摘要
根据西藏多布电站的建成日期,选择2011和2016年共2期Landsat卫星影像资料及其他辅助资料,运用遥感(RS)人机交互目视解译方法进行监督分类,并应用地理信息系统(GIS)的空间分析和统计功能,分别制作了2期土地利用类型图及2011~2016年的土地利用类型动态变化图,结合Excel数据透视表生成了土地利用面积转移矩阵。分析了西藏林芝多布电站区域土地利用类型之间的转化情况及其时空动态变化特征,结果表明:(1)在林芝多布电站库区2011~2016年这5年间,各土地利用类型都有不同程度的变化,其中建设用地和水域年变化速率较大,分别为13.61%和10.90%;(2)5年间研究区各类型面积占比中,草地、建设用地和水域变化幅度最大,变化面积分别为-35.378 km^2、16.377 km^2、23.186 km^2,除了水域和建设用地面积处于增加态势外,其他类型面积在减少;(3)5年来耕地面积减少部分主要转化为水域,集中分布于电站上游;林地减少部分主要转化为建设用地,片状分布于水域左岸坡地;草地减少部分主要转化为耕地和建设用地,并集中分布于大坝上下游5 km范围内的两部分;水域面积增加部分主要由草地、建设用地和耕地转化而来,集中分布于上游坝塘汇水区;建设用地增加部分主要由草地转化而来,集中分布于大坝上游和下游6 km处,且多分布在左岸。总体来看,5年来土地利用变化存在着较为明显的差异,且多集中于大坝6 km范围内。
According to the completion date of Tibet Duobu power station,two phases of Landsat satellite image data and other auxiliary data in 2011 and 2016 were selected,and the remote sensing(RS)human-computer interaction visual interpretation method was used for supervised classification and applied to the geographic information system(GIS).The spatial analysis and statistical functions of the land use type map and the dynamic change map of land use type from 2011 to 2016 were respectively generated,and the land use area transfer matrix was generated by using Excel Pivot Table.The conversion between land use types and their temporal and spatial dynamics in the Nyingchi Duobu power station in Tibet were analyzed.The results showed as follows:(1)During the five years from 2011 to 2016 in the Dobu hydropower station reservoir area of Nyingchi,various land use types changed to varying degrees,among which the annual change rate of construction land and water area was 13.61%and 10.90%,respectively.(2)Among all types of areas in the study area,the grassland,construction land and water area had the largest change,and the change area was-35.378 km^2,16.377 km^2,23.186 km^2,respectively.Except for the increase of water area and construction land area,other types of area were decreasing.(3)The reduction of cultivated land area in the past 5 years was mainly converted into water area,which was concentrated in the upstream of the power station.It is mainly converted into construction land,which was distributed on the left bank slope of the water flow.The reduction of grassland was mainly converted into cultivated land and construction land,and was concentrated in two parts within 5 km of the upstream and downstream of the dam;the increase of water area was mainly caused by grassland and construction.The increased construction land was mainly converted from grassland,which was mainly distributed at 6 km upstream and downstream of the dam,and mostly distributed on the left bank.On the whole,there were obvious differences in land use change over the past five years,and most of them were concentrated within 6 km of the dam.
作者
苏立彬
郭永刚
吴悦
杨永涛
SU Libin;GUO Yonggang;WU Yue;YANG Yongtao(Res.Institute of Tibet Plateau Ecology,Tibet Agriculture&Animal Husbandry University;Water Conservancy Project&Civil Engineering College,Tibet Agriculture&Animal Husbandry University,Nyingchi Tibet,860000,China)
出处
《高原农业》
2020年第1期75-81,58,共8页
Journal of Plateau Agriculture
基金
西藏自治区重点科研项目(XZ201703-GC-11)“西藏农业虚拟现实技术与大数据系统平台系统研发”
作者简介
苏立彬(1983-),男,汉族,山东泰安人,讲师,在读博士研究生。研究方向:高原生态修复与可持续发展;通讯作者:郭永刚(1966-),男,汉族,黑龙江双城人,教授,博士。研究方向:水利水电工程强震安全监测与水工结构地震危险性安全评价分析以及高原生态可持续发展。
