摘要
持续地开展国家尺度土地利用/覆盖变化遥感监测对于新时代国土空间规划和“美丽中国”蓝图绘制具有重要的科学价值。本文采用Landsat 8 OLI、GF-2等卫星遥感数据,融合遥感大数据云计算和专家知识辅助人机交互解译方法,研发了中国土地利用变化(2015—2020年)和2020年土地利用现状矢量数据(CLUD 2020),建立了完整的30 a(20世纪80年代末—2020年)每隔5 a的30 m分辨率中国土地利用动态数据库。基于CLUD 2020数据,从全国和区域两个尺度揭示了2015—2020年中国土地利用变化的总体规律、区域分异和主要特征。研究表明:将遥感大数据云计算生成的30 m分辨率植被覆盖变化和地表类型变化检测信息融入到人机交互遥感解译方法,可有效地提高大范围土地利用变化遥感制图的效率和变化图斑辨识的准确性;精度评价表明,CLUD 2020一级类型制图的综合精度达95%。总体上,全国范围内国土空间开发强度与2010—2015年比较进入相对稳定状态。期间全国耕地面积仍保持减少态势,空间分异特征为耕地南减北增,东北松嫩平原及其与三江平原交界区大规模的旱地向水田转移,西北新疆南部开垦和北部退耕/撂荒并存;全国城乡建设用地持续增加,空间分异特征表现为由以往的沿海地区和超大、大城市集聚转向中西部地区的大中小城镇周边蔓延为主。全国范围的林草自然生态用地面积持续减少,但强度与2010—2015年比较有所下降;受气候变化的持续影响,青藏高原地区的河流湖泊等水域面积显著增加。以上土地利用变化格局与“十三五”期间国家高质量发展、生态文明建设宏观战略和气候变化的影响密切相关。
The continuous remote sensing monitoring of land use/cover change at the national scale is of great scientific significance for land spatial planning and blueprint drawing of"Beautiful China"in the new era.Landsat 8 OLI,GF-2 and other satellite remote sensing data were used to develop the data of land use change across China during 2015-2020 and China Land Use/Cover Dataset in 2020(CLUD 2020)by integrating remote sensing big data and expert knowledge-assisted human-computer interaction interpretation methods.Long time series land use dynamic database at a 30-m resolution in China was established at 5-year interval in the end of 1980s-2020.On this basis,the general trend,regional differences and main characteristics of land use change in 2015-2020 were revealed from national and regional scales.The research indicated that integrating vegetation cover change at a 30-m resolution and land change information generated by remotely sensed big-data cloud calculation into the expert humancomputer interaction interpretation can effectively improve the efficiency of mapping and the accuracy of land use change detection.The overall accuracy of CLUD 2020 first-level type mapping reaches 95%.In general,the intensity of territorial development entered a stable state compared with 2010-2015.During the period,the cropland continued to decrease.Nationwide farmland was encroached by urban development and construction,paddy fields in Northeast China continued to decrease,and cultivated land in Xinjiang was reclaimed in the south and abandoned in the north.The built-up land continued to increase,showing a spatial pattern that"the expansion of built-up land changed from the agglomeration of coastal areas and mega and large cities in 2010-2015 to the surrounding sprawl of large,medium and small towns in the central and western regions in 2015-2020".Although the area of natural ecological land for forest and grass continued to decrease nationwide,the intensity decreased compared with 2010-2015.Under the continuous impact of climate change,the area of water in the Qinghai-Tibet Plateau increased significantly.The pattern of land use change is closely related to the national macro strategy for high-quality development during the"13^(th) Five-Year Plan"period(2016-2020)and ecological civilization construction,as well as the impact of climate change.
作者
匡文慧
张树文
杜国明
颜长珍
吴世新
李仁东
陆灯盛
潘涛
宁静
郭长庆
董金玮
包玉海
迟文峰
窦银银
侯亚丽
尹哲睿
常丽萍
杨久春
谢家丽
邱娟
张汉松
张宇博
杨仕琪
萨日盖
刘纪远
KUANGWenhui;ZHANG Shuwen;DU Guoming;YAN Changzhen;WU Shixin;LI Rendong;LU Dengsheng;PAN Tao;NING Jing;GUO Changqing;DONG Jinwei;BAO Yuhai;CHIWenfeng;DOU Yinyin;HOU Yali;YIN Zherui;CHANG Liping;YANG Jiuchun;XIE Jiali;QIU Juan;ZHANG Hansong;ZHANG Yubo;YANG Shiqi;SA Rigai;LIU Jiyuan(Key Laboratory of Land Surface Pattern and Simulation,Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing 100101,China;Northeast Institute of Geography and Agroecology,CAS,Changchun 130102,China;Northeast Agricultural University,Harbin 150030,China;Northwest Institute of Eco-Environment and Resources,CAS,Lanzhou 730000,China;Xinjiang Institute of Ecology and Geography,CAS,Urumqi 830011,China;Innovation Academy for Precision Measurement Science and Technology,CAS,Wuhan 430071,China;Fujian Normal University,Fuzhou 350007,China;Qufu Normal University,Rizhao 276826,Shandong,China;Inner Mongolia Normal University,Hohhot 010028,China;Inner Mongolia University of Finance and Economics,Hohhot 010070,China;University of Chinese Academy of Sciences,Beijing 100049,China;Jilin University,Changchun 130000,China)
出处
《地理学报》
EI
CSSCI
CSCD
北大核心
2022年第5期1056-1071,共16页
Acta Geographica Sinica
基金
中国科学院战略性先导科技专项(XDA23100201)
国家重点研发计划(2018YFC1800103)
第二次青藏高原综合科学考察研究(2019QZKK0608)。
关键词
土地利用
空间格局
耕地变化
城市扩展
云计算
遥感
中国
land use
spatial pattern
cultivated land
urban expansion
cloud computation
remote sensing
China
