内蒙古十大孔兑流域土地利用变化特征及驱动力
Land use change characteristics and driving forces in the Ten Tributaries Basin,Inner Mongolia
武娟娟 1杜军 2旭日干 3王文 2苗晨鑫 1任侠 3杨志如 3曹方圆 3毛明月3
作者信息
- 1. 中国科学院西北生态环境资源研究院临泽内陆河流域研究站,甘肃兰州 730000;中国科学院大学,北京 100049
- 2. 中国科学院西北生态环境资源研究院临泽内陆河流域研究站,甘肃兰州 730000
- 3. 鄂尔多斯市水利事业发展中心,内蒙古鄂尔多斯 017010
- 折叠
摘要
基于1990-2020年4期Landsat卫星30 m分辨率遥感影像,解译并获取了土地利用/覆被信息,采用动态变化率和土地利用转移矩阵方法,系统分析了十大孔兑流域在过去30年的土地利用时空变化规律,同时借助随机森林模型,对土地利用结构转变的驱动力进行了探究.结果表明:(1)研究时段内,林地持续扩大,沙地面积逐渐缩小,建设用地增加最显著(47.5％),其次为林地(36.8％),其余各组分结构均未发生剧烈变动;(2)土地利用类型间发生着频繁的属性转化,以耕地与草地的互转、草地与沙地向林地和建设用地的转化为主要特征;(3)相对于气候变化,人类活动在驱动流域土地利用结构转变进程中发挥着主导作用,突出地体现在林地的转入、草地和建设用地的转出及沙地的转化动态等方面.
Abstract
Based on Landsat satellite imagery with a resolution of 30 meters covering the period from 1990 to 2020,land use/land cover information was interpreted and extracted.The study used dynamic change rate and land use transfer matrix methods to systematically analyze the spatiotemporal patterns of land use changes in the Ten Tributaries Basin over the past three decades.Additionally,using the Random Forest models,the driving forces of the structural transformation of land use were explored.The results showed that:(1)During the study period,forest area continued to expand,while sandy areas gradually decreased.The most significant increase was observed in construction land(47.5％),followed by forest land(36.8％),with no drastic changes in the structure of other components.(2)Frequent attribute transformations occurred among land use types,with mutu-al transformation between farmland land and grassland,and conversions from grassland and sandy land to forest land and construction land being the main characteristics.(3)In comparison to climate change,human activities played a predominant role in driving the structural transformation of land use in the basin,which were particular-ly reflected in the input of forest land,the output of grassland and construction land,and the transformation dy-namics of sandy land.
关键词
土地利用/时空特征/变化规律/驱动力/十大孔兑流域Key words
land use/spatiotemporal characteristics/change patterns/driving forces/Ten Tributaries Basin引用本文复制引用
出版年
2024
NETL
NSTL
万方数据