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Paddy Rice Phenological Mapping throughout 30-Years Satellite Images in the Honghe Hani Rice Terraces

文献类型： 外文期刊

作者： Yang, Jianbo 1 ; Xu, Jianchu 1 ; Zhou, Ying 5 ; Zhai, Deli 6 ; Chen, Huafang 1 ; Li, Qian 1 ; Zhao, Gaojuan 1 ;

作者机构： 1.Chinese Acad Sci, Kunming Inst Bot, Ctr Mt Futures, Kunming 650201, Peoples R China

2.Chinese Acad Sci, Kunming Inst Bot, Dept Econ Plants & Biotechnol, Yunnan Key Lab Wild Plant Resources, Kunming 650201, Peoples R China

3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

4.World Agroforestry ICRAF, CIFOR ICRAF China Program, Kunming 650201, Peoples R China

5.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China

6.Chinese Acad Sci, CAS Key Lab Trop Forest Ecol, Xishuangbanna Trop Bot Garden, Mengla 666303, Peoples R China

关键词： Honghe Hani Rice Terraces; Landsat; land use/land cover; phenology; Google Earth Engine

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 9 期

页码：

收录情况： SCI

摘要： The Honghe Hani Rice Terraces represent the coexistence between natural and cultural systems. Despite being listed as a World Heritage Site in 2013, certain natural and anthropogenic factors have changed land use/land cover, which has led to a reduction in the size of the paddy rice area. It is difficult to accurately assess these changes due to the lack of historical maps of paddy rice croplands with fine spatial resolution. Therefore, we integrated a random forest classifier and phenological information to improve mapping accuracy and stability. We then mapped the historical distribution of land use/land cover in the Honghe Hani Rice Terraces from 1989-1991 to 2019-2021 using the Google Earth Engine. Finally, we analyzed the driving forces of land use types in the Honghe Hani Rice Terraces. We found that: (1) forests, shrubs or grasslands, and other croplands could be discriminated from paddy rice during the flooding and transplanting period, and water bodies and buildings could also be discriminated from paddy rice during the growing and harvesting period. (2) Inputting phenological feature data improved mapping accuracy and stability compared with single phenological periods. (3) In the past thirty years, 10.651%, 8.810%, and 5.711% of paddy rice were respectively converted to forests, shrubs or grasslands, and other croplands in the Honghe Hani Rice Terraces. (4) Lower agricultural profits and drought led to problems in identifying the driving mechanisms behind paddy rice distribution changes. This study demonstrates that phenological information can improve the mapping accuracy of rice terraces. It also provides evidence for the change in the size of the rice terrace area and associated driving forces in Southwest China.

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