目录1概述................................................................................................11.1项目背景.................................................................................11.2评价依据.................................................................................11.2.1法律依据...........................................................................21.2.2标准规范...........................................................................21.2.3基础资料...........................................................................21.3技术路线及工作内容.................................................22基本情况......................................................................................42.1建设项目概况....................................................................42.1.1工程设计方案..............................................................42.1.2工程施工方案..............................................................52.2河道基本情况....................................................................62.2.1河道概况...........................................................................62.2.2气象水文特征..............................................................62.2.3地形、地貌、地质情况....................................72.3河段防洪标准.................................................................122.4现有水利工程及其它设施情况...................122.5水利规划及实施安排.............................................123河道演变...................................................................................133.1河道历史演变.................................................................133.2河道近期演变分析....................................................133.3河道演变趋势分析....................................................154防洪评价计算.......................................................................174.1设计洪水..............................................................................174.1.1流域概况........................................................................174.1.2水文站及基本资料.............................................184.1.3工程设计洪水标准.............................................184.1.4设计洪水........................................................................194.1.5施工分期设计洪水.............................................214.2壅水分析计算.................................................................224.2.2防护堤高程复核....................................................274.3冲刷与淤积分析计算..........................................284.3.1冲刷分析计算...........................................................284.3.2淤积分析........................................................................294.4河势影响分析..............................................................295防洪综合评价....................................................................315.1与现有水利规划的关系及影响分析...315.2与现有防洪标准、有关技术要求和管理要求的适应性分析...........................................................315.3对行洪安全影响评价..........................................315.4对河势稳定的影响分析.......................................325.5对现有防洪工程、河道整治工程及其它水利工程及设施影响分析.......................................325.5.1对工程建设区河段的影响................
