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Article
Statistical accuracy for estimations of large wood blockage in a reservoir environment
The blockage of weirs or bridges by in-stream wood can reduce the flood discharge capacity, leading to hazardous situations. To assess the related risk, blocking probabilities quantifications are needed. Howev...
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Article
Influence of collars on reduction in scour depth at two piers in a tandem configuration
Bridge failure, due to local scour at bridge pier foundations, has become a critical issue in river and bridge engineering, which might lead to transportation disruption, loss of lives and economic problems. A...
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Chapter and Conference Paper
Failure of Saddle Dam, Xe-Pian Xe-Namnoy Project: Executive Summary
The Saddle Dam D at the Hydroelectric Power project Xe-Pian Xe-Namnoy in the Lao People’s Democratic Republic failed on July 23, 2018. An Independent Expert Panel (IEP) was established to investigate into and...
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Article
A risk-based multi-level stress test methodology: application to six critical non-nuclear infrastructures in Europe
Recent natural disasters that seriously affected critical infrastructure (CI) with significant socio-economic losses and impact revealed the need for the development of reliable methodologies for vulnerability...
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Article
Open AccessSediment replenishment combined with an artificial flood improves river habitats downstream of a dam
River reaches downstream dams where a constant residual flow discharge is imposed, often lack sediment supply and periodic inundation due to the absence of natural flood events. In this study, a two-year retur...
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Article
Swiss Rainfall Mass Curves and their Influence on Extreme Flood Simulation
Extreme flood estimates for dam safety are routinely obtained from hydrologic simulations driven by selected design storms. The temporal structure of such design storms can be obtained from Rainfall Mass Curve...
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Chapter and Conference Paper
Hybrid Modelling Approach to Study Scour Potential at Chancy-Pougny Dam Stilling Basin
Chancy-Pougny is a run-of-river dam on the Swiss–French border constructed in the early 1920s. Since its inauguration, the operation of the four spillway gates was responsible for a progressive erosion of the ...
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Article
Towards Safer Data-Driven Forecasting of Extreme Streamflows
Predicting extreme events is one of the major goals of streamflow forecasting, but models that are reliable under such conditions are hard to come by. This stems in part from the fact that, in many cases, cali...
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Article
Probabilistic failure analysis of riprap as riverbank protection under flood uncertainties
Existing riverbank riprap could face the risk of failure if the flood regime changes in future. Additionally, changed sediment transport in rivers, as a possible result of climate change, impacts the failure r...
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Article
New lakes in deglaciating high-mountain regions – opportunities and risks
In connection with the ongoing disappearance of glaciers in cold mountains, a great number of new lakes come into existence. The sites and approximate formation time of such potential new lakes can be realisti...
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Article
Stresses and Displacements in Steel-Lined Pressure Tunnels and Shafts in Anisotropic Rock Under Quasi-Static Internal Water Pressure
Steel-lined pressure tunnels and shafts are constructed to convey water from reservoirs to hydroelectric power plants. They are multilayer structures made of a steel liner, a cracked backfill concrete layer, a...
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Article
Simulated Annealing in Optimization of Energy Production in a Water Supply Network
In water supply systems, the potential exists for micro-hydropower that uses the pressure excess in the networks to produce electricity. However, because urban drinking water networks are complex systems in wh...
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Article
Influence of jet aeration on pressures around a block embedded in a plunge pool bottom
The influence of the air entrained by water jets on the dynamic pressures applied on the bottom of a plunge pool and inside underlying fissures was analyzed with systematic experiments. The large experimental ...
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Article
Investigation of turbulence flow and sediment entrainment around a bridge pier
Local scour around the obstacles such as bridge pier is the result of complex interaction between turbulent flow and sediment particles at the mobile bed. The entrainment of sediment particles from the bed is ...
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Article
The hydro-morphological index of diversity: a tool for describing habitat heterogeneity in river engineering projects
We present a new hydro-morphological index of diversity (HMID), a tool aimed for use in river engineering projects and firstly developed at gravel-bed streams in Switzerland, but intended for a broader use. We...
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Article
Design of Pressure Relief Valves for Protection of Steel-Lined Pressure Shafts and Tunnels Against Buckling During Emptying
Using high-strength steels for pressure shafts and tunnel liners and taking into account significant rock mass participation allows the design of comparatively thin steel liners in hydropower projects. Neverth...
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Article
Alternative depth-averaged models for gravity currents and free shear flows
Two approaches have traditionally been used to describe the widening rate of jets and plumes: the diffusion concept of Prandtl, and the entrainment principle of Morton, Taylor and Turner. The entrainment conce...
