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Where i live, i know the whole water from a defined area flows through in a little stream. I know the areas watersheds and i know how much poured down in extrem
by PicassoCTs 5y ago
Where i live, i know the whole water from a defined area flows through in a little stream. I know the areas watersheds and i know how much poured down in extreme cases. Thus i can mark the area on a topographic map, i can calculate the area and multiply it with the max amount of downpour.
In my area thats 4490887(m^2) ×0,2(m^3 water) = 898 177.4 ^ m3 max rain water. Now all i want is a model of what areas would be reached on a stream if it received this much water.
I know that some here are grumpy because there houses may loose value like a sinking ship very soon. But knowing is better then not knowing. Always.
No fluid-simulations needed, just a basic Topographic map fill the pond.
- woeirua 5y agoIn 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.
- thehappypm 5y agoYou're missing a key variable here: time. If you dumped that amount of rain water in one second, you'd have a Tsunami. Dump it over a 24 hour period, it might flow out smoothly out of a little stream. Dump it 10% in an hour, 50% in the next hour, 10% the next hour, 30% over the next 12? Um, that's harder.