11 概论....................................................41 1．．1 1 规划范围规划范围......................................................41.21.2 规划基准年及年限规划基准年及年限 ...............................................41.31.3 规划编制依据规划编制依据 ...................................................41.41.4 规划目的、意义、指导思想和技术路线规划目的、意义、指导思想和技术路线............................61.51.5 规划编制原则规划编制原则 ...................................................71 1．．5 5 规划目标规划目标......................................................82．榕江流域自然环境概况 ...................................92.12.1 流域位置及范围流域位置及范围.................................................92.22.2 河流特征及水利工程河流特征及水利工程 ............................................102.32.3 水文气象特征水文气象特征 ..................................................15 2.3.1 气象特征..........................................................................................................................152.3.2 水文特征..........................................................................................................................182.42.4 地质、土壤植被特征地质、土壤植被特征............................................20 2.4.1 地质.................................................................................................................................202.4.2 土壤..................................................................................................................................212.4.3 植被..................................................................................................................................213．榕江流域社会经济发展与预测 ............................223.13.1 各区域的社会、经济情况简介各区域的社会、经济情况简介....................................223.2 流域经济与城镇体系发展规划....................................25 3.2.1 经济发展规划.................................................................................................................253.2.2 流域城镇体系的发展规划.............................................................................................273.33.3 社会发展现状与预测社会发展现状与预测...........................................31 3.3.1 人口分布和城市化现状...............................................................................................313.3.2 人口与城市发展的预测方法及预测结果......................................................................313.43.4 经济发展现状与预测经济发展现状与预测 ............................................32 3.4.1 经济发展现状.................................................................................................................323.4.2 经济发展预测与结果......................................................................................................354. 榕江流域水资源供需分析 ................................394.14.1 榕江流域水资源状况榕江流域水资源状况............................................3924.2 榕江流域用水现状.............................................404.3 榕江流域现状供用水分析.......................................414.4 需水预测与供水计划...........................................424.54.5 供需平衡分析与措施供需平衡分析与措施...........................................455．榕江流域水环境质量现状 ................................485 5．．1 1 水质监测与资料收集水质监测与资料收集...........................................485．2 分析方法.....................................................485．3 评价标准 ....................................................495.4 榕江流域水质现状..............................................495.5 榕江流域水质现状评价 ..........................................50 5.5.1 水质现状及污染特征......................................................................................................505.5.2 榕江流域水质时空变化特征.........................................................................................596．榕江流域水污染源现状与预测 ............................626．1 水污染源现状.................................................62 6.1.1 工业污染源现状..............................................................................................................626.1.2 生活污染源现状..............................................................................................................676．2 水污染物排放量预测...........................................696.3 面污染源预测 .................................................736.3.1 面污染源的形成机理......................................................................................................736.3.2 面污染源形成的影响因素.............................................................................................736.3.3 榕江流域面源污染负荷计算.........................................................................................757 地面水环境功能区划与容量计算 ...........................767.1 划分依据....................................................767.2 划分原则......................................................767.3 划分范围......................................................777.47.4 水环境功能的分类水环境功能的分类..............................................777.5 地面水体水环境功能区划分结果..................................787．6 水环境容量计算 ..............................................78 7．6．1 水污染控制单元的划分...........................................................................................7837.6.2 设计流量的确定与水质标准..........................................................................................817．6．3 水环境数学模型..........................。