水力发电学报2026，Vol.45Issue(5)：1-15,15.DOI:10.11660/slfdxb.20260501
鄱阳湖湿地水体高精度识别与景观格局高频率动态分析
High-accuracy identification of water bodies and high-frequency dynamic analysis of landscape patterns in Poyang Lake wetlands
摘要
Abstract
As a globally significant floodplain wetland,Poyang Lake features pronounced seasonal variations in its water bodies throughout the year.Accurate identification of the dynamic changes in its water bodies and landscape patterns is crucial to maintaining the stability of its aquatic ecosystem.This paper presents a water body dynamic identification model that we have constructed combining high spatial resolution with high spatiotemporal information.Based on the global surface water dataset JRC-GSW,we first develop a rule-based automatic sampling strategy using multi-source remote sensing data to obtain a high-confidence water body training dataset.Then,a classification model is trained using the Random Forest algorithm,integrating multi-source time-series data to construct a seasonal dynamic feature recognition model for water bodies.In a case study of the Poyang Lake Nanji Wetland National Nature Reserve,this recognition model is applied to examine the 2023 flood season using the data at 10-day intervals and 10-meter resolution.Results demonstrate that it has an enhanced robustness and recognition capability in handling complicated wetland environments,and improves significantly the JRC-GSW products that suffer from water body under-detection and misclassification,enabling intuitive visualization of water body dynamic processes.We reveal the overall water body landscape varies in a pattern characterized by main lake retreat-depression convergence under the condition of an earlier onset of the dry season in this year.This means that the Nanji Wetland's hydrological process is sensitive to seasonal water fluctuations and extreme drought events,a useful factor to the conservation planning and effectiveness evaluation of important wetlands.关键词
鄱阳湖/碟形湖/时空分布/特征识别Key words
Poyang Lake/disc-shaped lakes/spatiotemporal distribution/feature identification分类
建筑与水利引用本文复制引用
祝嘉宁,毛劲乔,田明明,张培培..鄱阳湖湿地水体高精度识别与景观格局高频率动态分析[J].水力发电学报,2026,45(5):1-15,15.基金项目
国家自然科学基金项目(52279013) （52279013）
中央高校基本科研业务费项目(B240201103) （B240201103）
