Missions
Laboratory of Hydraulic Constructions (LCH)
Director : Prof. Dr. Anton Schleiss
Maintain a permanent synergy between teaching, research and services
Laboratoire de constructions hydrauliques
ÉC O LE PO L Y TEC H N IQ U E FÉ DÉRA LE D E LA USAN NE
Field of activities Hydraulic engineering of infrastructures and systems ¾ ¾ ¾ ¾
water supply systems in rural and urban areas water resources management in catchment areas hydropower schemes and dams safety of hydraulic structures in view of extreme floods and their modelling
¾ river training works, flood protection and revitalisation measures
¾ safety and optimisation of complex hydraulic schemes
¾ coastal and harbour engineering in lakes ¾ protection measures against oil spills
Laboratoire de constructions hydrauliques
ÉC O LE PO L Y TEC H N IQ U E FÉ DÉRA LE D E LA USAN NE
General line of research Research concentrates on the interactions of hydraulic structures and schemes with their environment, in particular with water air and underground. It focusses essentially on topics Reservoir sedimentation due to turbidity currents corresponding to present and future concerns of large infrastructures projects. Research is carried out by using hybrid modelling that is a combination of physical and Scouring in river bends numercial simulations.
High velocity flow over macro-roughness
Rock scour due to high velocity jet impact
Laboratoire de constructions hydrauliques
ÉC O LE PO L Y TEC H N IQ U E FÉ DÉRA LE D E LA USAN NE
Energy dissipation and hydrodynamic forces of aerated flow over macro-roughness linings for overtopped embankment dams ¾ Goal: dissipate as much as possible of the flow energy with optimal macro-roughness linings ¾ Systems tested in laboratory (30°-18° inclined flume) and by numerical-modeling:
¾ Dissipating sources : Vortices Separation zones Transverse jets
Effects of macro-roughness: Diminution of the cavitation risks Increase of the flow resistance Creation of an additional drag force ⇒ Increase of energy dissipation by 40% to 60% compared to smooth slopes Laboratoire de constructions hydrauliques
ÉC O LE PO L Y TEC H N IQ U E FÉ DÉRA LE D E LA USAN NE
Scouring by jet impact on rocky riverbeds downstream of dams and dynamic flow pressures reality
Katse Dam, Lesotho
laboratory
Physical process of scouring Fondamental research installation to analyse:
¾ Scour hole evolution ¾ Prevent dangerous erosion of dam foundation and valley side-slopes
¾ Turbulent flow in the pool ¾ Dynamic pressure at rock-water interface and propagation inside rock fissures ¾ Amplifying / damping effect of air Laboratoire de constructions hydrauliques
ÉC O LE PO L Y TEC H N IQ U E FÉ DÉRA LE D E LA USAN NE
Management of reservoir sedimentation by technical measures to influence density currents Feststoffenbeladener Sediment-laden Zufluss river inflow during während Hochwasser floods
Geschiebe Delta formed bisbedload zum Delta by
Boundary conditions Abtauchpunkt Plunging point
Schwebstoffe am Suspended sediment Seegrund at bottom
Staumauer Dam
Zufluss - Inflow Feststoffkonzentration - Sediment concentration
Stausee Reservoir
Density current Trübestrom Vorfluter Erodierbare Ablagerungen Erodable deposits
Feststoffmangel
Density currents are the main process of sediment transport in reservoirs
Zeit Time
Deposits
Erosion
Maps of erosion and deposits Bottom interaction
Research of technical measures by the help of physical and numerical modeling
Laboratoire de constructions hydrauliques
ÉC O LE PO L Y TEC H N IQ U E FÉ DÉRA LE D E LA USAN NE
Teaching Graduate courses (Master) • Hydraulic structures • Dams and appurtenant structures • Urban hydraulic systems • Flood protection measures and river training works • Contracts and construction law • Hydraulic and energy networks • Water and energy economics • River morphology • Surface water management
Undergraduate courses (Batchelor) • Hydraulics of structures • Infrastructures and landscape planning Laboratoire de constructions hydrauliques
ÉC O LE PO L Y TEC H N IQ U E FÉ DÉRA LE D E LA USAN NE
Services Staff: 20 to 30 persons
State-of-the-art equipment
Hall of 500 m2 allocated to scale model testing (research and services)
Laboratoire de constructions hydrauliques
ÉC O LE PO L Y TEC H N IQ U E FÉ DÉRA LE D E LA USAN NE
Postgraduate studies in hydraulic schemes Participants 1999-2001: 2001-2003: 2003-2005:
26, 15 Swiss, 11 international students from 11 countries 24, 11 Swiss, 13 international students from 9 countries 21, 7 Swiss, 14 international students from 10 countries
Laboratoire de constructions hydrauliques
ÉC O LE PO L Y TEC H N IQ U E FÉ DÉRA LE D E LA USAN NE