涪江流域土地利用变化及其驱动力分析

Study on Land Use Change and its Driving Forces in Fujiang River Basin

为了掌握涪江流域土地利用格局变化及其驱动机制,本文采用空间主成分分析法、土地利用转移矩阵等方法,对涪江流域2001-2018年土地利用状况进行了研究.结果显示(1)2001-2018年涪江流域土地利用总体格局以耕地和林地为主,占比约93%,草地、水域、耕地、建设用地和其他用地的占比均较小;(2)2001-2018年,涪江流域耕地、草地、建设用地、水域面积分别增加3611.12、90.03、251.54、221.45 km^(2),而林地、其他用地面积分别减少4154.35、19.81 km^(2);(3)涪江流域土地利用类型转移比较明显的有9类耕地转林地、耕地转水域、耕地转建设用地、林地转耕地、林地转草地、林地转水域、草地转林地、水域转耕地与水域转林地;(4)分析发现全社会固定资产投资、工业总产值、坡向与粮食总产量是致使涪江流域土地利用变化的主要驱动因素.

In order to understand the change of land use pattern and its driving mechanism in the Fujiang River Basin,the spatial principal component analysis method and land use transfer matrix were used to study the land use situation in the Fujiang River Basin from 2001 to 2018.The results showed that:(1)The overall land use pattern in the Fujiang River Basin from 2001 to 2018 was dominated by cultivated land and woodland,accounting for about 93%,while the proportion of grassland,water area,cultivated land,construction land and other land was small.(2)From 2001 to 2018,the area of cultivated land,grassland,construction land and water area increased by 3611.12 km^(2),90.03 km^(2),251.54 km^(2) and 221.45 km^(2) respectively,while the area of forestland and other land decreased by 4154.35 km^(2) and 19.81km^(2) respectively.(3)There are 9 types of land use transfer in the Fujiang River Basin:cultivated land to forest land,cultivated land to water area,cultivated land to construction land,forest land to cultivated land,forest land to grassland,forest land to water area,grassland to forest land,water area to cultivated land,and water area to forest land.(4)It was found that the investment of fixed assets,total industrial output value,slope aspect and total grain yield are the main driving factors of land use change in the Fujiang River Basin.