ISLSCP II RIVER ROUTING DATA (STN-30P)

The Simulated Topological Network (STN-30p) data set provides the large-scale hydrological modeling community an accurate representation of the global river system at 0.5 degree and 1.0 degree spatial resolutions. STN-30p represents the potential connectivity of the continental land mass by assigning one of eight (E, SE, S, SW, W, NW, N, NE) possible flow directions to each continental grid cell (Jenson 1988, Band 1993). The potentiality of STN-30p reflects the fact that flow direction is assigned to every land cell regardless of the existence of actively flowing rivers. STN-30p can be viewed as a river network which would exist if sufficient surface runoff was available to form river channels everywhere. There are two data files with this data set.

模拟拓扑网络（Simulated Topological Network，STN-30p）数据集为大规模水文建模研究共同体提供了0.5度与1.0度空间分辨率下的全球河网精准表征。STN-30p通过为每个陆地区域网格单元赋予八种（东、东南、南、西南、西、西北、北、东北）可选流向之一，来表征大陆陆块的潜在连通性（Jenson 1988，Band 1993）。STN-30p的潜在属性体现为：无论活跃流动河流是否存在，所有陆地区域网格单元均会被分配流向。STN-30p可被视为一种理想河网——若全球各处均有足够地表径流形成河道，则该河网将真实存在。本数据集包含两份数据文件。