3 ms·
In the US at least the USGS builds floodplain predictions for most of the major streams/rivers using this exact method. The problem is that those maps typically
by woeirua 5y ago
In the US at least the USGS builds floodplain predictions for most of the major streams/rivers using this exact method. The problem is that those maps typically underestimate the amount of water that falls during these extreme events.
- bombcar 5y agoThey are also sometimes based on assumptions about the land upon which the rain is falling - forests and meadows absorb way more water before runoff begins than concrete and asphalt do.