摘要
[目的]对四川省南充市15 a间土地利用/覆被的时空变化特征及其驱动因素进行分析,为南充市的生态环境建设与可持续发展提供科学依据。[方法]基于南充市2000,2010,2015年3期Landsat影像和QuickBird高精度遥感数据,计算2000-2015年土地利用/覆被转移矩阵和土地利用/覆被状况指数。[结果]①近15 a来,南充市的土地利用/覆被类型以耕地和林地为主,约占研究区面积的80%,但各土地利用/覆被类型间都有不同程度的相互转换。②研究期内,林地面积增加1006.2 km^2,主要由耕地和草地转化而来;建设用地面积增加965.4 km^2,多由水体和耕地转化而来,而耕地、草地和水体面积分别减少了1 549.8,307.9,90.4 km^2。③近15 a来,南充市土地利用/覆被状况指数变化表明,林地和建设用地呈转好趋势(土地利用/覆被状况变化率为正值),耕地呈转差趋势(土地利用/覆被状况变化率为负值)。[结论] 2000-2015年南充市土地利用/覆被变化明显,其中,地形、人口、城市化水平和退耕还林工程等是造成南充市土地利用/覆被变化的主要驱动因素。
[Objective] The temporal and spatial change characteristics and driving factors of land use/cover during 2000-2015 were analyzed to provide a scientific basis for the ecological environment construction and sustainable development of Nanchong City, Sichuan Province. [Methods] Based on Landsat images and QuickBird high-precision remote sensing data in 2000, 2010, and 2015, the direction and amplitude of land use/cover change and land use/cover condition index were calculated. [Results] ① Over the past 15 years, cultivated land and woodland have been the major land use/cover types in Nanchong City, accounting for approximately 80%;however, there were varying degrees of mutual conversion among land use/cover types. ② The area of woodland increased by 1 006.2 km^2, which was mainly converted from cultivated land and grassland, whereas the area of construction land increased by 965.4 km^2, which was mostly converted from water and cultivated land. The area of cultivated land, grassland, and waterbody were reduced by 1 549.8, 307.9, and 90.4 km^2, respectively. ③ Over the past 15 years, the change in the land use/cover condition index showed a good trend for the woodland and construction land(i.e., the condition index change rate of land use/cover was positive), whereas the cultivated land showed a slip trend(i.e., the condition index change rate of land use/cover was negative). [Conclusion] During the past 15 years, the land use/cover in Nanchong City has changed greatly. The major driving factors of land use/cover change in Nanchong City were topography, population, urbanization level, and returning farmland to forestry.
作者
朱丽辉
徐瑶
杜忠
Zhu Lihui;Xu Yao;Du Zhong(School of Land and Resources,China West Normal University,Nanchong,Sichuan 637009,China)
出处
《水土保持通报》
CSCD
北大核心
2019年第5期257-261,I0003,共6页
Bulletin of Soil and Water Conservation
基金
四川省科技厅应用基础项目“川中丘陵区退耕还林工程的生态响应”(2014SZ0070)
四川省科技厅应用基础研究重点项目(2018JY0086)
西华师范大学博士科研启动基金项目(17E038)
关键词
土地利用/覆被变化
驱动因素
南充市
遥感
land use/cover change
driving factors
Nanchong City
remote sensing
