干旱区生态环境知识资源中心(Arid): 贵州省黔西县土壤侵蚀敏感性评价

Arid

	贵州省黔西县土壤侵蚀敏感性评价
其他题名	Sensitivity evaluation of soil erosion in Qianxi county of Guizhou province
	张景华; 高慧; 欧阳渊; 张建龙
来源期刊	中国水土保持科学
ISSN	2096-2673
出版年	2018
卷号	16 期号:2 页码:88-94
中文摘要	根据黔西县碳酸盐岩分布广、纯度高和土壤侵蚀不同于非喀斯特地区的特点,选取降雨侵蚀力、坡度、土壤质地、植被类型、土壤允许流失量和基岩裸露率6个指标,在ArcGIS的支持下,开展土壤侵蚀敏感性评价,并从构造和岩性2方面分析土壤侵蚀敏感性与地质背景之间的关系。结果表明:1)黔西县土壤侵蚀以轻度中度敏感为主,占68.93%,敏感性全县整体较低、局部较高,高度极敏感主要分布于定新、铁石、沙井、锦星等乡镇,以定新乡最为敏感;2)地质背景对黔西县土壤侵蚀敏感性有着深远的影响,构造通过控制地貌形态和岩性分布间接影响土壤侵蚀敏感性,岩性直接控制着土壤侵蚀的敏感程度,岩性组合中碳酸盐岩的含量越多,土壤侵蚀越敏感,高度极敏感区绝大部分都在碳酸盐岩区。
英文摘要	[Background]Qianxi county of Guizhou province is an important ecological barrier and plays an important role in ensuring the ecological security of the Wujiang River Basin.However,as a typical mountainous county in karst region,carbonate rocks are more than 90% of the area of Qianxi county,and affected by various reasons,thus the ecological environment is fragile.In this paper,the sensitivity evaluation of soil erosion was carried out,in order to provide the basis for soil and water conservation and ecological environment construction.[Methods] The geological environment of Qianxi county is characterized by wide distribution and high purity of carbonate rocks,and karst rocky desertification.Therefore,the soil erosion in Qianxi county is different from that of non-karst areas.In addition to rainfall,topography,soil and vegetation influence,soil loss tolerance and bareness of bedrocks closely related with the geological background should also be considered.Therefore,rainfall erosion,slope gradient,soil texture,vegetation types,soil loss tolerance and bareness of bedrocks were selected as indicators to evaluate the sensitivity of soil erosion,under the support of ArcGIS.First,the single factor sensitivity evaluation of soil erosion was carried out.Second,all factors of soil erosion sensitivity were carried out by overlay analysis.And then the relationship between soil erosion sensitivity and geological background was analyzed from the structure and lithology.[Results] 1) The soil erosion in Qianxi county was mainly slight and moderate sensitive,accounting for 68.93%,and the sensitivity of soil erosion was low in the whole county,but rather high in some areas.The strongly and extremely sensitive areas were mainly distributed in Dingxin,Tieshi,Shajing,and Jinxing towns.Dingxin is the most sensitive town.2) The geological background had a profound impact on the soil erosion sensitivity of Qianxi county.The structure indirectly influenced the soil erosion sensitivity by controlling the distribution of landform and lithology.The lithology directly determined the sensitivity of soil erosion.With the content of carbonate rocks increased,the more sensitive soil erosion was.The strongly and extremely sensitive areas were mostly distributed in the carbonate rock areas.[Conclusions] Through the study,we understand that soil loss tolerance and bareness of bedrocks should be used as the important indicators to evaluate the sensitivity of soil erosion in the karst area.At the same time,this study may also provide the basis for the soil and water conservation and ecological environment construction in Qianxi county.We suggest to carrying out the comprehensive control of soil and water loss in the strongly and extremely sensitive areas of soil erosion in order to maintain the residual soil.
中文关键词	土壤侵蚀 ; 敏感性评价 ; 地质背景 ; 岩性 ; 构造
英文关键词	soil erosion evaluation of sensitivity geological background lithology structure
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:6242479
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/238840
作者单位	中国地质调查局成都地质调查中心, 成都, 四川 610081, 中国
推荐引用方式 GB/T 7714	张景华,高慧,欧阳渊,等. 贵州省黔西县土壤侵蚀敏感性评价[J],2018,16(2):88-94.
APA	张景华,高慧,欧阳渊,&张建龙.(2018).贵州省黔西县土壤侵蚀敏感性评价.中国水土保持科学,16(2),88-94.
MLA	张景华,et al."贵州省黔西县土壤侵蚀敏感性评价".中国水土保持科学 16.2(2018):88-94.