Joep Schyns


Joep Schyns, MSc.


Civil Engineering


Water Management


PhD candidate


+31 53 489 4799

Tel. Secretary

+31 53 489 4320


Postal address

University of Twente
Faculty of Engineering Technology
Department of Civil Engineering

Water Management chair

P.O. Box 217
7500 AE Enschede, The Netherlands

Visiting address

University of Twente
Drienerlolaan 5
7522 NB Enschede, The Netherlands
Horst Building
Room HR-W119

PhD research

Green water scarcity and the potential of green water for reducing agricultural blue water consumption

Agricultural water consumption is dominated by ‘green water’ (soil moisture directly returning to the atmosphere as evaporation) as opposed to ‘blue water’ (surface- and groundwater). Though, research and debate on freshwater scarcity always focus on blue water, because there is a clearly expressed ‘demand’ and blue water can be ‘supplied’. Since there is also an implicit demand for green water, which sustains agriculture and forestry, and its availability is limited, green water is scarce as well.

This research aims to contribute to the scientific understanding of green water scarcity by exploring and applying new comprehensive definitions of green water availability, consumption and scarcity and assessing these variables on a global scale at high spatial and temporal resolution for the present situation and future scenarios, with an initial case study for China. Furthermore, the study will quantify to which extent increased production from rain-fed lands can reduce demand for blue water resources.

A major part of the study is to model the water use of crops with AquaCrop for the entire world, at 5 arc minute spatial resolution, inter-annually.

Other research topics

Water footprint and water scarcity assessments to inform national water policy in semi-arid, water-scarce countries. I have done case studies for Morocco and Jordan.


For an up-to-date overview of my publications please visit my profile on ResearchGate:

Or alternatively, my profile on LinkedIn:


  • 2011-2013 M.Sc. Civil Engineering and Management, University of Twente, the Netherlands, CUM LAUDE
    Specialization: Water Engineering and Management
    M.Sc. thesis: Studied the added value of Water Footprint Assessment for national water policy for the case of Morocco. Carried out at applied research institute Deltares, the Netherlands.
  • 2008-2011 B.Sc. Civil Engineering, University of Twente, the Netherlands
    B.Sc. thesis: Studied the water footprint of barley production for a large maltery and identified hotspot. Carried out at Heineken Supply Chain Services, the Netherlands.