PhD Defence: Agossou Gadedjisso-Tossou

  • DATE / TIME:
    2019/12/18    09:00 - 12:00
    Dresden, Germany


    Agossou Gadedjisso-Tossou, PhD Researcher (UNU-FLORES and TU Dresden)

    West Africa is subject to frequent yield losses due to erratic rainfall and degraded soils. At the same time, its population is expected to double by 2050. This situation is alarming in northern Togo, a West African dry savannah area, where rainfed maize is a staple food. Thus, it is necessary to improve agricultural productivity, e.g., by evaluating and introducing alternative irrigation management strategies, which may be implemented in this region. For this purpose, the present investigation focused on evaluating the potential of deficit and supplemental irrigation, as well as assessing the impact of climate and soil variability on maize yield under irrigated agriculture using irrigation optimisation strategies in northern Togo.

    In his dissertation project “Impact of Climate and Soil Variability on Crop Water Productivity and Food Security of Irrigated Agriculture in West Africa”, Agossou Gadedjisso-Tossou adapted and employed the Optimal Climate Change Adaption Strategies in Irrigation (OCCASION) framework to address the research objectives. It involves: (i) a weather generator for simulating long-term climate time series; (ii) the AquaCrop model, which was utilised to simulate the irrigation during the growing periods and the maize yield response to given irrigation management strategies; and (iii) a problem-specific algorithm for optimal irrigation scheduling with limited water supply.  Five irrigation management strategies in the dry season were assessed regarding their impact on maize yield in northern Togo.

    Agossou Gadedjisso-Tossou will be defending his thesis to fulfil the requirements of the Joint PhD Programme in Integrated Management of Water, Soil, and Waste of UNU-FLORES and Technische Universität Dresden (TU Dresden).

    Thesis reviewers:

    • Prof. Dr Niels Schütze, (TU Dresden) (Thesis supervisor)
    • Associate Prof. Dr Lala Iswari Prasad Ray, Central Agricultural University, Imphal, India
    • Prof. Bancy Mbura Mati, Jomo Kenyatta University of Agriculture and Technology, Kenya


    The Joint PhD programme of UNU-FLORES and TU Dresden, launched in 2015, is embedded within UNU-FLORES’s nexus-oriented research agenda and the corresponding research interests at TU Dresden. The established PhD research projects, co-supervised by researchers from UNU-FLORES and TU Dresden, are designed to reflect nexus thinking on particular problems of environmental resources management focusing on water, soil, and waste. The programme is the first international PhD programme addressing integrated resource management in a truly holistic way.


    Seminar Room, 9th floor
    Ammonstrasse 74
    01067 Dresden