摘要
崩岗是我国南方红壤区的一种重要的侵蚀类型,在江西赣南风化花岗岩山地丘陵区发育得相当普遍.根据崩岗形成特点,可将其发育过程划分成四个阶段,即网状细沟阶段、阶梯沟阶段、深沟阶段和崩岗扩展阶段.崩岗的形成和发展受多方面因素的影响;深厚松散的花岗岩风化物是崩岗的物质基础;暴雨径流和土体自重是崩岗发育的主要动力;地质作用和岩体节理结构可引起抗蚀力的减低;地表植被遭受严重破坏成为崩岗的必要前提.
In the red earth area in southern China,the collapse is an important patternwhich is widespread in weathered granite area in southern Jiangxi Province.According to its forming characteristics,the development process of thecollapse can be divided into 4 stages:netted-rill stage;stepped-rill stage;deep-gully stage and collapse-expansion stage.The formation and development ofthe collapse were affected by many factors:The deep,thick and loose weatheredproduct of granite is the material basis of the collapse;The storm runoff andthe soil weight are the main forces;The geologic function and rock jointscan cause the decrease of erosion durability;The heavily damaged vegetationover the surface soil is the essential prerequisite of the collapse.
出处
《江西农业大学学报》
CAS
CSCD
1990年第1期29-36,共8页
Acta Agriculturae Universitatis Jiangxiensis
关键词
崩岗
侵蚀
土壤
抗蚀性
风化花岗岩
The collapse
Gully
Erosion durability of soil
Weathered granite
Parent material
