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Journal of Irrigation and Drainage Engineering, ISSN 0733-9437, 03/2013, Volume 139, Issue 3, pp. 246 - 253
AbstractA piano key (PK) weir is a type of nonlinear (labyrinth-type) control structure with a relatively small spillway footprint. No standard PK weir design... 
Technical Papers | Piano key weir | Nonlinear weir | Labyrinth weir | DESIGN | ENGINEERING, CIVIL | AGRICULTURAL ENGINEERING | WATER RESOURCES
Journal Article
2011, ISBN 9780415682824, xv, 297
Book
Journal of Hydraulic Engineering, ISSN 0733-9429, 11/2016, Volume 142, Issue 11, p. 4016043
AbstractIn parallel to their most frequent application as an auxiliary dam spillway, piano key weirs (PKWs) are also installed on low-head barrages in... 
Technical Papers | Piano key weir | Dam | Riverbed | Scour | BED | ENGINEERING, CIVIL | JET SCOUR | WATER RESOURCES | EROSION | ENGINEERING, MECHANICAL | Slopes | Pianos | Computational fluid dynamics | Weirs | Hydraulics | Hydraulic engineering | Scouring | Ridges
Journal Article
Journal of Hydraulic Engineering, ISSN 0733-9429, 12/2018, Volume 144, Issue 12, p. 4018075
Journal Article
Journal of Hydraulic Engineering, ISSN 0733-9429, 04/2012, Volume 138, Issue 4, pp. 358 - 361
AbstractThe piano key or PK weir represents a relatively new hydraulic structure in both research and practice. There is currently a limited understanding... 
Technical Notes | Technical Note | Piano key weir | Rectangular labyrinth weir | Weir discharge efficiency | WATER RESOURCES | ENGINEERING, CIVIL | ENGINEERING, MECHANICAL | Dams | Hydraulic measurements | Properties | Comparative analysis | United States | Design engineering | Pianos | Computational fluid dynamics | Weirs | Hydraulics | Fluid flow | Labyrinth | Inlets
Journal Article
Sadhana, ISSN 0256-2499, 10/2015, Volume 40, Issue 7, pp. 2253 - 2261
This paper presents fundamental outcomes from an experimental study on the hydrodynamic performance near inlet key of Piano Key Weir (PKW). Hydrodynamic... 
Engineering | Piano Key Weir | hydrodynamic | Engineering, general | river | turbulence | LDV | ENGINEERING, MULTIDISCIPLINARY | TURBULENT STRUCTURE | DOPPLER-VELOCIMETER | Water | Turbulence | Aquatic resources | Management | Fluid dynamics | Turbulent flow | Pianos | Sand | Fluid flow | Hydrodynamics | Inlets
Journal Article
Journal of Hydraulic Engineering, ISSN 0733-9429, 08/2019, Volume 145, Issue 8, p. 4019029
AbstractPiano key weirs (PKWs) are a weir type characterized by an effective rating curve. Accordingly, this control structure is primarily applied at dams to... 
Technical Papers | Piano key weir | TRANSPORT | DESIGN | ENGINEERING, CIVIL | Rating curve | Sediment passage | WATER RESOURCES | Riverbed | Scour | ENGINEERING, MECHANICAL | Sediment deposits | Model testing | Accretion | Soil erosion | Weirs | Waterways | Spillways | Upstream | Backwaters | Mechanical devices | Rivers | Sediments | Hydroelectric power | Equilibrium | Sediment transport | Soil testing | River beds | Spillway capacity | Aggradation | Configurations | Erosion
Journal Article
Journal of Hydraulic Research, ISSN 0022-1686, 11/2016, Volume 54, Issue 6, pp. 692 - 698
With inertia and gravity representing the dominant forces for most open channel flow applications (e.g. weir flow), Froude similitude is commonly used for... 
viscous effects | scale effects | Physical modelling | Weber number | surface tension | piano key weir | DESIGN | ENGINEERING, CIVIL | WATER RESOURCES | FLOW | Piano | Efficiency
Journal Article
Journal of Hydraulic Research, ISSN 0022-1686, 08/2012, Volume 50, Issue 4, pp. 400 - 408
Piano Key Weirs (PKWs) are an alternative to linear overflow structures, increasing the unit discharge for similar heads and spillway widths. Thus, they allow... 
discharge | spillway | Capacity | Piano Key Weir | flood | ENGINEERING, CIVIL | WATER RESOURCES | FLOW | Studies | Models
Journal Article
Journal of Hydraulic Engineering, ISSN 0733-9429, 02/2012, Volume 138, Issue 2, pp. 199 - 203
In recent years, spillway rehabilitation has increased in importance and become the subject of many projects worldwide. One solution for this problem is the... 
TECHNICAL NOTES | Dam rehabilitation | Spillway capacity | Piano key weirs | Labyrinth spillways | DESIGN | ENGINEERING, CIVIL | WATER RESOURCES | ENGINEERING, MECHANICAL | Hydrofoil boats | Dams | United States | Mechanical properties | Hydrodynamics | Hydraulic measurements | Research | Pianos | Fluid dynamics | Hydraulics | Spillways | Preliminary designs | Fluid flow | Labyrinth | Discharge
Journal Article
Journal of Hydraulic Research, ISSN 0022-1686, 06/2011, Volume 49, Issue 3, pp. 359 - 366
The Piano Key Weir is a type of labyrinth weir using overhangs to reduce the footprint of the foundation. These are directly placed on a dam crest. Together... 
streamline | Free surface flow | pressure distribution | velocity distribution | Piano Key Weir | physical model | DESIGN | ENGINEERING, CIVIL | WATER RESOURCES | Studies | Pressure distribution | Dams | Pianos | Computational fluid dynamics | Labyrinth | Upstream | Footprints | Flow characteristics | Overhang | Rehabilitation
Journal Article
Journal of Hydraulic Engineering, ISSN 0733-9429, 07/2012, Volume 138, Issue 7, pp. 661 - 666
AbstractWeir submergence can influence head-discharge relationships for weirs used in channel applications when high tailwater conditions exist owing to a... 
Technical Notes | Technical Note | Piano key weir | Submerged head-discharge relationship | Labyrinth weir | Non-linear weir | Weir submergence | ENGINEERING, CIVIL | WATER RESOURCES | ENGINEERING, MECHANICAL
Journal Article
Journal of Hydraulic Engineering, ISSN 0733-9429, 02/2020, Volume 146, Issue 2, p. 4019056
AbstractUsing similitude relationships, laboratory-scale models have been used for decades to predict and confirm prototype hydraulic structure performance.... 
Technical Papers | ENGINEERING, CIVIL | Piano-key weir | WATER RESOURCES | Labyrinth weir | Scale effects | Hydraulic modeling | ENGINEERING, MECHANICAL | Head | Scale models | Weirs | Size | Head flow | Upstream | Labyrinth | Froude number | Discharge | Ratios | Prototypes | Hydraulic structures | Inertia | Gravity
Journal Article
Journal of Hydro-Environment Research, ISSN 1570-6443, 03/2018, Volume 19, pp. 160 - 167
Currently, many existing spillways located throughout the globe require rehabilitation due to dam safety issues. Consequently, there is an increasing need for... 
Piano Key weirs | Computational fluid dynamics | Hydraulic design | RANS k-ε | Spillways | Discharge estimation | Dam safety | LES | HYDRAULIC ENGINEERING MODELS | DESIGN | WATER RESOURCES | RANS k-epsilon | ENVIRONMENTAL SCIENCES | ENGINEERING, CIVIL | TURBULENCE
Journal Article
Journal of Irrigation and Drainage Engineering, ISSN 0733-9437, 08/2012, Volume 138, Issue 8, pp. 773 - 776
AbstractThe piano key (PK) weir is a relatively new nonlinear weir geometry that can be used to increase spillway discharge capacity over linear weir... 
Technical Notes | Technical Note | Piano key weir | Weir discharge coefficient | Head-discharge relationship | Approach flow | ENGINEERING, CIVIL | AGRICULTURAL ENGINEERING | WATER RESOURCES
Journal Article
Flow Measurement and Instrumentation, ISSN 0955-5986, 08/2019, Volume 68, p. 101577
In present scenario, Piano key weir has played a vital role in increasing the discharge capacity of the available dams. This modified weir is the replacement... 
Piano key weir | Statistical perusal | Discharge equation | Conventional labyrinth weir | CAPACITY | INSTRUMENTS & INSTRUMENTATION | LONGITUDINAL DISPERSION COEFFICIENT | FLOW | ENGINEERING, MECHANICAL | PREDICTION
Journal Article
Flow Measurement and Instrumentation, ISSN 0955-5986, 08/2019, Volume 68, p. 101576
Piano key weirs are high performance labyrinth weirs particularly at lower heads (water height over the weir). These weirs are considered a recent development... 
Discharge coefficient | Trapezoidal piano key weir | DESIGN | INSTRUMENTS & INSTRUMENTATION | RESONANCE | FREE-SURFACE WAVES | FLOW | ENGINEERING, MECHANICAL
Journal Article
Journal of Irrigation and Drainage Engineering, ISSN 0733-9437, 06/2013, Volume 139, Issue 6, pp. 506 - 511
AbstractThe piano key weir is a cost-effective solution for rehabilitation as well as for new dam projects with a high level of constraints (e.g., limited... 
Technical Notes | Technical Note | Piano key weir | Parapet wall | Hydraulic structure | Experimental | Spillway | ENGINEERING, CIVIL | AGRICULTURAL ENGINEERING | WATER RESOURCES | Dams | Research | Design and construction | Management | Project management | Industrial project management
Journal Article
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