Development of a water information system for global scale water use assessment

Type: PhD-research

Persons involved:

M. Romaguera (PhD student)

Prof. Dr. Ir. A.Y. Hoekstra (promoter)

Prof. Dr. Z. Su (promoter)

Dr. M.S. Krol

Dr. M.S. Salama

Funding: IGS

Duration: June 2009 – May 2013

This project is carried out under the supervision of members of the Water Engineering and Management at the Civil Engineer Faculty, and the Water Resources department from the Faculty of Geo-Information Science and Earth Observation of the University of Twente. Therefore, the content of the project is influenced by the research expertise and interest of both groups.

The main objective is the use of remote sensing techniques in the field of water management, particularly in ‘Water Footprint’ (WF) studies. The WF of a crop is defined as the volume of water consumed for its production, where green and blue WF stand for use of rain and irrigation water respectively.

The use of Earth observation products of evapotranspiration (ET), precipitation, water storage and runoff is proposed in order to estimate volumes of irrigated water at global scale. Specific objectives of the project are: combination of multi-resolution and multi-spectral data, modeling the separation of ET in green and blue components, and ET modeling under cloudy conditions. The final goal of this work is to achieve WF calculations at global scale during the period 2002-2012 in an appropriate time step.