Browsing Institutt for bygg- og miljøteknikk by Author "Aberle, Jochen"
Now showing items 1-20 of 23
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An experimental investigation on the flow resistance over a porous gravel-bed surface and its non-porous counterpart
Navaratnam, Christy Ushanth; Aberle, Jochen; Qin, Jie; Henry, Pierre-Yves T (Journal article; Peer reviewed, 2018)This paper presents preliminary results from laboratory experiments which were specifically designed to determine the flow resistance over a water-worked gravel-bed and its impermeable counterpart (cast-bed). The technique ... -
Beyond equilibrium: Re-evaluating physical modelling of fluvial systems to represent climate changes
Baynes, Edwin R.C.; van de Lageweg, Wietse I.; McLelland, Stuart J.; Parsons, Daniel R.; Aberle, Jochen; Dijkstra, Jasper; Henry, Pierre-Yves T; Rice, Stephen P.; Thom, Moritz; Moulin, Frederic (Journal article; Peer reviewed, 2018)The interactions between water, sediment and biology in fluvial systems are complex and driven by multiple forcing mechanisms across a range of spatial and temporal scales. In a changing climate, some meteorological drivers ... -
Comparison of the hydraulic capacity of different culvert inlet designs under sediment transport conditions
Terlaky, Fanni (Master thesis, 2015)Abstract Culverts are important hydraulic structures whose main purpose is to safely convey water through infrastructures crossing streams (e.g. roads). Several design guidelines exist for clear water conditions, but none ... -
Displacements as failure origin of placed riprap on steep slopes
Hiller, Priska Helene; Aberle, Jochen; Lia, Leif (Journal article; Peer reviewed, 2017)This paper presents results from a scale model study related to the stability of dumped and placed riprap on steep slopes of 1:1.5 (vertical: horizontal) exposed to overtopping. The experiments showed that small rearrangements ... -
Ecosystem restoration at Fundu Mare Island in the Inner Danube Delta near Braila (Romania) - Hydrodynamic optimisation
Brückner, Muriel Zazie Madeleine (Master thesis, 2016)Within the last century, the extensive implementation of engineering measures in European rivers has caused significant changes in river hydrology, water quality and local ecology, inducing major impact on the environment ... -
Experimental and Numerical Determination of the Head Loss of a Pressure Driven Flow through an Unlined Rock-Blasted Tunnel
Aberle, Jochen; Henry, Pierre-Yves T; Kleischmann, Fabian; Navaratnam, Christy Ushanth; Vold, Mari; Eikenberg, Ralph; Olsen, Nils Reidar Bøe (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 ... -
Experimental hydraulics on fish-friendly trash-racks: an ecological approach
Szabo-Meszaros, Marcell; Navaratnam, Christy Ushanth; Aberle, Jochen; Silva, Ana T.; Forseth, Torbjørn; Calles, Olle; Fjeldstad, Hans-Petter; Alfredsen, Knut (Journal article; Peer reviewed, 2018)The obstruction of fish migratory routes by hydroelectric facilities is worldwide one of the major threats to freshwater fishes. During downstream migration, fish may be injured or killed on the trash-racks or in the ... -
Field and model tests of riprap on steep slopes exposed to overtopping
Hiller, Priska Helene; Lia, Leif; Aberle, Jochen (Journal article; Peer reviewed, 2018)The comparability of large-scale field tests of dumped and placed riprap with a stone diameter of 0.37 m and corresponding model tests in a scale of 1:6.5 was investigated in terms of stability, packing density and visually ... -
H-rista som et fiskevennlig inntak
Wigestrand, Mari (Master thesis, 2014)I denne masteroppgaven er det sett på den nyutviklede inntakskonstruksjonen for småkraftverk, H-rista, og de hydrauliske forholdene knyttet til nedvandring av fisk. Oppgaven er knyttet til laboratorietester som er blitt ... -
Head losses and flow field at trash racks
Øvregård, Eirik Bruvik (Master thesis, 2016)The purpose of this master thesis was to measure the head loss caused by fish-friendly trash racks in an open water channel and to measure the turbulent flow field around its bars. Angled model trash racks with different ... -
Hydraulic physical model production with Computer Numerically Controlled (CNC) manufacturing techniques
Henry, Pierre-Yves T; Aberle, Jochen; Navaratnam, Christy Ushanth; Ruther, Nils (Journal article; Peer reviewed, 2018)Physical models are a well-accepted tool in hydraulic engineering, allowing for the detailed characterisation of flow processes and the validation of structure designs with complex boundary conditions. The methods used to ... -
Hydraulic scale modelling of the rating curve for a gauging station with challenging geometry
Pedersen, Øyvind; Aberle, Jochen; Ruther, Nils (Peer reviewed; Journal article, 2019)Direct discharge measurements during flood events can be challenging from a technical as well as from a safety point of view. Therefore, flood discharges are often estimated by extrapolating a rating curve. Extrapolations ... -
Hydraulisk utforming av nedløp fra gateavrenning
Aas, Henrik Svaland (Master thesis, 2015)I denne masteroppgaven er det sett på hvordan den hydrauliske kapasiteten til forskjellige rister varierer med hensyn på helning, vannføring i vegbanen, ristutforming og størrelse. Det er sett på hvordan kapasiteten beregnes ... -
Hydrologic and metal removal potential of filtering swales for stormwater control in cold climates
Monrabal-Martinez, Carlos (Doctoral theses at NTNU;2018:37, Doctoral thesis, 2018)Runoff from urban areas carries a wide range of pollutants both particle-bound and dissolved. Dissolved pollutants are generally more mobile and bioavailable as well as more difficult to remove by conventional infiltration ... -
Influence of Gravel-Bed Porosity and Grain Orientation on Bulk Flow Resistance
Navaratnam, Christy Ushanth; Aberle, Jochen; Qin, Jie; Henry, Pierre-Yves T (Journal article; Peer reviewed, 2018)This paper presents results from experiments that were carried out to study the effect of porosity and grain orientation on flow resistance. Experiments were performed over three rough surfaces; a water-worked gravel-bed, ... -
Modelling complex rating curves with hydraulic scale models and computational fluid dynamics
Pedersen, Øyvind (Doctoral theses at NTNU;2018:220, Doctoral thesis, 2018)The Flom-Q research project aims to revise the framework for flood-estimation methods in Norway. Accurate rating curves are important for estimating flood discharges that are crucial input for any flood assessment task. ... -
Plastring av fyllingsdammer - forskyving i plastring og anvendelse av Smartstone sensorer
Jakobsen, Jens (Master thesis, 2015)I denne oppgaven er det gjennomført modellforsøk på nedstrøms skråningsvern på fyllingsdammer. Nedstrøms skråningsvern blir i dag utført som plastring, det vil si at en og en stein plasseres på en slik måte at de ligger ... -
Reservoir Sedimentation Study for the Bunakha Hydro-electric Project
Duba, Choten (Master thesis, 2016)This thesis presents a study on the sedimentation of the reservoir of the Bunakha Hydro-electric Project in Bhutan. Although the Detailed Project Report for this peaking reservoir scheme has already been completed, it has ... -
Riprap design on the downstream slopes of rockfill dams
Hiller, Priska Helene (Doctoral theses at NTNU;2017:140, Doctoral thesis, 2017)Sammendrag: Erosjonssikring av stein er mye brukt, blant annet for å sikre nedstrøms skråning på steinfyllingsdammer mot erosjon fra ulykkeslaster som overtopping eller gjennomstrømning. Denne avhandlingen fokuserer på ... -
Scale model measurements of headloss in unlined tunnels
Ekeade, Olukunle Benjamin (Master thesis, 2017)The purpose of this thesis work is to connect head loss coefficients in two different scale model tunnels to the physical roughness of the surface through measurements of head loss in fully turbulent flow and pressurized ...