【摘要】 黄河流域是我国重要的生态屏障，其生态环境脆弱，水土流失严重，水文地貌要素分析对该区域水土保持和生态环境保护具有重要的作用。本数据集以ALOS 12.5 m DEM数据为基础，通过对该DEM进行初步处理和水分分析计算得到黄河流域12.5 m分辨率的流向、汇流面积、流水线长度和河流网络4项水文分析因子数据。本数据集与不同分辨率的同期数据产品相比较，与真实河网吻合度较高，数据质量较好。本数据集可应用于流域水文、土壤水分、土壤侵蚀等方面的研究。更多还原

【Abstract】 As an important ecological barrier in China, the Yellow River Basin is characterized by fragile ecological environment and serious soil erosion. The hydrological analysis plays an important role in soil and water conservation and ecological environment protection in this area. This dataset contains four factors for hydrological analysis, namely flow direction, flow length and stream network. The data are sourced from the ALOS 12.5 m DEMs, which were then processed through preprocessing, framing, projection, mosaic and hydrological analysis and calculation. Compared with data products of the same period with different resolutions, this dataset is characteristic of better data quality and higher consistency with the real stream network. It can be applied to the study on watershed hydrology, soil moisture and soil erosion, etc.更多还原