Detection of Soil Erosion Hotspots in the Croplands of a Typical Black Soil Region in Northeast China: Insights from Sentinel-2 Multispectral Remote Sensing
文献类型: 外文期刊
第一作者: Qi, Lulu
作者: Qi, Lulu;Shi, Pu;Sun, Qi;Qi, Lulu;Shi, Pu;Dvorakova, Klara;Van Oost, Kristof;van Wesemael, Bas;Yu, Hanqing
作者机构:
关键词: soil erosion; northeast China; Sentinel-2; multitemporal composite; mapping; SOC
期刊名称:REMOTE SENSING ( 影响因子:5.0; 五年影响因子:5.6 )
ISSN:
年卷期: 2023 年 15 卷 5 期
页码:
收录情况: SCI
摘要: Global efforts to restore the world's degraded croplands require knowledge on the degree and extent of accelerated soil organic carbon (SOC) loss induced by soil erosion. However, the methods for assessing where and to what extent erosion takes place are still inadequate for precise detection of erosion hotspots at high spatial resolution. Drawing on recent advances in multitemporal Sentinel-2 remote sensing to create a bare soil composite that reflects erosion-induced variations in soil spectral signatures, this study attempted to develop a spectra-based soil erosion mapping approach to pinpoint eroded hotspots in a typical catchment located in the black soil region of northeast China as characterized by undulating landscapes. We built a ground-truth dataset consisting of three classes of soils representing Severe, Moderate and Low erosion intensity because of their inter-class contrasts in estimated erosion rates from Cs-137 tracing. The spectral separability of different erosion classes was first tested by a combined principal component and linear discriminant analysis (PCA-LDA) against laboratory hyperspectral data and then validated against Sentinel-2-derived broadband spectra. The results show that PCA-LDA produced excellent classification accuracy (Kappa coefficient > 0.9) for both data sources and even more so for Sentinel-2 spectra, highlighting the effectiveness of the multitemporal approach to extract bare soil pixels. Further investigations into the spectral curves enabled identification of distinctive spectral features representative of shifting soil albedo and biochemical composition due to erosion-induced SOC mobilization. A classification scheme comprising the spectral features was applied to the Sentinel-2 bare soil composite for pixel-wise soil erosion mapping, in which 15.9% of the cropland area was detected as erosion hotspots, while the Moderate class occupied 65.4%. Comparing the erosion map to a NDVI map demonstrated the negative impact of soil erosion on crop growth from a spatial perspective, highlighting the potential of the proposed approach to aid targeted cropland management for food security and climate.
分类号:
- 相关文献
作者其他论文 更多>>
-
Integration effect of vetiver grass strips with maize population density on soil erosion under two contrasting slopes of rainforest agroecology
作者:Oshunsanya, Suarau Odutola;Yu, Hanqing;Oshunsanya, Suarau Odutola;Odebode, Ayodeji Matthew;Oluwatuyi, Tunde Samuel;Babalola, OlaOlu;Opara, Chukwufmeka Christopher
关键词:Vetiver grass strips; Low and high maize populations; Slope gradient; Water erosion; Maize yield
-
A rapid selection strategy for umami peptide screening based on machine learning and molecular docking
作者:Li, Chen;Pan, Daodong;Qi, Lulu;Xiong, Yongzhao;Dang, Yali;Hua, Ying;Xiao, Chaogeng;Lu, Wenjing;Gao, Xinchang;Zhao, Yufen;Zhao, Yufen
关键词:Machine learning; Molecular docking; Umami peptide; Lamb bone
-
Functional Characterization of a New Salt Stress Response Gene, PeCBL4, in Populus euphratica Oliv
作者:Qu, Meiqiao;Sun, Qi;Chen, Ningning;Chen, Zhuoyan;An, Yi;Zhang, Hechen;Lv, Fuling
关键词:Populus euphratica; salt stress; potassium stress; calcineurin B-like protein
-
Identification of SNP loci and candidate genes genetically controlling norisoprenoids in grape berry based on genome-wide association study
作者:Sun, Qi;He, Lei;Fu, Ya-Qun;Sun, Zheng-Yang;Duan, Chang-Qing;Pan, Qiu-Hong;Sun, Qi;He, Lei;Fu, Ya-Qun;Sun, Zheng-Yang;Duan, Chang-Qing;Pan, Qiu-Hong;Sun, Lei;Xu, Hai-Ying;Zhu, Bao-Qing
关键词:grape berry; norisoprenoids; single nucleotide polymorphism; genome-wide association study; genetic regulation
-
Protective efficacy of a candidate live attenuated vaccine derived from the SD-R strain of lineage 1 porcine reproductive and respiratory syndrome virus against a lethal challenge with HP-PRRSV HuN4 in piglets
作者:Zhang, Hongliang;Li, Chao;Xu, Hu;Gong, Bangjun;Li, Wansheng;Guo, Zhenyang;Xiang, Lirun;Sun, Qi;Zhao, Jing;Peng, Jinmei;Wang, Qian;Zhou, Guohui;Tang, Yan-Dong;An, Tongqing;Cai, Xue-Hui;Tian, Zhi-Jun
关键词:lineage 1; attenuated vaccine; SD-R; HP-PRRSV HuN4; cross-protection efficacy
-
Novel sediment source fingerprinting quantifying erosion-induced total nitrogen and total phosphorus outputs from an intensive agricultural catchment, North China
作者:Yu, Hanqing;Oshunsanya, Suarau Odutola;Liu, Wenxiang;Zheng, Yu;Xue, Tingting;Adu-Gyam, Joseph;Heng, Lee;Oshunsanya, Suarau Odutola;Chappell, Adrian;Liu, Wenxiang
关键词:
-
Genomic characteristics of a novel emerging PRRSV branch in sublineage 8.7 in China
作者:Li, Wansheng;Li, Chao;Guo, Zhenyang;Xu, Hu;Gong, Bangjun;Sun, Qi;Zhao, Jing;Xiang, Lirun;Peng, Jinmei;Zhou, Guohui;Tang, Yandong;Liu, Huairan;An, Tongqing;Cai, Xue-Hui;Tian, Zhi-Jun;Wang, Qian;Zhang, Hongliang;Leng, Chaoliang
关键词:PRRSV; new branch; sublineage 8; 7; 1+8+1; genomic characteristics