贵州碳酸盐岩岩性基底对土地石漠化时空演变的控制
Constrains of Lithological Background of Carbonate Rock on Spatio-temporal Evolution of Karst Rocky Desertification Land
查看参考文献17篇
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文摘
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为了解碳酸盐岩岩性基底对土地石漠化时空演变的作用，利用RS、GIS和GPS技术构建了贵州20世纪80年代、90年代和21世纪初3期1：10万的土地石漠化历史空间分布图，结合碳酸盐岩岩石组合类型分布数据，利用数学建模的方法进行空间分析．结果发现：(1)石漠化的演变方式与碳酸盐岩的类型有关，而与其纯度关系不大；(2)石漠化演变规模、演变速率和演变频率与碳酸盐岩岩性纯度呈正相关；(3)在石灰岩组合类型区，无石漠化土地易演变到中度石漠化土地；而在白云岩组合类型区，无石漠化土地易演变到轻度石漠化土地；(4)无论碳酸盐岩纯度和组成如何，在石漠化演变的长期过程中，强度以上石漠化波动较小，轻度、中度石漠化波动较大．因此，碳酸盐岩岩性基底对土地石漠化的时空演变过程有明显的控制作用． |
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其他语种文摘
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In order to study the effect of lithological background of carbonate rock on spatio-temporal evolution of karst rocky desertification (RD) land, 1 : 100 000 scale digital RD distribution maps of Guizhou in 1986, 1995 and 2000 were obtained by RS, GIS and GPS (3S) technology and user-computer interactive interpreting method from Landsat remote sensing images. On the basis of spatial analysis and statistics, in association with digital-distribution map of carbonate rock assemblages' type, the following findings were obtained: (1) The evolution mode of RD land is related to carbonate rock types and is obviously uncorrelated with its purity. (2) Significant positive correlation was observed between evolution scale, evolution speed, evolution frequency and carbonate rock purity. (3) No RD land evolves easily to moderate RD in limestone rock combination type area, yet it evolves easily to light RD in dolomite combination type area. (4) Whatever the purity and component of the carbonate rocks are, the variation of the strong RD and extremely strong RD is not significant in the long-term evolution process, whereas the variation of the light RD and moderate RD is remarkable. In conclusion, the evolution process of RD land is constrained obviously by lithological background of carbonate rock. |
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来源
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地球科学
,2010,35(4):691-696 【核心库】
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DOI
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10.3799/dqkx.2010.084
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关键词
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碳酸盐岩
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岩性
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土地石漠化
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时空演变
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空间分析
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地址
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1.
中国科学院地球化学研究所, 环境地球化学国家重点实验室, 贵州, 贵阳, 550002
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贵州师范大学中国南方喀斯特研究院, 贵州, 贵阳, 550001
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-2383 |
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学科
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地质学;自然地理学 |
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基金
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国家973计划
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中国科学院知识创新工程重要方向项目
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国家科技支撑计划重大项目
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文献收藏号
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CSCD:3898200
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