The recent flooding in Britain has led to a degree of questioning about how we should hold such data, but it has also reawakened an interest of mine in seeing if OpenStreetMap data can be used for simple modelling of hydrological systems.
First I discuss transient data and look at a different aspect of flooding, the availability of suitable data, in the second part of this post.
|Flooding in the Somerset Levels mapped on OSM
using key natural=water
copyright OSM contributors, CC-BY-SA