ROR Areas with Potential Significant Flood Risk EU2018 lines (Flood Risk Directive) RWS

Areas with Potential Significant Flood Risk in the Netherlands contains the designated areas in the report 'Flood Risks in the Netherlands, 2018. Preliminary flood risk assessment and designation of potentially significant flood risk areas under the European Flood Risks Directive (ROR) 2nd cycle: 2016-2021. The areas are identified on the basis of the following principles: Areas shall be distinguished according to the four separate river basin districts; Areas are divided into four types (A, B, C, D) of floods reflecting the difference in protection, as well as the diversity of responsibilities and roles of relevant authorities; The boundaries of the areas are based on the extreme limits of the potentially floodable area, as determined on the basis of simulations from the national flood database. For the primary flood defences, the area has been supplemented to the high ground line. The Rijkskanaaldijken are part of the designated areas. In total, 14 GPSOR are awarded in the Netherlands. Areas of Type D are not present in the Eems and Scheldt river basins. There are areas that can flood both from the main water system (B) and the regional water system (C).“荷兰潜在重大洪水风险区域”数据集收录了《2018年荷兰洪水风险：欧洲洪水风险指令（ROR）第二轮周期（2016-2021年）下的初步洪水风险评估及潜在重大洪水风险区域划定》报告中指定的相关区域。该类区域的划定遵循以下原则：一是依据四个独立的流域分区进行划分；二是根据防洪防护等级差异、相关主管部门的职责与角色多样性，将区域划分为A、B、C、D四类洪水风险区；三是区域边界以国家洪水数据库模拟得出的潜在淹没区域极端边界为基准，针对一级防洪设施，区域范围已拓展至高地边界。国家运河堤防（Rijkskanaaldijken）已被纳入划定区域范畴。荷兰境内共计划定14个GPSOR区域。埃姆斯河与斯海尔德河流域内不存在D类风险区。部分区域既可能受主干水系（B类）影响引发洪水，也可能受区域水系（C类）影响引发洪水。