Gregor Johnen, M.Sc.

Research Assistant

Employment Record

since 2020

Research Assistant at the Institute of Hydraulic Engineering and Water Resources Management

2020

Research Assistant at Deltares, Delft, the Netherlands

2019

Short Term Scientific Mission at the Faculty of Civil Engineering and Geodesy of the University of Ljubljana, Slovenia

2017-2019

Scientific assistant at Hydrotec Ingenieurgesellschaft für Wasser und Umwelt mbH, Aachen & Essen, Germany

2015-2017

Student Assistant at the Institute of Geography of RWTH Aachen, Faculty of Physical Geography and Climatology

Education

2018-2020

Master-Studies in Transnational ecosystem-based Water Management (TWM) at the University Duisburg-Essen, Germany and at the Radboud University Nijmegen, Netherlands

2013 - 2018

Bachelor-Studies in applied geography at the RWTH Aachen, Germany

    Journal articles

  • Donner, Christoph; Rösch, Hendrik; Johnen, Gregor; Niemann, André
    Werden unsere wasserwirtschaftlichen Entscheidungen durch Digitalisierung und KI in Zukunft besser?
    In: Energie-, Wasser-Praxis Vol. 73 (2022) Nr. 04, pp. 30 - 34
  • Bezak, Nejc; Kovačević, Martina; Johnen, Gregor; Lebar, Klaudija; Zupanc, Vesna; Vidmar, Andrej; Rusjan, Simon
    Exploring options for flood risk management with special focus on retention reservoirs
    In: Sustainability Vol. 13 (2021) Nr. 18, 10099
  • Book articles / Proceedings papers

  • Niemann, André; Mietzel, Thorsten; Oelmann, Mark; Wencki, Kristina; Johnen, Gregor; Freudenberg, Benjamin
    Die digitale Wasserwirtschaft von morgen : Perspektiven zur zukünftigen Datenverfügbarkeit, Datenpflege und Datenanalyse sowie deren gezielter Nutzung
    In: "Wasserwirtschaft im Klimawandel" / Digitale 55. Essener Tagung für Wasserwirtschaft : 09. bis 11. März 2022 / Wintgens, Thomas; Pinnekamp, Johannes (Eds.) 2022
  • Johnen, Gregor; Sapač, Klaudija; Rusjan, Simon; Zupanc, Vesna; Vidmar, Andrej; Bezak, Nejc
    Modelling and Evaluation of the Effect of Afforestation on the Runoff Generation Within the Glinščica River Catchment (Central Slovenia)
    In: Nature-Based Solutions for Flood Mitigation: Environmental and Socio-Economic Aspects / Ferreira, Carla S. S.; Kalantari, Zahra; Hartmann, Thomas; Pereira, Paulo (Eds.) 2022, pp. 215 - 231
  • Johnen, Gregor; Becker, Bernhard; Bouaziz, Laurène; Piovesan, Teresa; Dacheneder, Felix; Snippen, Edwin
    Optimale Talsperrenbewirtschaftung und ihr Nutzen für ein adaptives Einzugsgebietsmanagement : Eine Fallstudie für das Maas-Einzugsgebiet
    In: Wasserbau zwischen Hochwasser und Wassermangel: Dresdner Wasserbaukolloquium 2021 / 44. Dresdner Wasserbaukolloquium 04. – 05. März 2021 / Stamm, Jürgen; Graw, Kai-Uwe (Eds.) 2021, pp. 97 - 106
  • Abstracts

  • Johnen, Gregor; Kley-Holsteg, Jens; Niemann, André; Ziel, Florian
    Incorporating Weather Forecasts into Short-Term Water Demand Prediction using Probabilistic Deep Learning with Long Short-Term Memory Networks
    In: Abstracts & Presentations :: EGU General Assembly 2023 / EGU General Assembly 2023, Vienna, Austria & Online, 23–28 April 2023 (2023) pp. EGU23 - 5731
  • Lectures

  • Johnen, Gregor; Kley-Holsteg, Jens; Niemann, André; Ziel, Florian;
    Probabilistic water demand forecasting focussing on the impact of climate change and the quantification of uncertainties in the short- and mid-term
    EGU General Assembly 2022; Vienna, Austria; 23–27 May 2022,
    Vienna, Austria (2022)

Contact

University of Duisburg-Essen

Institute of Hydraulic Engineering and Water Resources Management

Phone: +49 201 183 4303
Mail

Room: WST-A.05.04

Consulting hours:
by appointment only

Teaching

  • Hydraulic Engineering 1 - Hydromechanics 1 and basic of hydraulic engineering and water management

  • Hydraulic Engineering 2 – Hydromechanics and hydraulic models

  • Hydraulic Engineering 4 – Basics of river basin management

Research Interests

  • Optimization of dam control
  • Databased modeling
  • Probablistic predictions

Master-Thesis

Optimal reservoir operation and its use for adaptive catchment management: A case study for the Meuse catchment

Bachelor-Thesis

Water resources in the Indus Ganges catchment and aspects of their use with respect to climate change