Searched for: subject%3A%22tracers%22
(1 - 20 of 43)

Pages

document
Kianfar, B. (author), Tian, Jingya (author), Rozemeijer, Joachim (author), van der Zaan, Bas (author), Bogaard, T.A. (author), Foppen, J.W.A. (author)
In recent years, DNA-tagged silica colloids have been used as an environmental tracer. A major advantage of this technique is that the DNA-coding provides an unlimited number of unique tracers without a background concentration. However, little is known about the effects of physio-chemical subsurface properties on the transport behavior of...
journal article 2022
document
Spekreijse, Pierrick (author)
Colloidal particle swarms can show settling velocities over a thousand times as fast as that of a single particle. The transport of colloidal particles is thus strongly affected by the formation and behaviour of these particle swarms, which could have important implications for the widespread use and prevalence of colloidal particles. Swarming...
master thesis 2021
document
Hemamalini, S.S. (author)
Water electrolysis is a popular energy storage technique used in tandem with many renewable sources to convert the generated energy into storeable hydrogen. The efficiency of water electrolyzers is greatly affected by overpotential losses. Bubble evolution is a unique characteristic of flows in water electrolysis. The evolution of bubbles alter...
master thesis 2021
document
Uphues, Charlotte (author)
Coastal aeolian sediment transport is influenced by supply-limiting factors such as sediment sorting by grain size. Sorting processes can cause a coarsening of the bed surface and influence the formation of aeolian ripples. However, it is not fully understood what influence sorting processes have on the magnitude of this transport. In this study...
master thesis 2021
document
van Rhijn, Fay (author)
Surface water tracing experiments help to identify the flow paths of in-stream mass transport. This provides useful information for developing mitigation measures for contamination, and thereby for solving environmental problems. Salts, fluorescent dyes and isotopes are commonly used tracer substances.<br/>However, it is well known these tracers...
master thesis 2021
document
van de Voort, Nick (author)
The production of water masses formed by convection in the Labrador Sea (i.e. Labrador Sea Water, LSW) and its variability contributes to the variability of the Atlantic Meridional Overturning Circulation (AMOC). Several studies put the role of the Labrador Sea under renewed debate, and suggest a rather complex interplay between the production...
student report 2021
document
Engler Faleiros, D. (author)
Particle Image Velocimetry (PIV) relies upon the introduction of particle tracers that scatter sufficient light and follow the flow accurately. The use of submillimetre helium-filled soap bubbles (HFSB) as flow tracers for PIV is investigated for the purpose of enabling velocity measurements in large-scale industrial wind tunnels. That soap...
doctoral thesis 2021
document
des Tombe, B.F. (author)
The pressure on groundwater systems, especially in coastal regions, increases as the population rapidly grows. In these regions, management of water tables and fluxes is important to minimize droughts, salt-water intrusion, and flooding. Proper management of such groundwater systems requires knowledge of how groundwater responds to water...
doctoral thesis 2021
document
Larrarte, Frédérique (author), Lepot, M.J. (author), Clemens, F.H.L.R. (author), Bertrand-Krajewski, Jean-Luc (author), Ivetic, Damjan (author), Prodanovic, Dusan (author), Stegeman, B. (author)
The knowledge of water levels and discharges in urban drainage and stormwater management (UDSM) systems is of key importance to understand their functioning and processes, to evaluate their performance, and to provide data for modelling. In this chapter, devoted mainly to underground combined and separate sewer pipe systems, various methods and...
book chapter 2021
document
Sime, Nathan (author), Maljaars, J.M. (author), Wilson, Cian R. (author), van Keken, Peter E. (author)
Tracer methods are widespread in computational geodynamics for modeling the advection of chemical data. However, they present certain numerical challenges, especially when used over long periods of simulation time. We address two of these in this work: the necessity for mass conservation of chemical composition fields and the need for the...
journal article 2021
document
Tang, Yuchen (author), Foppen, J.W.A. (author), Bogaard, T.A. (author)
Surface water tracing is a widely used technique to investigate in-stream mass transport including contaminant migration. Recently, a microparticle tracer was developed with unique synthetic DNA encapsulated in an environmentally-friendly silica coating (Si-DNA microparticle). Previous tracing applications of such tracers reported detection...
journal article 2021
document
Sharma, Anuvansh (author), Foppen, Jan Willem (author), Banerjee, Abhishek (author), Sawssen, Slimani (author), Bachhar, Nirmalya (author), Peddis, Davide (author), Bandyopadhyay, S. (author)
Abstract: To monitor and manage hydrological systems such as brooks, streams, rivers, the use of tracers is a well-established process. Limited number of potential tracers such as salts, isotopes and dyes, make study of hydrological processes a challenge. Traditional tracers find limited use due to lack of multiplexed, multipoint tracing and...
journal article 2021
document
Pearson, S.G. (author), van Prooijen, Bram (author), Poleykett, Jack (author), Wright, Matthew (author), Black, Kevin (author), Wang, Zhengbing (author)
Sediment tracer studies use uniquely identifiable particles to track the pathways and fate of individual sand or silt grains in marine environments. These techniques are best applied to assess connectivity between potential sediment sources and sinks, such as between a sand nourishment and an ecologically sensitive area. Significant challenges...
journal article 2021
document
Knoppert, Daan (author)
In 2019 werd er voor het eerst een foto van een zwart gat gepubliceerd. Het betreffende super zware zwarte gat ligt in het midden van het sterrenstelsel Messier 87. In dit onderzoek willen we simulaties maken van hoe een foto van een zwart gat eruit ziet. Zowel voor een achtergrond (zoals de sterrenhemel) als de accretieschijf die eromheen zit....
bachelor thesis 2020
document
Cain, Molly R. (author), Ward, Adam S. (author), Hrachowitz, M. (author)
Recent studies have demonstrated that compartmentalized pools of water preferentially supply either plant transpiration (poorly mobile water) or streamflow and groundwater (highly mobile water) in some catchments, a phenomenon referred to as ecohydrologic separation. The omission of processes accounting for ecohydrologic separation in standard...
journal article 2019
document
Sprenger, Matthias (author), Stumpp, Christine (author), Weiler, Markus (author), Aeschbach, Werner (author), Allen, Scott T. (author), Benettin, Paolo (author), Dubbert, Maren (author), Hartmann, Andreas (author), Hrachowitz, M. (author)
The time that water takes to travel through the terrestrial hydrological cycle and the critical zone is of great interest in Earth system sciences with broad implications for water quality and quantity. Most water age studies to date have focused on individual compartments (or subdisciplines) of the hydrological cycle such as the unsaturated...
review 2019
document
Stegeman, B. (author), Langeveld, J.G. (author), Bogaard, T.A. (author), Clemens, F.H.L.R. (author)
Due to the ageing of our underground wastewater infrastructure, leakage of sewers and pressure mains and subsequent infiltration or exfiltration are becoming an increasingly important issue. Herein, we present a novel method to detect and potentially quantify exfiltration from sewer systems under variable flow conditions; the DEST method. The...
conference paper 2019
document
Lenchenkov, N. (author), Glasbergen, G. (author), van Kruijsdijk, C.P.J.W. (author)
Heterogeneous reservoirs often have poor sweep efficiency during flooding. Although polymer flooding can be used to improve the recovery, in-depth diversion might provide a more economical alternative. Most of the in-depth diversion techniques are based on the propagation of a system that forms a gel in the reservoir. Premature cross-linking...
journal article 2018
document
Emmanouil, Antonis (author)
Sediment nourishments have become an attractive alternative to hard measures in counteracting long-term river bed degradation. Due to the large degree of uncertainty concerning mixed sediment morphodynamics, river authorities conduct field studies to collect data that will help in the calibration of morphological models, eventually used to...
master thesis 2017
document
Busch, S.P. (author)
The partitioning inter-well tracer test (PITT) is a method to determine average oil saturation between an injector-producer pair. Tracer tests can be used to quantify incremental oil recovery in enhanced oil recovery (EOR) pilots and for reservoir surveillance purposes. This study provides a sensitivity analysis of the inter-well tracer test,...
master thesis 2016
Searched for: subject%3A%22tracers%22
(1 - 20 of 43)

Pages