Computer assisted hydraulic design of tyrolean weirs

Thesis Type: Postgraduate

Institution Of The Thesis: Orta Doğu Teknik Üniversitesi, Faculty of Engineering, Department of Civil Engineering, Turkey

Approval Date: 2015




Tyrolean weir is a type of water intake structure in which water is taken into the channel by bottom racks built on the stream bed. It is generally preferred in order to divert water to run-off river plants on mountainous regions with steep slopes where bed sediment concentration is rather high. In this study; a literature research is conducted in terms of assumptions, approaches, and different calculation methods used for designing a Tyrolean type of intake structure. Broadly accepted and tested design studies in literature are presented, practiced and compared regarding the type of approaches and assumptions made for related methods. A computer program is developed to perform design and analysis. In the design part, number of bars, their thickness, spacing and length are determined for the given design discharge to be diverted. In the analysis part of the program, flow depth over the trash rack is obtained and discharge taken into the intake channel is calculated by using stream discharge, trash rack length, bar types, and bar cross-sections as input values. An application study conducted to guide through the stages of analysis and design calculation methods.