Blar i Institutt for bygg- og miljøteknikk på tidsskrift "Water"
Viser treff 1-20 av 49
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3D CFD modeling of local scouring, bed armoring and sediment deposition
(Journal article; Peer reviewed, 2017)3D numerical models are increasingly used to simulate flow, sediment transport and morphological changes of rivers. For the simulation of bedload transport, the numerical flow model is generally coupled with an empirical ... -
An analysis of the potential impact of climate change on the structural reliability of drinking water pipes in cold climate regions
(Journal article; Peer reviewed, 2018)The climate is changing worldwide. For the northern hemisphere there are distinct challenges related to climate change. It is expected that temperature on a general basis will increase within the next 100 years, and that ... -
An Assessment of Ice Effects on Indices for Hydrological Alteration in Flow Regimes
(Journal article; Peer reviewed, 2017)Preserving hydrological variability is important when developing environmental flow regimes, and a number of tools have been developed to support this process. A commonly applied method is the index of hydrological alteration ... -
Application of Three-Dimensional CFD Model to Determination of the Capacity of Existing Tyrolean Intake
(Journal article; Peer reviewed, 2024)CFD models of intakes in high-head hydropower systems are rare due to the lack of geometric data and cost of modeling. This study tests two different types of software to see how modeling can be performed in a cost-effective ... -
Assessing and Mitigating Ice-Jam Flood Hazards and Risks: A European Perspective
(Peer reviewed; Journal article, 2022)The assessment and mapping of riverine flood hazards and risks is recognized by many countries as an important tool for characterizing floods and developing flood management plans. Often, however, these management plans ... -
Assessing Visual Preferences of the Local Public for Environmental Mitigation Measures of Hydropower Impacts—Does Point-of-View Location Make a Difference?
(Peer reviewed; Journal article, 2021)Hydropower is a highly appreciated climate-friendly source of energy production. However, it has non-negligible negative impacts on the environment and landscape aesthetics where the energy is produced, affecting the ... -
Bedload Velocity and Backscattering Strength from Mobile Sediment Bed: A Laboratory Investigation Comparing Bistatic Versus Monostatic Acoustic Configuration
(Peer reviewed; Journal article, 2020)Despite the many advantages of using active ultrasound sonars, recent studies have shown that the specific acoustic geometry, signal-processing configuration, and complex surface-volume scattering process at the riverbed ... -
Combining Fish Passage and Sediment Bypassing: A Conceptual Solution for Increased Sustainability of Dams and Reservoirs
(Peer reviewed; Journal article, 2022)Sedimentation is one of the main eco-morphological and technological challenges associated with reservoirs. Sedimentation not only reduces the functional capacity of a reservoir by filling it, but also changes downstream ... -
Comparing three approaches to estimating optimum white water kayak flows in Western Norway
(Journal article; Peer reviewed, 2018)Background: Modern water management strategies aim to assess the impact of water regulation alternatives on all relevant ecosystem services, including white water (WW) recreation. Therefore it is important to estimate the ... -
A Conflict between Traditional Flood Measures and Maintaining River Ecosystems? A Case Study Based Upon the River Lærdal, Norway
(Peer reviewed; Journal article, 2021)Floods are among the most damaging of natural disasters, and flood events are expected to increase in magnitude and frequency with the effects of climate change and changes in land use. As a consequence, much focus has ... -
Data Integration for Investigating Drivers of Water Quality Variability in the Banja Reservoir Watershed
(Peer reviewed; Journal article, 2023)It is increasingly important to know the water quality of a reservoir, given the prospect of an environment poor in water reserves, which are based on intense and short-lived precipitation events. In this work, vegetation ... -
Detention and Retention Behavior of Four Extensive Green Roofs in Three Nordic Climate Zone
(Journal article; Peer reviewed, 2018)Climate change coupled with increasing urbanization has made extensive green roofs, both for retrofitting and new developments, an attractive way to bring nature back to cities, while managing stormwater. This study has ... -
Dynamic lift on an artificial static armor layer during highly unsteady open channel flow
(Journal article; Peer reviewed, 2015)The dynamic lift acting on a 100 mm × 100 mm section of a static armor layer during unsteady flow is directly measured in a series of physical experiments. The static armor layer is represented by an artificial streambed ... -
Estimation of Groundwater Depletion in Iran’s Catchments Using Well Data
(Journal article; Peer reviewed, 2022)Iran is experiencing significant water challenges that have now turned water security into a national priority. By estimating secular trend groundwater storage in Iran between 2002 and 2017, we see that there is an intensive ... -
Evaluating the structure from motion technique for measurement of bed morphology in physical model studies
(Peer reviewed; Journal article, 2021)The selection of instrumentation for data acquisition in physical model studies depends on type and resolution of data to be recorded, time frame of the model study, available instrumentation alternatives, availability of ... -
Evaluation of CYGNSS Observations for Flood Detection and Mapping during Sistan and Baluchestan Torrential Rain in 2020
(Peer reviewed; Journal article, 2020)Flood detection and produced maps play essential roles in policymaking, planning, and implementing flood management options. Remote sensing is commonly accepted as a maximum cost-effective technology to obtain detailed ... -
Experimental and Numerical Determination of the Head Loss of a Pressure Driven Flow through an Unlined Rock-Blasted Tunnel
(Peer reviewed; Journal article, 2020)The friction loss in a part of the rock-blasted unlined tunnel of the Litjfossen hydropowerplant in Norway was determined from experimental and numerical studies. Remote sensing datafrom the prototype tunnel provided the ... -
Flow Measurements Derived from Camera Footage Using an Open-Source Ecosystem
(Peer reviewed; Journal article, 2022)Sensors used for wastewater flow measurements need to be robust and are, consequently, expensive pieces of hardware that must be maintained regularly to function correctly in the hazardous environment of sewers. Remote ... -
Hydraulic Transient Impact on Surrounding Rock Mass of Unlined Pressure Tunnels
(Peer reviewed; Journal article, 2023)The frequent pressure pulsations due to hydraulic transients in hydropower plants induce cyclic loading on the rock mass that may contribute to increased instances of block falls and increased risk of tunnel collapse over ... -
Hydrological Performance of LECA-Based Roofs in Cold Climates
(Journal article; Peer reviewed, 2018)Rooftops represent a considerable part of the impervious fractions of urban environments. Detaining and retaining runoff from vegetated rooftops can be a significant contribution to reducing the effects of urbanization, ...