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| GCIV0026-1 | Applied Hydraulics I | |||||
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| Duration : | 35h Th, 35h Pr | |||||
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| Credits/ECTS : |
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| Holder(s) : | Michel Pirotton | |||||
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| Course contents : | This class, which fits into the continuity of the other classes of fluids mechanics and hydraulic constructions proposed to the civil engineers students, treats the problems of free surface steady flows in the broad sense, by studying the route of the drop of water who touch the soil until its arrival to the sea.It is made of lectures consisting of a theoretical part (ex-cathedra) and a practical one. This last is a supervised exercise that leads to the handling in of an individual report at the end of the lecture or for the next one. In the last case, students randomly chosen are invited to present clearly, in front of the group, the submitted problem as well as the resolution method they used and their results.The subjects treated are as follow, with the numbers of the concerned chapters in the lecture notes: 1 - Hydrology (Chap. II - Elements of hydrology - Runoff elementary theory - Evaluation of the terms of the hydrologic balance)Calculation of flood hydrograms in a hydrographic catchment using the isochrones method - Influence of the rain intensity and duration as well as the soil occupation on the shape of the hydrogram at the exit. 2 - Estimation of the flood discharges (Chap. II - Elements of hydrology - Practical methods for the flood discharges estimation)Application of the most common statistical methods for flood discharges estimation - Discussion on the disparity of the results and on the practical design of evacuation structures. 3 - Uniform height and critical height (Chap. III, VII & VIII - Basic equations of hydraulics - Simplified models and characteristic flows - Determination of roughness losses) Uniform movement, roughness empirical formulae, roughness modern formulation... Introduction to the notion of uniform height and calculation of its value from several expressions of roughness laws - Discussion on the predominance of the roughness in free surface hydraulics. 4 - Isoclines method (Chap. III, V, VI & VII - Basic equations of hydraulics - Equations integrated over the water height - Unidimensionnal equations integrated over the cross section - Simplified models and characteristic flows) Waterlines equations, calculation of the waterlines using the isoclines method, critical regime, uniform movement, study of the different types of waterlines, flow modes... Drawing of the waterlines in a channel using the isoclines method - Discussion on the management of regulated rivers - Application to the Meuse. 5 - Waterlines in a river network Calculation of the waterlines in a network and test of the influence of the boundary conditions - Application to a reach of the river Meuse Liégeoise (+ Derivation, Ourthe, Albert canal ) - Discussion about the building of the Fétinne mole. 6 - Waterlines in a natural river Calculation of a waterline in a natural river (use of height - section - wet perimeter tabulated relations) - Discussion about the cross section ideal shapes from a hydraulic or ecological point of view. 7 - Waterlines with a change in flow regime (Chap. III, V, VI & VII - Simplified models and characteristics flows) Critical regime, uniform movement, hydraulic jump.Calculation of the waterline in a channel with transition between sub to super critical flow and emergence of a hydraulic jump - Visit of the laboratory with hydraulic jumps observation - Discussion about the practical importance of the hydraulic jump for energy dissipation downstream of structures. 8 - Under pressures (Chap. XIV - Underground hydraulics - The under pressures, internal erosion) Calculation of the pressures under a hydraulic structure by empirical Blighs method and by the theory of the velocity potential flows - Comparison of the 2 methods - Discussion about the importance of the boundary conditions and of a well-posed problem. 9 - Underground flows (Chap. XIV - Underground hydraulics - Flow in porous media, application of the theory of velocity potential flows) Estimation of the free surface location in a permeable earth dam by the theory of velocity potential flows. | |||||
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| Course objective : | The main goal of this class is, while carrying out a continuity and close links with the other lectures of fluid mechanics and hydraulic constructions given to civil engineer students, to treat in an unified and critical way the aspects of hydrology and free surface hydrodynamics and to avoid traditional continuous-discontinuous separation of surface hydraulics. In addition to ex-cathedra lectures supplying the essential theory and basic equations, these goals are achieved through practical and directed reflexion works, based on real-cases, as well as through laboratory and on site visits.Attractive and exhaustive lecture notes judiciously completed the informations given during lectures, and a forum of questions allowed a quickly and easy contact between teacher and students (http://www.ulg.ac.be/hach). | |||||
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| Organization : | The class is given during first semester on Friday morning (exceptionally on Tuesday morning for 2004-2005 academic year) and during second semester on Thursday afternoon for 5 weeks. | |||||
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| Written notes : | Comprehensive typing out lecture notes (814 pages) available. | |||||
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| Assessment : | Each practical work report provides an individual appreciation.A written test, without exemption effect, about theoretical and practical matters yet treated is scheduled to the middle of the first semester.A written evaluation for the whole lecture is scheduled during June or September examination session. It is made up of a theoretical and an application part. The first one is with closed books, the others one with open books.Final mark is obtained by weighted mixing of the partial appreciations. | |||||
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| Contacts : | Michel Pirotton Hydrodynamique Appliquée et Constructions Hydrauliques (HACH) Chemin des Chevreuils, 1 Bât. B52/3+1 4000 Liège 1 Tél. : 04/366.95.36 - email: Michel.Pirotton@ulg.ac.be http://www.ulg.ac.be/hach | |||||
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ULg : Students and Studies Administration - Academic Affairs
Contact : Monique Marcourt, direction A.E.E.
Date of data : 27/02/2006
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