Abstract: China is promoting the compilation of territorial spatial planning comprehensively. The construction land expansion characteristics in Guangzhou and influencing factors over a long period were investigated, which can act as a reference for the optimization of construction spatial patterns during the compilation of territorial spatial planning in the Pearl River Delta and other cities in China. Based on the accessibility, integrity, consistency, and quality of the data, five phases of Landsat satellite remote sensing images in 1987, 1995, 2003, 2010, and 2017 were selected as databases. Land use types in remote sensing images were identified by comprehensive index methods and threshold methods to obtain construction land data. Two indicators of "average annual growth" and "growth dynamic degree" were used to reflect the growth rate characteristics of construction land in each district of Guangzhou. The expansion spatial-temporal characteristics of construction land in different periods from 1987 to 2017 in Guangzhou were investigated using grid analysis, cluster analysis, and outlier analysis. Furthermore, the influencing factors of construction land expansion were analyzed in terms of population and economic development, land and urban construction policies, administrative region adjustment, and urban development planning. The results show that: (1) Construction land has grown in Guangzhou has grown in cycles of fast and slow growth over 30 years, and it experienced rapid expansion twice in 1987-1995 and 2004-2010. (2) The main direction of growth differed across in different periods. From 1987 to 1995, the growth mainly occurred in Tianhe District and Huangpu District, and it extended toward the east. From 1996 to 2003, the main urban area of Guangzhou extended to the east, north, and south simultaneously. The main feature of construction land growth from 2004 to 2010 was high-speed growth in the periphery of the main urban area. From 2010 to 2017, the growth rate of construction land in each district slowed down dramatically, and the growth was further concentrated in the peripheral areas. (3) The type of growth in Guangzhou transitioned from spreading growth to independent growth. From 1987-1995 to 1995-2003, the spreading growth characteristics of construction land in Guangzhou intensified gradually: the urban built-up area increased by expanding boundaries of the urban construction land. During 2004-2010 and 2011-2017, the spreading growth characteristics of construction land decreased significantly, while the independent growth characteristics increased. This was manifested as the accelerated development of relatively independent small towns out of the concentrated built-up regions, as well as the development and construction of parks. (4) The economic development indicators that are closely related to the growth of construction land were different in different periods. The growth of construction land during 1987-1995 was mainly affected by input factors. From 1995 to 2003, the growth of construction land was mainly stimulated by the accelerated growth of enterprises and employment population. There was a significant correlation between the average annual growth rate of construction land in 2003-2010, the average annual growth rates of the added value of the second industry, and the actual utilization of foreign capital. From 2010 to 2017, economic growth was gradually decoupled from growth of construction lands, but it maintained a close relationship with the growth of the resident population. (5) Expansion of construction land in Guangzhou was influenced by social-economic and population characteristics, land and urban construction policies, administrative division adjustments, and urban development plans. Specifically, land and urban construction policies, urban development plans, and administrative planning had significant influences on the growth of construction land. Growth of construction land has obvious relationships with population growth and economic development.

Key words: Guangzhou, construction land, expansion, satellite remote sensing, influencing factors.

摘要： 以五期遥感影像为基础，结合社会经济数据，综合运用网格化分析、聚类和异常值分析、皮尔逊相关分析等方法，研究了广州市1987-2017年30年间不同时段建设用地扩张特征及影响因素。广州市建设用地增长速率在30年中先后呈现快-慢-快-慢的波浪式变化特征，增长的重点方向呈现向东延伸逐渐过渡到同时向东、南、北增长； 2010年后着重发展特定区域；建设用地蔓延式增长特征在1995～2003年时段达到最高，随后独立式增长特征逐渐明显。不同时段中与建设用地扩张关系密切的经济发展指标有所不同，土地与城建政策、行政区划调整、城市发展规划等对建设用地增长影响显著。

关键词: 广州市, 建设用地, 扩张, 遥感, 影响因素