Global Flood Hazard Frequency and Distribution

The Global Flood Hazard Frequency and Distribution is a 2.5 minute grid derived from a global listing of extreme flood events between 1985 and 2003 (poor or missing data in the early/mid 1990s) compiled by Dartmouth Flood Observatory and georeferenced to the nearest degree. The resultant flood frequency grid was then classified into 10 classes of approximately equal number of grid cells. The greater the grid cell value in the final data set, the higher the relative frequency of flood occurrence. This data set is the result of collaboration among the Columbia University Center for Hazards and Risk Research (CHRR) and Columbia University Center for International Earth Science Information Network (CIESIN).

全球洪水灾害频次与分布数据集，系基于1985年至2003年间（早期/中期1990年代数据质量欠佳或缺失）全球极端洪水事件的清单，由达特茅斯洪水观测站编制，并按最近一度的地理坐标进行地理配准而成。据此生成的洪水频次网格随后被划分为10个类别，每个类别包含大致相等的网格单元数量。在最终数据集中，网格单元的数值越高，洪水发生的相对频次亦越高。本数据集是哥伦比亚大学灾害与风险评估研究中心（CHRR）与哥伦比亚大学国际地球科学信息网络中心（CIESIN）合作的结果。