Mobility in Roman Times can be modelled using GIS tools. These resources allow us to understand how communications could be done. In this paper, we debate about a better way to use these models in cases where we have a navigable river in our studied territory. Normally these water spaces are considered as limiters of land movement, because of the real nature of Least Cost Path tools, that will always consider them as natural paths. We argue that in roman mentality the rivers are the best areas for movement and in our current development we could not integrate them with land ones. The main problem is the principal factor in river mobility, the current upstream and downstream. We present a tool in ArcGIS to calculate the Horizontal Factor of the river's current. This allows us to test the integration and results of a combined land and river analysis in different scenarios, like the connexion between centre and node, like a city to the villa. Finally, we argue about the need of this kind of integration to better understand mobility with the ancient mentality, allowing us to consider other ways of cost, not only in terms of time but also in the increased cost value of product transportation.

可以使用 GIS 工具对罗马时代的流动性进行建模。这些资源使我们能够了解如何进行通信。在本文中，我们讨论了在我们研究的领土内有可通航河流的情况下使用这些模型的更好方法。通常，这些水域被视为陆地运动的限制因素，因为最低成本路径工具的真实性质始终将它们视为自然路​​径。我们认为，在罗马人的心态中，河流是最好的流动区域，在我们目前的发展中，我们无法将它们与陆地相结合。主要问题是河流流动的主要因素，当前上下游。我们在 ArcGIS 中提供了一个工具来计算河流水流的水平系数。这使我们能够测试不同场景下土地和河流组合分析的集成和结果，例如中心和节点之间的连接，例如城市到别墅。最后，我们讨论了这种整合的必要性，以更好地理解具有古老思维的移动性，使我们能够考虑其他成本方式，不仅在时间方面，而且在产品运输的成本价值增加方面。