干旱区生态环境知识资源中心(Arid): 基于探地雷达解译的喀斯特坡地表层岩溶带空间分布特征研究

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	基于探地雷达解译的喀斯特坡地表层岩溶带空间分布特征研究
其他题名	STUDY ON SPATIAL DISTRIBUTION OF EPIKARST ZONE ON PLATEAU KARST SLOPE BASED ON GROUND-PENETRATING RADAR
	彭韬 1; 周长生 1; 宁茂岐 2; 付磊 2; 戴德求 3; 王世杰1
来源期刊	第四纪研究
ISSN	1001-7410
出版年	2017
卷号	37 期号:6 页码:1262-1270
中文摘要	表层岩溶带作为喀斯特关键带区别于其他区域地球关键带的近地表岩土结构标志层,对于水分和养分下渗、赋存、滞留、植被水分养分利用等方面具有重要作用,是岩石-土壤-植被系统中生物地球化学过程最为活跃的关键地带。描述和认识表层岩溶带对认知喀斯特关键带结构信息、研究水土物质循环过程、揭示表层与地下水资源利用规律等方面具有十分重要的理论和现实意义。本文利用探地雷达技术,探测黔中高原黔西县东南部喀斯特坡地,共计测线35条,测点799个,提取表层岩溶带发育厚度并分析空间分布特征,得到以下结论:喀斯特高原峰丛地貌区表层岩溶带发育较好,发育厚度集中在2~8m之间,最深可达18.8m。表层岩溶带发育空间分布异质性强,坡地表层岩溶带厚度发育异质性变化强于坝地。地面物质组成和表层岩溶带发育厚度关系密切,坡地石质化比例提高,表层岩溶带发育较深,地面物质组成可作为高原型喀斯特坡地反映表层岩溶带发育程度的综合代用性指标。本次研究还指示了喀斯特坡地土地石质化是表层岩溶带地质历史时期不断溶蚀发育演化、土壤地质历史持续漏失的结果。表层岩溶带的发育为水土漏失提供了空间基础,水土漏失也进一步加剧了岩土界面的水岩反应过程,促进了表层岩溶带的进一步发育以及地表土体下沉、基岩裸露、土地石质化景观的出现。
英文摘要	Epikarst, as a mark layer of geotechnical structure of karst critical zone different from other critical zones, plays an important role in water and nutrient infiltration, reserves, retention and also vegetation water nutrient utilization. Epikarst is the most critical zone of the biogeochemical process in rock-soil-vegetation system. Describing and understanding epikarst zone have very important theoretical and practical significance on the researches of the karst critical zone structure information, water and soil cycling and surface and groundwater resources utilization. Using the ground-penetrating radar (GPR) technology detect the thickness of epikarst zone on karst slope at karst plateau Houchang Village, Qianxi County, Guizhou Province. 35 GPR profiles within three types (main soil, soil mix rock and main rock) of different Ground material composition (Bedrock exposure proportion) and 799 GPS points were analyzed,and the results show that: the epikarst developed very well in the karst plateau peak cluster depression area, the average thickness below ground is about 2-8 meters, and the deepest can reach 18.8 meters. The spatial distribution of epikarst has high heterogeneity,and the variation of epikarst heterogeneity decreased from top to the toe of mountain. Ground material composition (bedrock exposure proportion) has close relation to the thickness of epikarst development. With sloping bedrock explosion proportion increasing,the epikarst thickness also increased. That means the ground material composition can be used as the a comprehensive index which can reflecting the epikarst development degree on karst slope area. In addition, this study also indicates that the strong relationship between epikarst development and karst rocky desertification. As the epikarst zone development on slope, epikarst zone can provide more space for soil and water leakage; on the other hand,the soil and water easily leak through fissure and grikes to the underground can enhance the bedrock dissolution and enlarge the epikarst. As this progress cycling at geological time,more bedrock expose to the slope surface and the rocky lithology landscape appeared.
中文关键词	喀斯特 ; 石漠化 ; 表层岩溶带 ; 关键带 ; 探地雷达
英文关键词	karst rocky desertification epikarst critical zone Ground -penetrating Radar
语种	中文
国家	中国
收录类别	CSCD
WOS类目	MINERALOGY
WOS研究方向	Mineralogy
CSCD记录号	CSCD:6106440
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/235845
作者单位	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, 贵阳, 贵州 550081, 中国; 2.贵州省水土保持技术咨询研究中心, 贵阳, 贵州 550021, 中国; 3.湖南科技大学资源环境与安全工程学院, 湘潭, 湖南 411100, 中国
推荐引用方式 GB/T 7714	彭韬,周长生,宁茂岐,等. 基于探地雷达解译的喀斯特坡地表层岩溶带空间分布特征研究[J],2017,37(6):1262-1270.
APA	彭韬,周长生,宁茂岐,付磊,戴德求,&王世杰.(2017).基于探地雷达解译的喀斯特坡地表层岩溶带空间分布特征研究.第四纪研究,37(6),1262-1270.
MLA	彭韬,et al."基于探地雷达解译的喀斯特坡地表层岩溶带空间分布特征研究".第四纪研究 37.6(2017):1262-1270.