黄河宁夏园艺场河段河道基本处于天然状态，主流摆动频繁，水流散乱，主槽游荡不定，致使防洪、通航安全问题突出。考虑到其复杂的河道及水沙情况，通过建立二维水沙数学模型，并由实测资料验证其相似性，分别对3个方案的通航水流条件进行了计算与比较分析。结果表明：整治线主要依托主导河岸布设且在上游布置了一条洲脊顺坝以归顺河势的方案，其整治效果较优，泥沙回淤量较少，航槽相对稳定，且工程量较小，可作为该滩目前应急整治方案。%Ningxia yuanyichang is basically in the natural state. The main flow swing is frequent and the water flow is scattered. The main channel is braided reach, which results in flood control and navigation problems. Considering the complexity of the channel and the water and sediment conditions, the two⁃dimensional mathematical model of water and sediment was established and the measured data were used to verify the similarity. At the same time, the navigation flow conditions of three scenarios were calculated and analyzed. The results show that the regulation line of the first scenario is mainly based on the dominant riparian and in the upstream;an island ridge is arranged to obey the regime;the rectification effect is relatively better; siltation quantity is less; the navigation channel is relatively stable and engineering quantity is smaller. So it can be used as an emergency treatment scenario.
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