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\hypersetup{pdftitle={Calibration of a SWAT Hydrologic Model for the Tamer Watershed in Northern Iran},pdfauthor={Sara Moftian, Farshad  Kiani, Majid Afyuni, Abolfazl  Mosaedi, Golaleh  Ghaffari, Karim Abbaspour},pdfsubject={Tropentag 2010: Abstract},pdfkeywords={Calibration, runoff, SWAT, watershed modeling},pdfpagemode=None,colorlinks=true}
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\parbox[b]{13.4cm}{\centering \large{\textbf{Tropentag, September 14-16, 2010, Zurich}}\\[1ex] \Large{``World Food System  ---\\A Contribution from Europe''\\[2ex]}}
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\begin{center}
\Large{\textbf{Calibration of a SWAT Hydrologic Model for the Tamer Watershed in Northern Iran\footnote{\textbf{Contact Address:} Sara Moftian, Gorgan University, Agricultural Sciences, Gorgan, Iran, \mbox{e-mail}: \email{s.moftian@yahoo.com}}\\[0.8ex]}}
\normalsize{\textsc{Sara Moftian$^{1}$, Farshad  Kiani$^{2}$, Majid Afyuni$^{3}$, Abolfazl  Mosaedi$^{1}$, Golaleh  Ghaffari$^{4}$, Karim Abbaspour$^{5}$}}
\end{center}
\begin{itemize*}
\item[]{\small{\textit{$^{1}$Gorgan University, Agricultural Sciences, Iran}}}
\item[]{\small{\textit{$^{2}$Gorgan University, Soil Science, Iran}}}
\item[]{\small{\textit{$^{3}$Isfahan University of Technology, Department of Soil Science, Iran}}}
\item[]{\small{\textit{$^{4}$Azad University, Agricultural Sciences, Iran}}}
\item[]{\small{\textit{$^{5}$Swiss Federal Institute of Aquatic Science and Technology (Eawag), System Analysis, Integrated Assessment and Modelling, Switzerland}}}
\end{itemize*}
\index[author]{Moftian, Sara}
\index[author]{Kiani, Farshad }
\index[author]{Afyuni, Majid}
\index[author]{Mosaedi, Abolfazl }
\index[author]{Ghaffari, Golaleh }
\index[author]{Abbaspour, Karim}
\begin{center}
\vspace{1.1cm}
\textbf{Abstract}
\begin{abstract}
\normalsize{
SWAT2005 (Soil and Water Assessment Tool) was used to simulate runoff and investigate the effect of various rain"=gauge stations on the results of the model in Tamer watershed in northern Iran. The calibrated model will be used to predict the impact of different management operations on the runoff, sediment, and nutrient loads in the 1524 km$^{2}$ watershed. SUFI2 version 2.1.5 was used to calibration and performs uncertainty analysis of the model. The watershed studied included two climate and rain gauge stations Tamer and Golidagh. Tamer is located at the very end of the watershed and Golidagh is located at the top of the watershed. The model was calibrated with Golidagh rain gauge station for the years 1999--2005 and validated with the Tamer rain gauge station for the years 1990--1993. The results showed that the model had reliably simulated runoff in both of stations. Four factors were considered in judging the model performance of runoff: P-factor, R-factor, R$^{2}$ and NS. The respective values of each were, respectively, 0.65, 1.2, 0.55 and 0.55 for calibration and 0.56, 1.2, 0.77 and 0.7, for validation.}

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\noindent \textbf{Keywords:} Calibration, runoff, SWAT, watershed modeling
\index[key]{Calibration}
\index[key]{Runoff}
\index[key]{SWAT}
\index[key]{Watershed modeling}
\end{document}