珠江口作为我国经济发展最活跃的区域, 经历着快速城市化与工业化进程, 各项资源的有效可持续利用成为人们开发利用空间资源所追求的目标。根据珠江口3个时相的多源遥感信息与常规调查数据予以分类系统和空间精度的一致化处理, 挖掘提取了相同空间尺度和精度的养殖信息, 并引入单一土地利用动态度、景观破碎度模型与区域面积分布统计变化和重心迁移等多模型空间信息分析。量化结果表明, 养殖区面积从1985年的125.49km2增加到2005年的345.20km2, 是1985年的2.75倍, 1985—1995年的养殖区面积年均增长率为14.30%, 1995年以后面积年均增长率下降到1.32%; 1985—2005年的20年间养殖区破碎度逐渐增加, 由1985年的0.000015增加到2005年的0.002824; 20年间珠江口各市养殖面积变化呈现区域性差异, 广州、东莞和珠海三市呈现持续增加趋势, 增长速度差异较大, 而中山和深圳两市则先增长后下降。综合分析得出养殖区分布重心整体向西北迁移。

The Zhujiang River Estuary, the most active region in China's economic development, is experiencing rapid urbanization and industrialization, of which effective sustainable use of the funding sources becomes an ultimate goal to develop and utilize space technology and resources. In this article the authors mined and extracted the farming information with the same spatial scale and precision based on the analysis of data from the three-phase multi-source remote sensing information of the Zhujiang River Estuary and conventional survey with classification system and spatial accuracy consistency, to introduce the model of single land use dynamic index, the landscape fragmentation, and multi-model analysis of spatial information such as changes in the distribution area statistics and the gravity center. Quantified results show that from 1985 to 2005 aquaculture area increased from 125.49km2 to 345.20km2, 2.75 times as large as that in 1985. The average annual growth rate of aquaculture area was 14.30% between 1985 and 1995, and dropped to 1.32% after 1995. In the past 20 years from 1985 to 2005, the fragmentary degree of aquaculture area gradually increased from 0.000015 to 0.002824. The change of aquaculture area presented regional differences for the five cities in the Zhujiang River Estuary. The growth rate in Guangzhou, Dongguan and Zhuhai City kept going up, with quite large difference among them; but for Zhongshan and Shenzhen, the growth rate dropped after a period of increment. Comprehensive analysis leads to the conclusion that the gravity center of the aquaculture area migrated to the northwest in the whole.