When the water has to be diverted from a turbid source having a great amount of suspended materials in it, bottom intake structures such as Coanda and Tyrolean types are preferred. To perform this task, diverted water is captured by a transversal rack, and a gallery located in the control crest is utilized. This study was motivated by a search for the best design where the quality of the diverted water can be increased by screening out most of the sediments in the flow. Current work focuses on the water capture and sediment release efficiencies of both Tyrolean and Coanda type intakes through experimental work. It complements and extends existing experimental studies by considering sediment-laden flow. We used a novel sediment feeding system designed specifically for this study in the experiments. Study results pointed out that when sediment release efficiency is considered, all types of Coanda intakes having different design parameters performed better as compared to Tyrolean intakes. Water capture and sediment release efficiencies are related to parameters used in the experiments including Coanda type, rack angle, void ratio, sediment amount, and flow rate based on the statistical analyses of these parameters. An optimum design is proposed with the maximum sediment release efficiency to prevent clogging during the operation of the intakes.

当必须将水从其中含有大量悬浮物的混浊源中分流时，优选底部吸水结构（例如柯安达和蒂罗尔类型）。为了执行此任务，转移的水由横向机架收集，并利用位于控制波峰的通道。这项研究的动机是寻求最佳设计，其中可以通过过滤掉流中的大部分沉积物来提高分流水的质量。目前的工作重点是通过实验工作来提高蒂罗尔型和柯安达型进水口的集水和沉积物释放效率。它通过考虑含沙流来补充和扩展现有的实验研究。我们在实验中使用了专门为此研究设计的新型沉积物进料系统。研究结果指出，考虑到沉积物的释放效率，具有不同设计参数的所有柯恩达进气口的性能均优于蒂罗尔进气口。根据这些参数的统计分析，集水和沉积物的释放效率与实验中使用的参数有关，包括柯恩达类型，齿条角，空隙比，沉积物量和流速。提出了具有最大沉积物释放效率的最佳设计，以防止在进水口运行期间发生堵塞。和流量基于这些参数的统计分析。提出了具有最大沉积物释放效率的最佳设计，以防止在进水口运行期间发生堵塞。和流量基于这些参数的统计分析。提出了具有最大沉积物释放效率的最佳设计，以防止在进水口运行期间发生堵塞。