2000-2020年鄱阳湖干湿季边界数据集

A dataset of the Poyang Lake coastlines in dry and wet seasons during 2000-2020

鄱阳湖位于江西省南部,与长江相连,是中国第一大淡水湖,丰水期面积可以达到3000 km^(2)以上,枯水期面积可低至800 km^(2)左右。作为长江干流重要的调蓄性湖泊,鄱阳湖对流域调蓄洪水、生态多样性保护及区域经济发展有重要作用。本研究基于高时间频率的MODIS数据,得到了2000-2020年鄱阳湖丰、枯水期的边界数据。分别与两期干湿季鄱阳湖水域边界的目视解译结果进行对比,得出本数据集的总体精度高于85%。本数据集反映了鄱阳湖近21年丰、枯水期的边界变化情况,可为鄱阳湖流域的生态保护和水资源管理等研究提供基础数据。

Located in the south of Jiangxi Province, Poyang Lake is China’s largest freshwater lake directly connected to the Yangtze River. In the wet seasons, the water area of the lake can reach more than 3000 km^(2) and in the dry seasons, it can drop to lower than 800 km^(2). As one of the important lakes in the mainstream of Yangtze River, it plays an important role in flood storage, biodiversity protection and the economic development of the watershed. Based on high-frequency MODIS data, we obtained series of Poyang Lake coastlines in wet and dry seasons during 2000-2020. When compared with two visual interpretation results in wet and dry seasons, the overall accuracy of this dataset is higher than 85%. This dataset can delineate the tempo-spatial dynamics of the lake inundations and can serve as scientific data for the research on ecological protection and water resource management in the watershed of Poyang Lake.