人民珠江2023，Vol.44Issue(12)：54-63,10.DOI:10.3969/j.issn.1001-9235.2023.12.006
基于高分一号遥感影像的广州市南沙区土地利用变化特征分析
Characteristics of Land Use Changes in Nansha District,Guangzhou Based on GF-1 Remote Sensing Images
摘要
Abstract
The type of land use can reflect regional economic,social,and ecological benefits.In order to gain a deeper understanding of the composition and changes of land use in Nansha District,this paper selected the GF-1 PMS data in 2016,2017,and 2022 for preprocessing and used support vector machine algorithm oriented to supervised classification for remote sensing image interpretation.According to the results of field investigation and correction,the overall accuracy of the corrected land-use products was above 90％,and the Kappa coefficient was above 0.85.The land use transfer matrix in Nansha District from 2017 to 2021 was constructed,and a comparative analysis was carried out in combination with the land use planning in 2025.In 2017,the main land use type in Nansha District was water area,accounting for 40％.By 2021,the impervious surface has increased by 10％(14.39 km2),mainly from the transfer of cultivated land(8.06 km2)and water area(7.48 km2).The water area has decreased by 3％(10.63 km2),of which the conversion to impervious surface accounts for 70％of the total reduction area;cultivated land,forests,and grasslands have a small reduction.The urbanization process of Huangge Town and Nansha Street is the fastest,and the impervious surface area has increased significantly.The cultivated land in Dongchong Town and Dagang Town has been reduced on a small scale.A large amount of water areas in Wanqingsha Town and Longxue Street have been invaded by impervious surfaces.Compared with the overall urban planning of Nansha District in 2025,except for Zhujiang Street and Wanqingsha Town,the construction of the underlying surface of other towns and streets in Nansha District is basically completed.At the same time,the proportion of water areas,forests,and grasslands in Nansha District that are encroached by impervious surfaces is relatively high.In order to avoid damage to the ecological environment,it is necessary to strike a balance between social and economic development and ecological environment protection.关键词
高分一号/土地利用/转移矩阵/城市化/南沙区Key words
GF-1/land use/transfer matrix/urbanization/Nansha District分类
建筑与水利引用本文复制引用
陈广成,余煌浩,李彬权,陈丞,许栋,孙金彦..基于高分一号遥感影像的广州市南沙区土地利用变化特征分析[J].人民珠江,2023,44(12):54-63,10.基金项目
国家自然科学基金项目(U2240209) （U2240209）
广州市南沙区水务局科技项目(穗南水合2022-263) （穗南水合2022-263）
