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2000-2015年四川省南充市土地利用/覆被变化及其驱动因素
朱丽辉, 徐瑶, 杜忠
西华师范大学 国土资源学院, 四川 南充 637009
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 km2,主要由耕地和草地转化而来;建设用地面积增加965.4 km2,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 km2。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。
关键词:  土地利用/覆被变化  驱动因素  南充市  遥感
DOI:10.13961/j.cnki.stbctb.20190830.001
分类号:TP79;X87
基金项目: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)
Land Use/Cover Change and Its Driving Factors in Nanchong City, Sichuan Province from 2000 to 2015
Zhu Lihui, Xu Yao, Du Zhong
School of Land and Resources, China West Normal University, Nanchong, Sichuan 637009, China
Abstract:
[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 km2, which was mainly converted from cultivated land and grassland, whereas the area of construction land increased by 965.4 km2, 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 km2, 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.
Key words:  land use/cover change  driving factors  Nanchong City  remote sensing