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1990-2018年东江流域土地利用变化及其驱动力
邓信翠, 陈洋波
中山大学 地理科学与规划学院, 广东 广州 510275
摘要:
[目的] 分析东江流域1990-2018年土地利用时空变化特征及驱动机制,为该流域土地利用优化提供科学参考。[方法] 利用流域土地利用数据及统计年鉴数据,结合土地利用评价指标、主成分分析法及灰色关联分析法分析流域土地利用变化特征及其驱动机制。[结果] ①东江流域1990-2018年土地利用以耕地和林地为主,流域建设用地面积持续增加,其余地类面积均呈减少趋势,耕地和林地是建设用地面积的主要来源;②流域土地利用综合指数逐年增加,变化率为0.038,土地利用处于上升发展阶段;③流域土地利用变化驱动力主要为经济增长、人口增长、社会富裕程度和农业发展;各类驱动因子对各土地利用类型的驱动作用不同。[结论] 1990-2018年,东江流域土地利用结构不断优化,土地利用集聚程度增加,随着粤港澳大湾区的建设开发,未来流域内土地开发利用活动将更加频繁。
关键词:  土地利用变化  驱动力分析  东江流域
DOI:10.13961/j.cnki.stbctb.2020.06.034
分类号:F301.24
基金项目:国家自然科学基金项目“耦合遥感数据和多学科模型应对全球变化对水文极端事件的影响”(51961125206)
Land Use Change and Its Driving Mechanism in Dongjiang River Basin from 1990 to 2018
Deng Xincui, Chen Yangbo
School of Geography and Planning, Sun Yat-sen University, Guangzhou, Guangdong 510275, China
Abstract:
[Objective] The spatial-temporal change of land use and its driving mechanism in Dongjiang River basin from 1990 to 2018 was analyzed in order to provide support for the land us optimization.[Methods] Four evaluation indexes of land use, principal component analysis and grey relation analysis methods were employed to investigate the land use change and its driving mechanism.[Results] ① From 1990 to 2018, the land use types were mainly forest and farmland, the area of construction land continue to increase, while the area of other land use types decreased. The cultivated land and forest land were the main transferring sources of the construction land. ② The comprehensive land use index of the river basin increased year by year with an annual rate of 0.038, which indicated that the land use was in an upward developing trend. ③ Rapid economic development, population growth, social affluence, and agricultural development were the main driving forces of land use change, while the effects of various driving factors on land use change were different.[Conclusion] From 1990 to 2018, the land use structure of Dongjiang River basin was continuously optimized, while the land use agglomeration was constantly increasing. With the development of the Guangdong-Hongkong-Macao greater bay area, land development and utilization activities will be more frequent within the basin area.
Key words:  land use change  driving force analysis  Dongjiang River basin