摘要
本文给出了碳酸盐岩风化壳中土壤蠕滑的证据,阐明了土壤蠕滑等块体运动在喀斯特风化壳形成演化中的机制,并用以解释喀斯特风化壳岩土界面的突变接触,和土下基岩表面光滑的现象;提出了岩溶坡地的土壤侵蚀是化学溶蚀、重力侵蚀和流水侵蚀叠加的观点,分析了岩溶坡地土壤地下漏失和土地石质化的过程;最后讨论了植被破坏和土地垦殖等人类活动,破坏植物根系的网固作用,增加径流入渗,促进地下管道侵蚀及其上覆土壤的沉陷补给,加剧了纯碳酸盐岩坡地土壤地下漏失和土地石质化。
Evidence of soil creeping occurring in weathering crusts of carbonate rocks is developed, and functions of soil creeping in the formarion and evolution of the weathering crusts are described in this paper. The soil creeping mechanism is used to interpret the abrupt Earth-rock contact at the interfaces and the smoothness of the bedrock surfaces underneath the crust. Soil erosion on karst slopes is in tegrated of chemical dissolution, gravitational erosion and water erosion, and land lithfication caused by underground soil loss is illustra ted. Finally, the paper deals with the impacts of human activities, such as deforestation and land reclamation, on underground soil losses and land lithfication of karst slopes underlain by pure carbonate rocks, because of damage of plant root nets, increase of runoff infiltration and promotion of underground pipe erosion and sinking of the overlying crust soils.
出处
《地球与环境》
CAS
CSCD
北大核心
2007年第3期202-206,共5页
Earth and Environment
基金
中国科学院知识创新工程项目(kzcx2-yw-306-1
KZCX3-SW-448)
国家"973"项目(2006CB403203
2007CB407206)
作者简介
张信宝（1946-），男，研究员，博士生导师，主要从事土壤侵蚀与水土保持研究。
