Tim van Emmerik

Research interest

Microwave emission and backscatter of vegetated surfaces are influenced by the dielectric constant of vegetation, which is a function of vegetation water content. The variation in vegetation water content is highly depending on the available moisture in the root zone. Understanding the effect of changing root zone water availability on the vegetation dielectric constant could therefore improve soil moisture retrieval using microwaves above vegetated areas.

In the years to come, my research will focus on understanding the effects of water stress on vegetation water content, vegetation dielectric constant and emission/backscatter of microwaves. How? Spend many a day modeling changing dielectric properties of maize plants, and measuring water stressed leaves in the field!

Background

Tim started his Ph.D. in July 2013. Before, he finished both his B.Sc. and M.Sc. in Civil Engineering at Delft University of Technology. For his BSc thesis, Tim investigated how the design of small scale irrigation systems could improve agricultural activities in Kilole, Kenya. This included a month long fieldwork campaign. From August 2012 to March 2013, Tim worked on his MSc thesis: “Diurnal differences in vegetation dielectric constant as a measure of water stress”.

Over the years, Tim worked on various projects, covering many fields of hydrology and water resources management. In the fall of 2011, he designed a new method to measure the temperature in the upper layer of lakes using Distributed Temperature Sensing, which was successfully tested in Israel and Ghana. During the spring of 2012, Tim spent three months in an ungauged basin in Cambodia, to develop an approach to quantify annual water availability, to be used for agriculture. From April to July 2013, Tim was a visiting scientist at the University of Illinois at Urbana-Champaign, where he made the first steps in developing a distributed socio-hydrologic model.

In 2012, Tim was the co-founder of the Young Hydrologic Society, an organization to connect young hydrologists all over the world and thereby stimulating scientific collaboration. 

Besides water resources and hydrology, Tim is very passionate about traveling in strange places, CouchSurfing, learning languages, Italian cuisine, slow food, and thinking about ways to make this world a better place.

Publications

Peer-reviewed journals

Hut, R., Tyler, S., and van Emmerik, T. (2016). Proof of concept: temperature-sensing waders for environmental sciences, Geosci. Instrum. Method. Data Syst., 5, 45-51, [doi:10.5194/gi-5-45-2016].

Hilgersom, K. P., van Emmerik, T. H. M., Solcerova, A., Berghuijs, W. R., Selker, J. S., and van de Giesen, N. C. (2016). Practical considerations for enhanced-resolution coil-wrapped Distributed Temperature SensingGeosci. Instrum. Method. Data Syst. Discuss., [doi:10.5194/gi-2016-1].

van Emmerik, T., Mulder, G., Eilander, D., Piet, M. and Savenije, H. (2015). Predicting the ungauged basin: Model validation and realism assessmentFront. Earth Sci. 3:62, [doi:10.3389/feart.2015.00062].

van Emmerik, T., Steele-Dunne, S.C., Judge, J. and van de Giesen, N., (2015). Impact of Diurnal Differences in Vegetation Water Content on Radar Backscatter From Maize During Water Stress. IEEE Transactions on Geoscience and Remote Sensing, vol. 53, issue 7, [doi:10.1109/TGRS.2014.2386142].

Van Emmerik, T.H.M., Z. Li, M. Sivapalan, S. Pande, J. Kandasamy, H.H.G. Savenije, A. Chanan and S. Vigneswaran, (2014). Socio-hydrologic modeling to understand and mediate the competition for water between agriculture development and environmental health: Murrumbidgee River basin, Australia. Hydrol. Earth Syst. Sci., 18, 4239-4259, [doi:10.5194/hess-18-4239-2014].

Van Emmerik, T.H.M., A. Rimmer, Y. Lechinsky, K.J.R. Wenker, S. Nussboim, N.C. van de Giesen, (2013). Measuring heat balance residual at lake surface using Distributed Temperature Sensing.  Limnology and Oceanography: Methods, 11:79-90, [doi:10.4319/lom.2013.11.79].

Conference Proceedings

van Emmerik, T., Steele-Dunne, S.C., Judge, J. and van de Giesen, N., (2015). A Comparison Between Leaf Dielectric Properties Of Stressed and Unstressed Tomato Plants, in Proc. 35th Annu. IGARSS, Milan, Italy, July 26-31, vol. 1, pp. 275 - 278, IEEE, 2015.

 

Conference Abstracts and Presentations

van Emmerik, T., M. Guerin, S. Steele-Dunne, P. Gentine, N. van de Giesen: “Detecting tree mass changes using accelerometers”, AGU Fall Meeting 2015, San Francisco, H23G-1653, poster, 2015.

van Emmerik, T.: “4 Reason Why All Geoscientists Should Do Fieldwork”, AGU Fall Meeting 2015, San Francisco, Pop-Up, 2015.

van Emmerik, T., S. Steele-Dunne, J. Judge, N. van de Giesen: “Plant Water Stress Detection Using Radar: The Influence Of Water Stress On Leaf Dielectric Properties”, EGU General Assembly 2015, Vienna, Geophysical Research Abstracts, Vol. 17, EGU2015-10888, oral, 2015.

Solcerova, A., T. van Emmerik, K. Hilgersom, N. van de Giesen: “Practical considerations for coil-wrapped Distributed Temperature Sensing setups”, EGU General Assembly 2015, Vienna, Geophysical Research Abstracts, Vol. 17, EGU2015-5506, poster, 2015.

van Emmerik, T.:”What scientists can learn from Plato’s symposium”, EGU General Assembly 2015, Vienna, Geophysical Research Abstracts, Vol. 17, EGU2015-3748, oral, 2015.

van Emmerik, Tand E. Aalbers: “Shaping the Scientific Community: Why You Should Get Involved”, AGU Fall Meeting 2014, San Francisco, ED21F-01, oral, 2014

van Emmerik, T., S. Steele-Dunne, J. Judge and N. van de Giesen: “Plant Water Stress Detection Using Radar: The Influence Of Water Stress On Leaf Dielectric Properties”, AGU Fall Meeting 2014, San Francisco,  B31F-0085, poster, 2014.

van Emmerik, T., M. Sivapalan, Z. Li, S. Pande and H. Savenije: “Socio-hydrologic Modeling to Understand and Mediate the Competition for Water between Humans and Ecosystems: Murrumbidgee River Basin, Australia”, EGU General Assembly 2014, Vienna, Geophysical Research Abstracts, Vol. 16, EGU2014-10495, poster, 2014.

van Emmerik, T., S. Steele-Dunne, J. Judge, N. van de Giesen: “Impact of diurnal variation in vegetation water content on radar backscatter of maize during water stress”, EGU General Assembly 2014, Vienna, Geophysical Research Abstracts, Vol. 16, EGU2014-6070, poster, 2014.

van Emmerik, T., W.R. Berghuijs, M. Smoorenburg, S. Harrigan, H. Muller and J. Dugge: “How the Young Hydrologic Society can rejuvenate hydrology”, AGU Fall Meeting 2013, San Francisco, ED31F-01, oral, 2013.

van Emmerik, T., S. Steele-Dunne, J. Judge, N. van de Giesen: “Diurnal effect of water stress on the dielectric properties of corn”, AGU Fall Meeting 2013, San Francisco, H43G-1555, poster, 2013.

Sivapalan, M., T. van Emmerik, H. Savenije and S. Pande: “A socio-hydrological model to explain the ‘pendulum swing’ in the human-water system dynamics in the Murrumbidgee cathcment, Australia”, AGU Fall Meeting 2013, San Francisco, H21N-04, oral, 2013.

van Emmerik, T., D. Eilander, M. Piet, G. Mulder: “Innovative use of soft data for the validation of a rainfall-runoff model forced by remote sensing data”, EGU General Assembly 2013, Vienna, Geophysical Research Abstracts, Vol. 15, EGU2013-5465, poster, 2013.

van Emmerik, T., S. Steele-Dunne, J. Judge, N. van de Giesen: “Diurnal variation of vegetation dielectric properties as an indication of water stress”, EGU General Assembly 2013, Vienna, Geophysical Research Abstracts, Vol. 15, EGU2013-1984, poster, 2013.

van Emmerik, T.H.M., A.M.J. Coenders-Gerrits and J. Wenninger: “Partitioning of evaporation fluxes in summer and winter using stable isotope approach”, EGU General Assembly 2012, Vienna, Geophysical Research Abstracts, Vol. 14, EGU2012-3779, poster, 2012.

van Emmerik, T.H.M., K.J.R. Wenker, A. Rimmer, S.A.P. de Jong, Y. Lechinsky and N.C. van de Giesen: “A new approach of surface flux measurements using DTS”, EGU General Assembly 2012, Vienna, Geophysical Research Abstracts, Vol. 14, EGU2012-4088, poster, 2012.

 

Theses

van Emmerik, T.H.M.:”Diurnal differences in vegetation dielectric constant as a measure of water stress”, M.Sc. thesis, Delft University of Technology, 2013.

van Emmerik, T.H.M.:” Partitioning of evaporation fluxes in summer and winter using stable isotope approach”, Additional M.Sc. thesis, Delft University of Technology, 2011.

van Emmerik, T.H.M. :”Agriculture in Kenya: Design of a small-scale irrigation system to stimulate agricultural activies in Kilole”, B.Sc. thesis, Delft University of Technology, 2011.

 

Other

Berghuijs, W., S. Harrigan, E. Kipnis, N. Dogulu, M. Floriancic, H. Müller, I. Pohle, F. Sedlara, S. Saia, M. Smoorenburg, C. Teutschbein and T. van Emmerik, “Creating community for early-career geoscientists”,Eos, 96, [doi:10.1029/2015EO041439], 2015.

van Emmerik, T.:”Fall Meeting’s First Student and Early Career Conference”, Eos, 96, [doi:10.1029/2015EO024053], 2015.

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Tim van Emmerik