干旱区生态环境知识资源中心(Arid): 基于改进沙丘活动指数的晋北地区土地沙化风险动态分析

Arid

	基于改进沙丘活动指数的晋北地区土地沙化风险动态分析
其他题名	Analysis on the dynamics of desertification risk based on improved dune mobility index in north Shanxi Province
	王云霞 1; 张红 2
来源期刊	干旱区资源与环境
ISSN	1003-7578
出版年	2019
卷号	33 期号:5 页码:95-100
中文摘要	土地沙化是全球主要环境问题之一,晋北地区由于地处北方干旱半干旱区,土地沙化是该区经济发展的制约因素之一。文中在传统的沙丘活动指数的基础上,结合地表环境特征对其进行了改进,探讨了基于改进的沙丘活动指数的2001-2012年来晋北地区土地沙化风险的时空分布和变化特征。结果如下: 1)改进的沙丘活动指数将气候因子、植被因子和土壤因子纳入考虑。基于改进的沙丘活动指数分析,2001-2012年晋北主要以未沙化风险为主,轻度沙化风险居中,中度沙化风险和重度沙化风险较少。中度以上沙化风险主要集中在西南部的保德县和东北部的南郊区、阳高县和天镇县部分区域。2) 2001-2012年间,晋北沙化土地风险呈现一个持续逆转的态势;呈明显逆转和逆转的沙化土地风险主要集中在晋西北和左云县、怀仁县、大同县、阳高县等地,呈发展和严重发展的沙化土地风险则主要集中分布在大同的南郊区和天镇县。研究区重度沙化风险的区域面积在逐渐降低;轻度、中度沙化风险的土地面积在减少,未沙化风险的区域面积在逐渐增加; 3)文中探讨了基于改进的活动沙丘指数的晋北地区土地沙化风险,研究发现该指数在一定程度上能反映整个晋北地区的土地沙化风险特征。但是,该指数也存在一定的不足,人类活动(如国家退耕还林政策)对土地沙化风险会产生一定的影响,未来需要进一步验证指数的合理性。
英文摘要	Desertification is a major environmental problem concerned by all world. Northern Shanxi is located in the east of loess plateau and the temperate semi-arid steppe zone,where the desertification caused by wind erosion is seriously. This research improved dune mobility index introduced by Lancaster,and put forward desertification risk index combined dune mobility index,NDVI and soil erodible K together. The spatial distribution,area and dynamic change of desertification risk of Northern Shanxi were explored based on the desertification risk index. The results indicated: 1) Based on the improved dune mobility index,northern Shanxi province was mainly no desertification risk. The moderate and severe desertification risk could be found in Baode County, Nanjiao District,Yanggao County and Tianzhen Counth. 2) Combining the climate factors and land surface environmental factors together,the desertification risk of research area from 2001 to 2012 exhibited a sustained reversal trend. The obvious reversaland reversalwere mainly concentrated in the northwest of Shanxi and Zuoyun,Huairen,Datong and Yanggao County. Thedevelopmentandserious developmentwere mainly concentrated in the Datong Nanjiao District and Tianzhen County. 3) The improved dune mobility index revealed the relationship between climates,land surface environment and desertification risk. However,human activities such as afforestation also impacted the desertification risk. The rationality of improved dune mobility index should be validated in future.
中文关键词	土地沙化 ; 沙丘活动指数 ; 沙化指数 ; 时空格局 ; 晋北地区
英文关键词	desertification risk dune mobility index desertification index temporal-spatial pattern north Shanxi Province
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOSCIENCES MULTIDISCIPLINARY
WOS研究方向	Geology
CSCD记录号	CSCD:6485121
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/239199
作者单位	1.山西省林业调查规划院, 太原, 山西 030012, 中国; 2.山西大学环境与资源学院, 太原, 山西 030006, 中国
推荐引用方式 GB/T 7714	王云霞,张红. 基于改进沙丘活动指数的晋北地区土地沙化风险动态分析[J],2019,33(5):95-100.
APA	王云霞,&张红.(2019).基于改进沙丘活动指数的晋北地区土地沙化风险动态分析.干旱区资源与环境,33(5),95-100.
MLA	王云霞,et al."基于改进沙丘活动指数的晋北地区土地沙化风险动态分析".干旱区资源与环境 33.5(2019):95-100.