清晨好,您是今天最早来到科研通的研友!由于当前在线用户较少,发布求助请尽量完整地填写文献信息,科研通机器人24小时在线,伴您科研之路漫漫前行!

Mapping abandoned cropland using Within-Year Sentinel-2 time series

归一化差异植被指数 自然地理学 土地利用 遥感 环境科学 土地复垦 地理 气候变化 地质学 海洋学 工程类 土木工程 考古
作者
Bo Liu,Wei Song
出处
期刊:Catena [Elsevier BV]
卷期号:223: 106924-106924 被引量:17
标识
DOI:10.1016/j.catena.2023.106924
摘要

Against the background of the COVID-19 pandemic and various armed conflicts, the world is experiencing an unprecedented food crisis. The reclamation of abandoned cropland with food production potential may increase the global food supply in a short period of time, ensuring food security. At present, the extraction of abandoned cropland is mainly based on low- and medium-resolution remote sensing image data, making it difficult to extract fragmented areas in mountainous regions and to distinguish between abandoned cropland and transitional classes (such as fallow cropland). We developed a change-detection method based on within-year Sentinel-2 time series to extract cropland abandoned from 2018 to 2021 and defined four types of croplands, namely spontaneously abandoned, induced abandoned, fallow, and lost cropland, using Linxia County in mountainous China as the study region. First, cropland objects were generated from multi-temporal Sentinel-2 images using the multi-resolution segmentation method, and the land use map of Linxia County from 2017 to 2021 was drawn using random forest classifier. Second, through defining and identifying different cropland types, the interannual dynamic changes in cropland from 2018 to 2021 were extracted by analyzing the annual land use change trajectory. Third, by analyzing the normalized difference vegetation index (NDVI) time series of cropland within-year, the active and cultivated cropland sites within-year were extracted by threshold segmentation. Finally, the changes in the four cropland types were extracted by intersecting the two result types. Our method captured the object level changes well (overall mapping accuracy = 93 ± 5 %), and the extraction accuracy of abandoned cropland reached 81 ± 2 %. Abandoned cropland was mostly located in areas of medium quality and with a moderate distance from rural settlements. Reclamation can potentially increase the grain production in Linxia County by at least 3.6 % and needs to be combined with the local natural geography and human activities. Our method is a robust method for extracting abandoned cropland and may be applied to other research related to land use change.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
小小完成签到,获得积分10
7秒前
大力的紊发布了新的文献求助50
14秒前
15秒前
ceeray23发布了新的文献求助20
20秒前
CHEN完成签到 ,获得积分10
35秒前
LJ_2完成签到 ,获得积分10
49秒前
dingding发布了新的文献求助10
54秒前
58秒前
laber完成签到,获得积分0
59秒前
zxx完成签到 ,获得积分10
1分钟前
开心完成签到 ,获得积分10
1分钟前
虞无声完成签到,获得积分10
1分钟前
1分钟前
harden9159完成签到,获得积分10
1分钟前
wbh发布了新的文献求助10
1分钟前
追梦完成签到,获得积分10
1分钟前
万能图书馆应助wbh采纳,获得10
1分钟前
如意的馒头完成签到 ,获得积分10
1分钟前
大力的紊完成签到,获得积分10
1分钟前
完美世界应助科研通管家采纳,获得10
2分钟前
科研通AI2S应助科研通管家采纳,获得10
2分钟前
丘比特应助科研通管家采纳,获得10
2分钟前
Kevin完成签到,获得积分10
2分钟前
2分钟前
Xu完成签到,获得积分10
2分钟前
ceeray23发布了新的文献求助20
2分钟前
mike2012完成签到 ,获得积分10
2分钟前
lilaccalla完成签到 ,获得积分10
2分钟前
YifanWang完成签到,获得积分0
2分钟前
2分钟前
如意枫叶发布了新的文献求助10
2分钟前
空白完成签到 ,获得积分10
2分钟前
拼搏的败完成签到 ,获得积分10
2分钟前
2分钟前
ceeray23发布了新的文献求助20
2分钟前
安安完成签到 ,获得积分10
2分钟前
淡然以柳完成签到 ,获得积分10
3分钟前
赘婿应助QQQQQQQ采纳,获得30
3分钟前
3分钟前
如意枫叶发布了新的文献求助10
3分钟前
高分求助中
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
基于可调谐半导体激光吸收光谱技术泄漏气体检测系统的研究 350
Robot-supported joining of reinforcement textiles with one-sided sewing heads 320
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3990793
求助须知:如何正确求助?哪些是违规求助? 3532233
关于积分的说明 11256590
捐赠科研通 3271081
什么是DOI,文献DOI怎么找? 1805229
邀请新用户注册赠送积分活动 882302
科研通“疑难数据库(出版商)”最低求助积分说明 809234