Publications

4221 results

  • Performance of full scale constructed wetlands in removing antibiotics and antibiotic resistance genes

    Authors: Sabri, N.A.; Schmitt, H.; Zaan, B.M. van der; Gerritsen, H.W.; Rijnaarts, H.H.M.; Langenhoff, A.A.M. (2021)
    Published in: Science of the total environment (2021), page 1-42

    Additional treatment of wastewater, such as constructed wetlands (CWs), is a possible solution to reduce the discharge of antibiotics and antibiotic resistance genes (ARGs) from households and industry to the environment. This study aims to investigate the occurrence and removal of antibiotics and ARGs by two full scale CWs operated at different hydraulic retention times (HRT), namely 1 day and 3 days. Both CWs were receiving the same wastewater treatment plant (WWTP) effluent. Temporally and spatially distributed sampling of water and sediment was conducted for one year and samples were analyzed for antibiotics and ARGs by using LC-MS/MS and qPCR. Results showed that both CWs removed antibiotics significantly with a comparable overall removal of 28% - 100%, depending on the type of antibiotics. However, some of the antibiotics showed higher concentration after the CW treatment. Five antibiotics (tiamulin, tylosin, oxytetracycline, sulfamethoxazole and trimethoprim) were the most abundant (>1500 ng/L on average) in winter. Meanwhile, ermB was the most abundant (average of 5.0 log) in winter compared to summer (average of 3.5 log). Other ARGs did not show a significant increase or decrease between winter and summer. ARGs were removed from the wastewater by 0.8 to 1.5 log. The HRT did not influence the removal of either the antibiotics or the ARGs. A strong correlation was found between sul genes and intI1. The results also revealed a positive and a negative relationship from sampling point 1 to sampling point 5: a positive relation between abundance of antibiotics, ARGs, and of NO3–N, NH4–N, TP, COD and a negative relation between antibiotics, ARGs and temperature. This relationship showed the effect between antibiotics and ARGs concentrations with physicochemical parameters and nutrients. The ability of CWs to reduce the input of micropollutants into the environment makes CWs a potential post treatment to WWTP.

  • Smart Nutrient Retention Networks : a novel approach for nutrient conservation through water quality management

    Authors: Wijk, D. van; Teurlincx, S.; Brederveld, R.J.; Klein, J.J.M. de; Janssen, A.B.G.; Kramer, L.; Gerven, L.P.A.; Kroeze, C.; Mooij, W.M. (2021)
    Published in: Inland waters (2021), page 1-16

    Nutrients are essential resources for food production but are usedineciently, and thereby they pollute inland and coastal waters and are lost into the oceans. Nutrient conservation by retention and consecutive reuse would prevent nutrient losses to the atmosphere and downstream ecosystems. We present Smart Nutrient Retention Networks (SNRNs) as a novel management approach to achieve nutrient conservation across networks of connected waterbodies through strategic water quality management. To present the key features of SNRNs, we review existing knowledge of nutrient retention processes in inland waters, water quality management options for nutrient conservation, and nutrient retention models to develop SNRNs. We argue that successful nutrient conservation, even at a local level, through SNRN management strategies requires clearly formulated goals and catchment-wide system understanding. Waterbody characteristics, such as hydraulic residence time and the presence of macrophytes, shape local nutrient retention with potential network-wide cascading eects of improved water quality and are therefore key targets of SNRN management strategies. Nutrient retention models that include the self-reinforcing feedback loop of ecological water quality, nutrient retention, and nutrient loading in networks of inland waters in relation to management options can support the development of SNRNs. We conclude that SNRNs can contribute to sustainable use of nutrients in human food production.

  • Rapid assessment of tsunami offshore propagation and inundation with D-FLOW Flexible Mesh and SFINCS for the 2011 Tohoku tsunami in Japan

    Authors: Röbke, B.R.; Leijnse, T.W.B.; Winter, G.; Ormondt, M. van; Nieuwkoop, J.C.C. van; Graaff, R.F. de (2021)
    Published in: Journal of marine science and engineering, volume 9 (2021) issue 5, page 1-16

  • Flexibele drinkwaterwinningen - kennisbasis

    Authors: Jansen, S.; Immers, A.; Postma, M. (2021)

    Onzekerheden in de watervraag en -beschikbaarheid zorgen voor de noodzaak voor flexibelere drinkwaterwinningen. Daarom zijn Vitens, Deltares en Ruimtevolk in 2020 gestart met het driejarige project Flexibiliteit in toekomstige winningen – inspelen op de uitdagingen van de toekomst. In dit rapport wordt de gezamenlijke kennisbasis beschreven, werkpakket 1 van het project.

  • Two-channel system dynamics of the Outer Weser Estuary : a modeling study

    Authors: Gundlach, J.; Zorndt, A.; Prooijen, B.C. van; Wang, Z.B. (2021)
    Published in: Journal of marine science and engineering, volume 9 (2021) issue 4, page 1-21

    In this paper, we unravel the mechanisms responsible for the development of the two-channel system in the Outer Weser Estuary. A process-based morphodynamic model is built based on a flat-bed approach using simplified boundary conditions and accelerated morphological development. The results are analyzed in two steps: first, by checking for morphodynamic equilibrium in the simulations and second, by applying a newly developed method that interprets simulations based on categorization of the two-channel system and cross-sectional correlation analysis. All simulations reach a morphodynamic equilibrium and develop two channels that vary considerably over time and between the simulations. Variations can be found in the location and depth of the two channels, the development of the dominant channel over time and the alteration in the dominance pattern. The conclusions are that the development of the two-channel system is mainly caused by the tides and the basin geometry. Furthermore, it is shown that the alternation pattern and period are dependent on the dominance of the tides compared to the influence of river discharge.

  • GMD Perspective: the quest to improve the evaluation of groundwater representation in continental to global scale models

    Authors: Gleeson, T.; Bierkens, M.F.P. (2021)
    Published in: Geoscientific model development (2021), page 1-59

    Our objective is to provide recommendations for improving the evaluation of groundwater representation in continental- to global-scale models. We describe current modeling strategies and evaluation practices, and subsequently discuss the value of three evaluation strategies: 1) comparing model outputs with available observations of groundwater levels or other state or flux variables (observation-based evaluation); 2) comparing several models with each other with or without reference to actual observations (model-based evaluation); and 3) comparing model behavior with expert expectations of hydrologic behaviors in particular regions or at particular times (expert-based evaluation). Based on evolving practices in model evaluation as well as innovations in observations, machine learning and expert elicitation, we argue that combining observation-, model-, and expert-based model evaluation approaches, while accounting for commensurability issues, may significantly improve the realism of groundwater representation in large-scale models. Thus advancing our ability for quantification, understanding, and prediction of crucial Earth science and sustainability problems. We encourage greater community-level communication and cooperation on this quest, including among global hydrology and land surface modelers, local to regional hydrogeologists, and hydrologists focused on model development and evaluation.

  • Grevelingen: van zout meer naar gedempt getij : ontwikkeling van macrobenthos en inschatting gevolgen van gedempt getij

    Authors: Tangelder, M.; Nolte, A.J.; Mulder, I.M.; Wijsman, J.W.M.; Janssen, J.A.M.; Ysebaert, T.J.W. (2021)
    Published in: Landschap : tijdschrift voor landschapsecologie en milieukunde, volume 38 (2021) issue 1, page 48-57

    Begin jaren zeventig veranderde het Grevelingenmeer door afdamming van een estuarium in een zout meer. Nu treden regelmatig zuurstofarme condities op wat het bodemleven niet ten goede komt. Introductie van gedempt getij zal hierin verandering brengen, maar kan tegelijkertijd leiden tot een compensatieopgave van door Natura 2000 beschermde natuur op de eilanden en oevers. Daarom wordt voor verschillende scenario’s van gedempt getij verkend wat de gevolgen zijn voor natuur boven en onder water.

  • Soil Mission Support : routekaart voor bodemonderzoek voor de Europese Bodemmissie

    Authors: Maring, L.; Brils, J.M.; Ellen, G.J. (2021)
    Published in: Bodem : tijdschrift over duurzaam bodembeheer, volume 31 (2021) issue 2, page 16-17

    Het tweejarige Europese project Soil Mission Support (SMS) is in december 2020 gestart om de missie ‘Gezondere Bodems en Voedselproductie’ te ondersteunen. In dit artikel spreken we over deze ‘Bodemmissie’. Samen met actoren rondom bodem- en landgebruik gaat SMS een routekaart opstellen voor onderzoek- en innovatiebehoeften, en deze inbrengen in onder andere Horizon Europe. Daarnaast wordt voor de roadmap gekeken of er andere netwerken en financieringsconstructies zijn om dit onderzoek op te pakken en uit te kunnen voeren.

  • Vorhersage- und modellbasierter Betrieb von küstennahen Schöpfwerken in den Niederlanden

    Authors: Becker, B.P.J.; Domhof, B.; Heeringen, K.J. van; Talsma, J.; Knot, F.; Schenkel, J. (2021)

    Ein Großteil der Niederlande ist sogenanntes Poldergebiet, das mit Hilfe von Schöpfwerken entwässert wird. Bei den niederländischen Wasserverbänden haben sich operative Entscheidungsunterstützungssysteme etabliert. Nachhaltiger und klimaneutrale Wasserwirtschaft werden als strategische Ziele immer wichtiger, und die Trockenphasen der vergangenen Jahre haben gezeigt, dass ein Entwässerungssystem nicht nur zur Wasserableitung, sondern auch die Wasserzufuhr genutzt werden muss. Ursprünglich nur für den Einsatz im Hochwasserfall vorgesehen, werden die operativen Systeme mittlerweile deshalb im täglichen Betrieb eingesetzt. Am Beispiel des Wasserverbands Noorderzijlvest (Groningen) wird in diesem Beitrag ein solches System vorgestellt.

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