干旱区生态环境知识资源中心(Arid): 基于遥感指数的干旱内陆河流域土地生态敏感性时空演变特征以石羊河流域武威市为例

Arid

	基于遥感指数的干旱内陆河流域土地生态敏感性时空演变特征以石羊河流域武威市为例
其他题名	Spatiotemporal evolution of land ecological sensitivity in arid inland river basin based on remote sensing index: A case of Wuwei City in Shiyang River Basin
	魏伟; 周陶; 郭泽呈; 李振亚; 张学渊
来源期刊	生态学杂志
ISSN	1000-4890
出版年	2020
卷号	39 期号:9 页码:3068-3079
中文摘要	为评价石羊河流域治理工程实施的成效,本文选用流域重点区域武威市作为研究区,在综合考虑武威市土地实际状况的基础上,利用遥感数据,借助GIS和RS技术,选取土壤侵蚀、土壤荒漠化、土壤含水量和土壤盐渍化4个指数,构建武威市土地生态敏感性评价体系,运用主成分分析法综合各指数,得到1995、2000、2005、2010、2015和2018年的土地生态敏感性空间分布数据,并对其时空演变规律进行了探讨。结果表明: (1)武威市土地生态敏感性整体呈现西南低、东北高、渐进式的分布格局,随时间推移,部分中、强度敏感性土地转变为轻、微度敏感性土地,总体上敏感性有所降低; (2)武威市50%以上的土地其敏感性变化频次处于较低水平,未发生大规模的高频转化现象,不同地物类型之间频次差异明显,而内部分布相对集中; (3)武威市90%以上的土地变化趋势为稳定不变或波动变化模式,局部地区为波动下降或波动上升模式,整体而言土地恢复面积大于退化面积,土地生态环境趋于良好; (4)武威市土地生态敏感性波动范围在0 ~ 1.8,处于不稳定状态,经历了19952005年先恶化、20052018年逐步恢复的过程,表明石羊河流域治理工程实施后,生态环境得到改善,生态治理效果较显著。
英文摘要	We evaluated the effectiveness of the Shiyang River Basin governance project,with Wuwei,a key area of the river basin,as the research area. Based on the remote sensing data and analysis of GIS,with four indices including soil erosion,soil desertification,soil water content and soil salinization,the evaluation system of land ecological sensitivity in Wuwei was established. With the principal component analysis,we analyzed spatial distribution of land ecological sensitivity in 1995,2000,2005,2010,2015 and 2018 and the temporal and spatial evolution patterns. Results showed that: (1) land ecological sensitivity was generally lower in the southwest and higher in the northeast,with a gradual distribution pattern. Some moderately/intensively sensitive land had been transformed into mildly/slightly sensitive land,resulting in a reduction of the overall sensitivity. (2) Over 50% of the land had a relatively low frequency of sensitivity changes,without large-scale high-frequency conversion. The frequency of different land types varied significantly,while the internal distribution was relatively concentrated. (3) More than 90% of land ecological sensitivity change was stable or fluctuating,and in some areas,the pattern was in fluctuating declining or rising. Overall,the restored land area was larger than the degraded area and the land ecological environment was tending good. (4) The fluctuation range of land ecological sensitivity was from 0 to 1.8,which was unstable. A deteriorating process was recorded from 1995 to 2005 and gradually recovering process from 2005 to 2018,indicating that ecological environment in the Shiyang River Basin had been improved and that the outputs of ecological management were remarkable.
中文关键词	土地生态敏感性 ; 时空演变 ; 遥感指数 ; 武威市
英文关键词	GIS land ecological sensitivity spatiotemporal evolution remote sensing indexes GIS Wuwei City
类型	Article
语种	中文
收录类别	CSCD
WOS研究方向	Agriculture
CSCD记录号	CSCD:6800402
来源机构	西北师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336878
作者单位	魏伟, 西北师范大学地理与环境科学学院, 兰州, 甘肃 730070, 中国.; 周陶, 西北师范大学地理与环境科学学院, 兰州, 甘肃 730070, 中国.; 郭泽呈, 西北师范大学地理与环境科学学院, 兰州, 甘肃 730070, 中国.; 李振亚, 西北师范大学地理与环境科学学院, 兰州, 甘肃 730070, 中国.; 张学渊, 西北师范大学地理与环境科学学院, 兰州, 甘肃 730070, 中国.
推荐引用方式 GB/T 7714	魏伟,周陶,郭泽呈,等. 基于遥感指数的干旱内陆河流域土地生态敏感性时空演变特征以石羊河流域武威市为例[J]. 西北师范大学,2020,39(9):3068-3079.
APA	魏伟,周陶,郭泽呈,李振亚,&张学渊.(2020).基于遥感指数的干旱内陆河流域土地生态敏感性时空演变特征以石羊河流域武威市为例.生态学杂志,39(9),3068-3079.
MLA	魏伟,et al."基于遥感指数的干旱内陆河流域土地生态敏感性时空演变特征以石羊河流域武威市为例".生态学杂志 39.9(2020):3068-3079.