论文部分内容阅读
喀斯特地区的水文地质条件是生态环境保护和水土保持的物质基础。笔者等针对贵州典型喀斯特地区的第四系覆盖层进行相关水文地质研究,在普定陈旗堡村南的山坳坡地上,选择典型地质剖面,通过现场水文地质试验、室内渗透试验、物理性质试验以及矿物成分分析,测定土体的物理性质、矿物成分和渗透性,研究了喀斯特地区表层土体粘土矿物的环境指示意义。研究结果表明,喀斯特地区土体渗透系数受土体结构、粒度成分、矿物成分以及植物根系影响。同时土体中的蒙脱石遇水膨胀减弱了粘性土的粘聚力,并导致土粒易被冲蚀,不利于水土的保持,这也说明生态植被的保护和恢复对于水土保持非常重要。
The hydrogeological conditions in the karst area are the material basis for ecological environment protection and water and soil conservation. Based on the relevant hydrogeology of the Quaternary overburden in the typical karst area of Guizhou Province, the author selected typical geological sections on the slope of the south slope of Chenqianbao Village in Puding County. Through the on-site hydrogeological test, indoor penetration test and physical property test And the analysis of mineral composition. The physical properties, mineral composition and permeability of the soil were measured. The environmental significance of the clay minerals in the topsoil of karst area was also studied. The results show that the permeability coefficient of soil in karst area is affected by soil structure, grain size, mineral composition and plant roots. At the same time, swelling of montmorillonite in water reduces the cohesion of cohesive soil and leads to easy erosion of soil particles, which is not conducive to soil and water conservation. It also shows that the protection and restoration of ecological vegetation are very important for soil and water conservation.