I want to buy ArcGIS software for my Master thesis sake. I intend to use ArcSWAT within ArcGIS environment for hydrological modeling of a surface basin and study the impact of climate change in the fresh water availability within the basin. I contacted the company of the software and they ask me for which of the following extensions I also need to buy. Accordingly, I want to ask people who have done such work before, which extensions I will require for my thesis purposes in arcgis and arcSWAT ?.
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