干旱区生态环境知识资源中心(Arid): 西北诸河流域土地利用变化及土地生态安全评估

Arid

	西北诸河流域土地利用变化及土地生态安全评估
其他题名	Land use change and land ecological security assessment in the river basins of northwestern China
	吴景全; 吴铭婉; 臧传富
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2021
卷号	44 期号:5 页码:1471-1482
中文摘要	运用ArcGIS空间分析,揭示了1990-2018年西北诸河流域土地利用动态变化特征,采用压力-状态-响应(Pressure-state-response,P-S-R)模型和熵权法对指标进行赋权,并分析了西北诸河流域土地生态安全状况。结果表明:(1)西北诸河流域2015-2018年综合土地利用动态度为2.65%,土地利用变化剧烈。2000年后城乡建设用地年平均单一动态度为4.16%,增长速度最快。草地主要向沙地、耕地和其他未利用土地转出,流域荒漠区沙地和其他未利用土地之间转换稳定。(2)西北诸河流域土地生态安全评价指标体系中状态层权重最高,为0.4985,由指标权重排序可知,经济社会发展、湿地面积和人口增长是影响西北诸河流域土地生态安全评价的重要因素。 (3)1990-2018年西北诸河流域土地生态安全指数呈递增趋势,1990-2014年基本处于不安全级,2015年后转变为较不安全级,西北诸河流域土地生态安全状况有所好转。本研究为西北诸河流域土地利用管理规划提供科学依据,为自然流域尺度的土地利用变化及土地生态安全性研究提供实例。
英文摘要	Land is the most basic natural resource and is the material basis for human survival and development; change in land use/cover, as an important factor affecting global environmental change, is the most direct reflection of human activities. In the context of China's rapid economic and social development, there is a competition between protecting the ecologically fragile nature of land and the huge demand for urban land development. A lack of attention to maintaining ecological land use and the irrational use of land resources are two factors that have exacerbated land ecological disorders. Therefore, exploring the dynamics of land use change and studying the state of regional land ecological security have become important research elements for regional sustainable development. The dynamic changes in land use and land ecological security have attracted widespread attention. This study uses the ArcGIS spatial analysis software to reveal the characteristics of dynamic land use change in the river basins of northwestern China from 1990 to 2018 and uses the pressure-stateresponse model and the entropy weighting method to assign weights to indicators and analyze the status of land ecological security in the river basins of northwestern China. The results of the study show that (1) the comprehensive land use change of the river basins of northwestern China from 2015 to 2018 is 2.65%, showing a drastic change in land use. The most rapid growth in a single annual average is observed in urban and rural construction land after 2000 with a change of 4.16%. Grassland is mainly replaced by sand, cropland, and other unused land, and the conversion between sand and other unused land in the desert areas of the basin is stable. (2) The highest weight of the state layer in the evaluation index system of land ecological security in the river basins of northwestern China is 0.4985. From the ranking of index weights, it can be seen that economic and social development, wetland area, and population growth are important factors affecting the evaluation of land ecological security of the river basins of northwestern China. (3) The land ecological safety index of the river basins of northwestern China showed an increase from 1990 to 2018, remained relatively constant at an unsafe level from 1990 to 2014, and decreased after 2015; the land ecological safety of the river basins of northwestern China has improved. The problem of land desertification is an important limiting factor to the healthy development of land ecosystems in the basin. In the process of improving land ecological security, more importance needs to be placed on the conversion of desert land to ecological land, and attention needs to be paid to the construction and maintenance of ecological land. This study investigates the dynamic changes in land use and land ecological security in the river basins of northwestern China, with the aim of providing a scientific basis for land use planning and management in the river basins of northwestern China. Furthermore, this work provides examples of land use changes and land ecological security studies at the natural watershed scale.
中文关键词	西北诸河 ; 土地利用动态变化 ; 压力-状态-响应(P-S-R)模型 ; 综合评价法 ; 土地生态安全
英文关键词	the river basins of northwestern China dynamic changes of land use pressure-state-response (P-SR) model comprehensive evaluation method land ecological security
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Environmental Sciences & Ecology
CSCD记录号	CSCD:7061826
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/377644
作者单位	吴景全, 华南师范大学地理科学学院, 广州, 广东 510631, 中国.; 吴铭婉, 华南师范大学地理科学学院, 广州, 广东 510631, 中国.; 臧传富, 华南师范大学地理科学学院, 广州, 广东 510631, 中国.
推荐引用方式 GB/T 7714	吴景全,吴铭婉,臧传富. 西北诸河流域土地利用变化及土地生态安全评估[J],2021,44(5):1471-1482.
APA	吴景全,吴铭婉,&臧传富.(2021).西北诸河流域土地利用变化及土地生态安全评估.干旱区地理,44(5),1471-1482.
MLA	吴景全,et al."西北诸河流域土地利用变化及土地生态安全评估".干旱区地理 44.5(2021):1471-1482.