference of dyeing characteristics between various forest soils were mainly caused by different amount of preferential flow and its distribution,while the formation of preferential flow were influenced by root system,cracks and physical characteristics of forest soils.关键词
森林土壤/优先流/染色示踪/三峡库区Key words
forest soil/preferential flow/dye trace/Three Gorges reservoir area分类
农业科技引用本文复制引用
张财宝,刘目兴,王文德,张海林,黄建武,杜文正..三峡库区森林土壤优先流染色特征[J].水土保持学报,2012,26(2):80-84,5.基金项目
国家自然科学基金项目 （）
湖北省自然科学基金项目 （）
武汉市“晨光”计划项目 （）
