干旱区生态环境知识资源中心(Arid): 快速城市化时期中国城市建成区植被状况的时空分异特征

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	快速城市化时期中国城市建成区植被状况的时空分异特征
其他题名	Spatial-temporal Difference of Vegetation Changes in Built-up Areas in China during the Period of Rapid Urbanization
	刘沁萍 1; 杨永春 2; 田洪阵 3; 顾磊 3; 张博 3
来源期刊	自然资源学报
ISSN	1000-3037
出版年	2014
卷号	29 期号:2 页码:223-236
中文摘要	基于植被变化视角，以中国656个建制城市的建成区为研究对象，选择1992、2000和2010年DMSP/OLS夜间灯光数据和植被数据，选用城市建成区内归一化植被指数（Normalized Difference Vegetation Index,NDVI）的均值反映建成区植被的状况；用建成区内NDVI均值和背景区内NDVI均值的比值（NDVI比值）衡量人为因素对城市建成区植被的影响情况。结果表明：①同一年份，城市规模越大，建成区植被越差；近20a来，除小城市植被变差外，其他等级城市植被总体在变好。②同一年份，规模小的城市人为因素产生的不利影响相对较小。近20a来，人为因素对特大城市和大城市植被产生的不利影响在减小，而中等城市基本不变，小城市则变大。③同一年份，从湿润半湿润森林带、半干旱草原带到干旱荒漠带的城市建成区内的植被逐渐变差；近20a来，干旱荒漠带的建成区植被状况略微变差，其余植被带内建成区植被变好。④同一年份，从湿润半湿润森林带、半干旱草原带到干旱荒漠带人为因素对建成区植被的不利影响逐渐减小；近20a来，湿润半湿润森林带内人为因素对建成区植被的不利影响在减小，而其他植被带内，人为因素的不利影响在增加。
英文摘要	Since the 1978 reform and opening up of China, the level of urbanization has increased rapidly. Rapid urban expansion and restructuring have had significant impacts on the ecological environment especially within built-up areas. This study used ArcGIS 10, ENVI 4.5, Visual FoxPro 6.0, and Python software to analyze vegetation changes, and the impact of human factors on vegetation in the built-up areas of 656 Chinese cities from 1992 to 2010. The data mainly include DMSP/OLS nighttime light data and vegetation data. Firstly, an existing algorithm for extracting urban areas based on statistical data was refined to extract the boundaries of built-up areas. Secondly, we selected the mean Normalized Difference Vegetation Index (NDVI) of a built-up area to represent absolute vegetation, and mean NDVI can reflect vegetation cover and vegetation biomass in the built-up area. We constructed a mathematical model (ratio of mean NDVI in a built-up area to a background region, RMNDVI) to measure the impact of human factors on vegetation. RMNDVI values greater than 1 indicate relatively beneficial effects, and RMNDVI values less than 1 indicate proportionally adverse effects. The results clearly indicated three aspects of vegetation changes and human influence in built-up areas during rapid urbanization: the size of cities(metropolises, large cities, medium-sized cities, and small cities), administrative divisions of China (provinces, autonomous regions, and municipalities) and vegetation zones (humid and semi-humid forest zone, semi-arid steppe zone, and arid desert zone). Finally, we discussed the mechanism of human factors on vegetation changes in built-up areas. The findings provide a scientific basis for municipal planning departments and a decision-making reference for government, and also provide scientific guidance for sustainable development in China.
中文关键词	植被变化 ; 灯光数据 ; 建成区
英文关键词	NDVI vegetation change NDVI nighttime light data built-up areas
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:5058834
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/232321
作者单位	1.天津工业大学管理学院, 天津 300387, 中国; 2.兰州大学资源环境学院, 西部环境教育部重点实验室, 兰州, 甘肃 730000, 中国; 3.兰州大学资源环境学院, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	刘沁萍,杨永春,田洪阵,等. 快速城市化时期中国城市建成区植被状况的时空分异特征[J]. 兰州大学,2014,29(2):223-236.
APA	刘沁萍,杨永春,田洪阵,顾磊,&张博.(2014).快速城市化时期中国城市建成区植被状况的时空分异特征.自然资源学报,29(2),223-236.
MLA	刘沁萍,et al."快速城市化时期中国城市建成区植被状况的时空分异特征".自然资源学报 29.2(2014):223-236.