该数据集包含2003-2019年江苏省十大湖泊(太湖、洪泽湖、高邮湖、骆马湖、石臼湖、滆湖、阳澄湖、白马湖、邵伯湖和淀山湖)的水位、面积和水量变化,为研究江苏省近年来的湖泊水文生态系统平衡提供了重要的参数。 十大湖泊的水位数据基于Envisat/RA-2、Cryosat-2、ICESat、ICESat-2测高卫星获得;面积数据基于Landsat TM/OLI光学影像采用改进的归一化水体指数提取。对水位数据完整的四个湖泊(洪泽湖、高邮湖、滆湖和太湖),根据水位和面积结果估算了2003-2019年的水量变化。 与实测水位对比,卫星测高获取的所有湖泊的水位都有显著的一致性(α = 0.05),平均绝对误差为0.168 m。 该数据集提供了2003-2019年江苏省十大湖泊的水位、面积和水量变化,可以为江苏省水资源的管理与调度提供数据支持。
柯长青, 常翔宇, 蔡宇, 夏文韬
本数据为祁连山地区2020年地表水体(包括液态水、冰川及多年积雪)分布产品。采用经典归一化水体指数法(Normalized Difference Water Index , NDWI)和人工修正的方法提取。原始基础数据为2020年祁连山全境的Landsat影像。参考数据为谷歌影像和哨兵2号影像。产品以shp文件格式存储,包含坐标系、水体面积等属性。产品为1期,时间分辨率为1年,空间分辨率为30米,边界精度在30米(一个像元)左右。该产品直观地反映了祁连山水体在2020年的大致分布,可用于流域水资源定量估计研究。
李佳, 李建江, 李新, 刘绍民
The Water body dataset(WBD) data is important for hydrology research, matter and energy cycle research. The inland water inventory included water bodies of tundra and boreal forest in North America. The water extent was extracted from Sentinel-2 A/B multi-spectral with assistant of JRC yearly permanent water. Both water index and random forest methods were used to detect water. The water index extracted the loose water extent. Random forest extracted the more accurate water extent. And area, perimeter and shape index (SI) were provided in this dataset. The overall accuracy is 98%. It was established that about 6.7 million water bodies presented in tundra and boreal forest in North America, among witch 6 million small water bodies less than 0.1 km2 (90% of total water bodies) were included. And the inventory covered 0.12 km2 inland water, the average size, perimeter and SI of which were 0.12 km2, 1.01 km and 1.42.
冯敏, Yijie Sui
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