目 录1.总论.............................................................................................................21.1.评价目的..............................................................................................21.2.评价依据..............................................................................................21.3.评价预测年限、评价等级及评价范围..............................................31.4.评价标准..............................................................................................41.5.评价因子及环境保护目标..................................................................52.工程分析.....................................................................................................82.1.项目概况..............................................................................................82.2.路线走向及主要控制点......................................................................82.3.建设规模及主要技术指标..................................................................82.4.主要工程量........................................................................................102.5.材料来源与运输................................................................................122.6.交通量预测........................................................................................132.7.投资估算............................................................................................162.8.工期安排及工程进度........................................................................162.9.工程污染源分析................................................................................163.区域环境概况...........................................................................................193.1.自然环境............................................................................................193.2.生态环境............................................................................................273.3.社会环境.................................