宽浅明渠横向取水的试验研究

本文试验研究了宽浅明渠横向取水时的分流特性及泥沙在引水渠中的淤积。试验结果表明，当渠首为无闸引水时，渠道中将产生回流，进入渠道的泥沙在回流区产生严重的淤积，影响渠道的正常引水。进而提出了在渠首建闸的方案，试验研究了闸门的形式、布置方案、过流能力、闸门开度及渠道的断面形态、泵房前池形状等水力学问题和在设计高低水位时的泥沙淤积问题，并提出了相应的防淤清淤措施。试验结果表明，选定的闸门布置形式和渠道形状基本能满足引水的要求。采用高速水流搅拌冲沙的方法能有效地防止泥沙淤积。本文的研究结果对相似的工程有参考价值，并可为数学模型的验证提供试验数据。

Test Study on Transverse Diversion from Wide-shallow Open Channel

In this study, the flow characteristics and sediment deposition problems in diversion channel have been studied.Under the condition of diversion Channel without intake gate. Water diverted transversely from wide-shallow open channel results in that eddy flow occur in diversion channel, and sediment entering into the channel deposits heavily.Afterwards, test study with intake gate at the entry of the diversion channel has been conducted.The layout scheme of intake and diverison channel, intake capacity gate opening and sectional shape of those structures have ben investigated and the measures for preventing from deposition has been suggested in this report.As shown by the study results, the selected layout scheme of the intake and the channel can fundamentally meet the intake requirement. Sediment problems can be solved essentially. The measure of high pressure water jet for wasing out the deposit in channel is suggested.This study hat the referenced value for similar projects and experimental data is provided for verification of mathematical model.