摘要
土地扰动的时空演变反映该地区经济发展水平的同时,也成为宏观规划与城市建设的依据。为高效快速地监测土地扰动,基于2000~2020年的Landsat系列(Landsat-5 TM、Landsat-7 ETM+、Landsat-8 OLI)遥感卫星影像,采用连续扰动监测(Continuous Monitoring of Land Disturbance,COLD)算法对福建省长汀县近20 a土地扰动变化及生产建设项目施工扰动进行监测,探讨5 a(2016~2020年)、10 a(2011~2020年)以及21 a(2000~2020)不同时间长度序列对新增年份监测结果的影响。结果表明:①COLD算法能够获得各年累计变化、年内变化等信息;②近20 a来,长汀县土地扰动在空间上主要集中分布在中部地区,四周山区扰动较少;③生产建设项目发生扰动大部分集中于第三季度,第一季度扰动最少;④对于新增年份2020年的中大型生产建设项目扰动监测,在多云多雨地区,10 a时间长度数据才能获得比较满意的监测结果。
The dynamics of land disturbance in a region reflect its economic development,and can thus be used as an indicator for regional planning and construction.To improve the efficiency and effectiveness of land disturbance monitoring,we use a Continuous Monitoring of Land Disturbance(COLD)algorithm to detect the changes of land disturbance and monitor the disturbance of production and construction projects in Changting County,Fujian Province,using time-series remote sensing images acquired from Landsat satellites(i.e.,Landsat 5 TM,Landsat 7 ETM+,and Landsat 8 OLI)from 2000 to 2020 years.In this paper,we investigate the influence of the length of time series,i.e.,5-year(2016~2020),10-year(2011~2020),and 21-year(2000~2020),on predicting results for unknown years.Results show that:(1)COLD can identify land changes within a year,and cumulative changes for a time series;(2)Over the past 20 years,the land disturbance of Changting County mainly distributed in its central region,with less disturbance surrounding in mountainous areas;(3)Most of the disturbances of production and construction projects occurred in the third quarter,followed by the first quarter;(4)For cloudy and rainy areas,it is suggested to have a longer time-series(e.g.,≥10-year)to maintain a satisfactory result for monitoring the disturbance of medium and large-scale production and construction projects in 2020.
作者
李琳
汪小钦
刘益锋
丁书培
陈芸芝
LI Lin;WANG Xiaoqin;LIU Yifeng;DING Shupei;CHEN Yunzhi(The Academy of Digital China(Fujian),Fuzhou University,Fuzhou 350108,China;Key Laboratory of Spatial Data Mining and Information Sharing of Ministry of Education,Fuzhou 350108,China;National&Local Joint Engineering Research Center of Satellite Geospatial Information Technology,Fuzhou 350108,China)
出处
《遥感技术与应用》
CSCD
北大核心
2023年第2期308-318,共11页
Remote Sensing Technology and Application
基金
中央引导地方科技发展专项(2017L3012)
福建省高校产学研重点项目(2017Y4010)。
关键词
变化监测
土地扰动
COLD
时间序列
长汀县
Change monitoring
Land disturbance
COLD
Time series
Changting county
