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\hypersetup{pdftitle={Inverse Modelling of Parameters for Water and Solute Transport in the Soil"=plant System under Sugarcane},pdfauthor={Hélène Maron, Sarah Garré, Jarbas Honorio De Miranda, Katharina Grecco},pdfsubject={Tropentag 2016: Abstract},pdfkeywords={Drip-irrigation, inverse modelling, sugar cane},pdfpagemode=None,colorlinks=true}
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\parbox[b]{13.4cm}{\centering \large{\textbf{Tropentag, September 18-21, 2016, Vienna, Austria}}\\[1ex] \Large{``Solidarity in a competing world ---\\fair use of resources''\\[2ex]}}
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\begin{center}
\Large{\textbf{Inverse Modelling of Parameters for Water and Solute Transport in the Soil"=plant System under Sugarcane\footnote{\textbf{Contact Address:} Hélène Maron, University of Liège, Gembloux Agro-bio Tech, Waimes, Belgium, \mbox{e-mail}: \email{h16maron@gmail.com}}\\[0.8ex]}}
\normalsize{\textsc{Hélène Maron$^{1}$, Sarah Garré$^{2}$, Jarbas Honorio De Miranda$^{3}$, Katharina Grecco$^{4}$}}
\end{center}
\begin{itemize*}
\item[]{\small{\textit{$^{1}$University of Liège, Gembloux Agro-bio Tech, Belgium}}}
\item[]{\small{\textit{$^{2}$Université de Liège, Agro-Bio Tech, Belgium}}}
\item[]{\small{\textit{$^{3}$University of Sao Paulo,  "luiz de Queiroz College  of Agriculture (ESALQ, USP), Department of  Biosystems Engineering, }}}
\item[]{\small{\textit{$^{4}$University of Sao Paulo,  "Luiz de Queiroz College  of Agriculture (ESALQ, USP), Department of  Biosystems Engineering, Brazil}}}
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\index[author]{Maron, Hélène}
\index[author]{Garré, Sarah}
\index[author]{De Miranda, Jarbas Honorio}
\index[author]{Grecco, Katharina}
\begin{center}
\vspace{1.1cm}
\textbf{Abstract}
\begin{abstract}
\normalsize{
In the context of growing population and climate change, an equilibrium between crop production and human need for finite resource has to be found.  Following the Food and Agriculture Organisation (FAO), the agricultural sector is responsible for the uptake of \mbox{69\,\%} of the total water withdrawal. On the other hand, municipal sector (including drinking water) use only \mbox{12\,\%} (Aquastat, 2007). The food"=water-energy nexus necessitates an improved understanding of water and nutrient transport in the soil plant system. Targeted experiments alongside appropriate modelling strategies, allows to develop forecasting which can lead to water saving and to a better use of fertilisers in addition to obtaining good crop yields. 



In this study, the objective is to obtain and improve a modelling tool to predict and regulate nutrient and water use of sugar cane through inverse modelling. Moreover, an experiment is conducted in a greenhouse in Brazil. Soil moisture at different depths is measured in the root zone using Time Domain Reflectometry (TDR) probes during 1 year. The soil in the greenhouse is a Ferralsol (WRB) and the crop water demand is provided using drip"=irrigation. An inverse modelling scheme is conducted using this dataset to obtain the hydraulic parameters adapted to the experiment. For realise this, a Levenberg-Marquardt scheme implemented in the Hydrus2D/3D code is applied.



The expected results will be to obtain suitable hydraulic parameters for the experimental setup. Variability in time might be encountered due to the development of the sugar cane during the growing season. With this optimised parameter, response of the crop to a particular management or natural event like drought could be modelling more precisely. 



}

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\noindent \textbf{Keywords:} Drip"=irrigation, inverse modelling, sugar cane
\index[key]{Drip"=irrigation}
\index[key]{Inverse modeling}
\index[key]{Sugar cane}
\end{document}
