摘要
喀斯特地区土壤侵蚀问题备受关注,为定量分析不同岩性区土壤侵蚀的空间分异状况,以贵州省黔中地区为例,运用GIS的空间分析功能对土壤侵蚀量和岩性进行叠加,探讨各类岩性下土壤侵蚀和土壤侵蚀等级之间的相关关系。研究结果表明:(1)可溶性岩类是土壤侵蚀发生的主要岩性基底,各岩性组合平均土壤侵蚀模数表现为灰岩地区,高于白云岩地区,高于碳酸盐岩地区高于非可溶性岩地区。(2)土壤侵蚀主要发生在灰岩与碎屑岩互层、非可溶性岩、灰岩与白云岩互层和白云岩中,灰岩和白云岩地区的土壤侵蚀分布广,侵蚀程度高。(3)白云岩类土壤侵蚀发生率高,侵蚀程度相对较低;灰岩和碳酸盐岩类发生率较低,侵蚀程度高;非可溶性岩发生率低,侵蚀程度低。该研究结果为建立不同岩性区科学的水土流失和水土保持监测机制提供了新的思路,可为喀斯特地区土壤侵蚀治理和社会可持续发展提供参考。
The occurrence of soil erosion in Karst areas of China have attracted much attention.In order to quantitatively analyze the relationship between different lithologic and soil erosion,spatial analysis of map of soil erosion quantity and lithology is conducted by GIS,and the correlation between soil erosion and soil erosion grade under various lithology is investigated by taking central Guizhou as an example.The results are as follows.(1)Carbonate rocks are the main lithological basement where soil erosion occurs.The order of average soil erosion modulus of each lithological combination is limestone area,dolomite area,carbonate rock area,non-soluble rock area.(2)Soil erosion mainly occurs in limestone clastic rock combination,non-soluble rock,limestone and dolomite rock combination and dolomite rock.Among them,soil erosion in limestone and dolomite areas is widely distributed and has a high degree of erosion.(3)Dolomite has a high incidence of soil erosion and a relatively low degree of erosion.Limestone and carbonate rocks have a low incidence,high degree of erosion.Low incidence of insoluble rock occurs rarely with a low degree of erosion.The results provide a new idea for the establishment of scientific soil erosion and soil conservation monitoring mechanism in different lithologic areas,and can provide a reference for soil erosion control and social sustainable development in Karst areas.
作者
谢波
杨广斌
杨情琴
李亦秋
方启彬
XIE Bo;YANG Guang-bin;YANG Qing-qin;LI Yi-qiu;FANG Qi-bin(School of Geography and Environmental Sciences,Guizhou Normal University,Guiyang 550025,China;Guizhou Provincial Key Laboratory of Mountain Resources and Environment Remote Sensing Application,Guiyang 550025,China;Natural Resources Bureau of Shuicheng District,Liupanshui City,Liupanshui 553600,China;Guizhou Monitoring Station of Soil and Water Conservation,Guiyang 550002,China)
出处
《湖南师范大学自然科学学报》
CAS
北大核心
2023年第5期10-16,共7页
Journal of Natural Science of Hunan Normal University
基金
贵州省重大专项资助项目(黔科合重大专项[2022]001)
贵州省水利厅科技专项经费资助项目(KT201825)
贵州省科技计划资助项目(黔科合支撑[2023]一般176)。
关键词
黔中地区
喀斯特
岩性
土壤侵蚀
空间分异
叠置分析
central Guizhou
Karst
lithology
soil erosion
spatial differentiation
overlay analysis
