PAGEIII目录TOC\o"1-2"\h\z\uHYPERLINK\l"_Toc257300673"前言PAGEREF_Toc257300673\h1HYPERLINK\l"_Toc257300674"1．总论PAGEREF_Toc257300674\h1HYPERLINK\l"_Toc257300675"1.1项目概况PAGEREF_Toc257300675\h1HYPERLINK\l"_Toc257300676"1.2项目编制原则、依据和范围PAGEREF_Toc257300676\h2HYPERLINK\l"_Toc257300677"1.3主要结论及建议PAGEREF_Toc257300677\h4HYPERLINK\l"_Toc257300678"1.4主要工程特性表PAGEREF_Toc257300678\h5HYPERLINK\l"_Toc257300679"2．梁滩河流域沙坪坝段概况PAGEREF_Toc257300679\h7HYPERLINK\l"_Toc257300680"2.1流域自然概况PAGEREF_Toc257300680\h7HYPERLINK\l"_Toc257300681"2.2社会经济现状和发展规划PAGEREF_Toc257300681\h11HYPERLINK\l"_Toc257300682"2.3污染现状及主要问题PAGEREF_Toc257300682\h12HYPERLINK\l"_Toc257300683"2.4防洪现状及主要问题PAGEREF_Toc257300683\h14HYPERLINK\l"_Toc257300684"3．项目建设的必要性PAGEREF_Toc257300684\h15HYPERLINK\l"_Toc257300685"4．治理目标与建设规模PAGEREF_Toc257300685\h17HYPERLINK\l"_Toc257300686"4.1治理目标PAGEREF_Toc257300686\h17HYPERLINK\l"_Toc257300687"4.2治理范围PAGEREF_Toc257300687\h17HYPERLINK\l"_Toc257300688"4.3建设规模PAGEREF_Toc257300688\h17HYPERLINK\l"_Toc257300689"5．陈家桥分洪渠工程PAGEREF_Toc257300689\h19HYPERLINK\l"_Toc257300690"5.1水文PAGEREF_Toc257300690\h19HYPERLINK\l"_Toc257300691"5.2工程地质PAGEREF_Toc257300691\h29HYPERLINK\l"_Toc257300692"5.3工程任务PAGEREF_Toc257300692\h36HYPERLINK\l"_Toc257300693"5.4工程规模PAGEREF_Toc257300693\h36HYPERLINK\l"_Toc257300694"5.5设计依据PAGEREF_Toc257300694\h37HYPERLINK\l"_Toc257300695"5.6工程布置及主要建筑物PAGEREF_Toc257300695\h41HYPERLINK\l"_Toc257300696"5.7工程设计PAGEREF_Toc257300696\h42HYPERLINK\l"_Toc257300697"6．河道清淤工程PAGEREF_Toc257300697\h50HYPERLINK\l"_Toc257300698"6.1河道淤泥特性PAGEREF_Toc257300698\h50HYPERLINK\l"_Toc257300699"6.2河道清淤原则PAGEREF_Toc257300699\h52HYPERLINK\l"_Toc257300700"6.3河道清淤范围PAGEREF_Toc257300700\h52HYPERLINK\l"_Toc257300701"6.4河道清淤断面设计PAGEREF_Toc257300701\h52HYPERLINK\l"_Toc257300702"6.