干旱区生态环境知识资源中心(Arid): 地质地貌因素对喀斯特石漠化的影响以广西大化县例

Arid

	地质地貌因素对喀斯特石漠化的影响以广西大化县例
其他题名	Effects of Geology and Landform on Karst Rock Desertification: A Case Study in Dahua County of Guangxi, China
	杨青青; 王克林; 陈洪松; 张伟; 田日昌
ISSN	1008-2786
出版年	2009
卷号	27 期号:3 页码:311-318
中文摘要	运用广西大化县的DEM、石漠化、地质数据,通过GIS叠加分析,探讨了地质地貌因素对石漠化分布的影响.结果表明:地貌区的石漠化发生率排序为高峰丛洼地区>中峰从洼地区>峰林谷地区>丘陵山地区.发生石漠化的4种碳酸盐岩中,发生率排序为连续性灰岩>灰岩夹碎屑岩>灰岩与白云岩混合组合>灰岩与碎屑岩互层组合.碳酸盐岩含量较高的3种岩性在25°～45°坡地石漠化发生率最高,含量较低的岩性石漠化发生率高峰在35°～60°,同时发现所有岩性的石漠化发生率在3°～ 8°坡度区间存在小高峰,这与坡脚普遍的顺坡耕种有关.断层与石漠化关系密切,中度以上石漠化集中分布在断层周围1.5 km内.石漠化的发生是人为干扰、坡面侵蚀、岩石成土与溶蚀作用等综合作用的结果.在石漠化的防治中,应该综合考虑地貌发育、坡度、岩石碳酸盐含量、断层分布等多个因子的影响.
英文摘要	We used GIS technique to overlay the DEM, rock desertification data and geology data of Dahua county of Guangxi Region to explore the influence of geology and landform factors on rock desertification. The results showed: the occurrence of rock desertification of different landform zones was in order of high cluster-peak depres-sion zone > moderate cluster-peak depression zone > peak-cluster vally zone > Hilly zone; the occurrence of rock desertification of different lithology was in order of continuous limestone > clastic rock inclusion in limestone > lime-stone and dolomite association > limestone layered with clastic rock. The occurrence of rock desertification of three lithology with higher carbonatite content was the highest in 25?45?slope, The occurrence of rock desertification of lithology with lower carbonatite content was the highest in 35?60?slope. Meanwhile there were all higher value between 3?8?slope, it was the result of general longitudinal cultivation at foot-slope. There was a close relation-ship between rock desertification and fault, moderate and intense rock desertification mainly scattered along the faults within 1.5 km. Rock desertification was comprehensive results of human disturbance, slope erosion, weathe-ring pedogenesis by carbonate rock and karstification. We should considerate the landform class, slope degree, car-bonate content of rocks, fault distribution and other factors when we prevent rock desertification and actualize eco-logic reconstruction.
中文关键词	石漠化 ; 地质 ; 坡度 ; 岩性 ; 断层 ; 喀斯特
英文关键词	GIS rock desertification geology GIS slope lithology fault karst
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOSCIENCES MULTIDISCIPLINARY ; ENVIRONMENTAL SCIENCES
WOS研究方向	Geology ; Environmental Sciences & Ecology
CSCD记录号	CSCD:3753923
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/223998
作者单位	中国科学院亚热带农业生态研究所, 长沙, 湖南 410125, 中国
推荐引用方式 GB/T 7714	杨青青,王克林,陈洪松,等. 地质地貌因素对喀斯特石漠化的影响以广西大化县例[J],2009,27(3):311-318.
APA	杨青青,王克林,陈洪松,张伟,&田日昌.(2009).地质地貌因素对喀斯特石漠化的影响以广西大化县例.,27(3),311-318.
MLA	杨青青,et al."地质地貌因素对喀斯特石漠化的影响以广西大化县例".27.3(2009):311-318.