YUAN Jing,GAO Hua-duan,ZHANG Xu-xian,et al.Research on the Interlayer Joints of Bedrock in the Karst Region of Guiyang City Based on Soil Erosion[J].Research of Soil and Water Conservation,2012,19(05):167-170.
基于土壤侵蚀的贵阳市喀斯特地区基岩层间节理研究
- Title:
- Research on the Interlayer Joints of Bedrock in the Karst Region of Guiyang City Based on Soil Erosion
- Keywords:
- soil erosion; interlayer joints; Karst region; Guiyang City
- 分类号:
- S157.1
- 摘要:
- 基岩层间节理研究是探索喀斯特地区土壤侵蚀机理的前提与基础。运用ArcGIS 9.3软件对贵阳市地层资料进行分类、归并、统计，并根据层理类型划分标准，选取层间节理频度Ⅰ级、Ⅱ级、Ⅲ级、Ⅳ级、Ⅴ级为分类指标。在一定比例尺地质图的基础上，按照统计资料，对地质图进行数字化，进一步形成贵阳市层间节理频度分布图、贵阳市碳酸盐岩分布图。结果表明：贵阳市喀斯特地区白云岩面积占全市总面积的36%，石灰岩面积占全市总面积的43%；基岩层间节理频度有Ⅰ级、Ⅱ级、Ⅲ级，其中Ⅰ级占总面积的15%，Ⅱ级占总面积的20%，Ⅲ级占总面积的44%；贵阳市石灰岩地区，层间节理频度不同等级所占的面积由高到低依次为：Ⅲ级>Ⅰ级>Ⅱ级，而白云岩地区，层间节理频度不同等级所占的面积由高到低依次为：Ⅲ级>Ⅱ级>Ⅰ级；贵阳市石灰岩地区易形成高频度层间节理。
- Abstract:
- The study on bedrock interlayer joint is the premise and basis to examine the soil erosion mechanism in Karst region. ArcGIS 9.3 software was used to classify, merge, and count the stratigraphy data of Guiyang City, and according to the classification standard of the type of the interlayer joint, the interlayer joint frequency with grade Ⅰ, Ⅱ, Ⅲ, Ⅳ, Ⅴas the classification index was selected. On the basis of a certain scale geological map, the geological map was digitalized according to the statistical data, the interlayer joint frequency distribution map and the carbonate distribution map of Guiyang City were formed. The results showed that the dolomite area accounted for 36% of the total area in Guiyang Karst region, and the limestone area took up 43% of the total area in Karst region of Guiyang. The interlayer joint frequencies of bedrock were grade Ⅰ, Ⅱ, Ⅲ among which grade Ⅰ took up 15% of the total area, grade Ⅱ accounted for 20%, and grade Ⅲ accounted for 44%. In limestone area of Guiyang, the distribution area order of interlayer joint frequency of different levels from high to low was gradeⅢ>gradeⅠ>gradeⅡ;the order was gradeⅢ>gradeⅡ>grade in dolomite area. The high frequency of the interlayer joint frequency was readily formed in the limestone area of Guiyang City.
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备注/Memo
收稿日期:2012-5-29;改回日期:2012-6-29。
基金项目:国家自然科学基金“喀斯特坡耕地产流产沙特征及过程研究”(41061029)
作者简介:袁靓(1988- )，女(土家族)，贵州省思南县人，硕士研究生，主要研究方向：水土保持。E-mail：Jodie-0932@163.com
通讯作者:高华端(1965- )，男，贵州省织金县人，教授，博士，硕导，主要研究方向：区域水土保持与环境。E-mail：gdghd110@163.com