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根据南水北调中线总干渠初步设计工程水文计算要求 ,进行了南水北调中线总干渠交叉河流的洪水调查、分析研究工作。“96·8”洪水调查主要是针对豫北地区与总干渠交叉的 2 5条河流进行的 ,外业调查范围一般选在总干渠与河流交叉断面上下游 1～ 2km的河段上 ,主要摸清“96·8”洪水发生日期、洪痕位置、洪水过流情况以及上下游水利工程及卡口工程情况、洪水淹没范围等 ,重点对洪痕高程进行测量。着重介绍调查洪水洪峰流量计算、整编分析和调查成果的评定
According to the hydrological calculation requirements of the preliminary design of the main canal of the Middle Route of South-to-North Water Diversion Project, the flood investigation, analysis and research of the cross-river of the Middle Route of South-to-North Water Diversion Project were carried out. The “96.8” flood survey is mainly conducted for 25 rivers intersecting the main canal in the north of Henan Province. The scope of the field survey is generally selected on the sections of 1 ~ 2km upstream and downstream of the cross-section of the main canal and the river, Clear the date of “96 · 8” flood, location of flood mark, overcurrent of flood, as well as the upstream and downstream water conservancy projects and bayonet engineering conditions, flood inundation range, etc., and focus on measuring the elevation of flood mark. Focus on investigating flood peak flow calculation, reorganization analysis and evaluation of the survey results