国道324线(凤南-角美段)改线工程坂头大桥防洪评价报告(报批稿)中国市政工程中南设计研究总院二0一二年一月??324??????????????2目录1概述........................................................................................................................................................................................................................................................................................................................................................42基本情况.....................................................................................................................................................................................................................................................................................................................................................................................................233河道演变.........................................................................................................................................................................................................................................................................................................254防洪评价计算.................................................................................................................................................................................................................................................................................................................................................................................................485河势分析...............................................................................................................................................................................................................526防洪综合评价..................................................................
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