← on nowLGR-033 · v0.1.0 · model · model reservoirs: how much, per second and per year
reservoirs · evaporation from dammed water
evaporated, in cubic metres
346 billion
a year
10,964
a second
947 million
a day
returned
?
no ledger. it goes to the sky, and comes down somewhere else, or not.
method Tian et al. 2022 global reservoir evaporation estimate.
- about eleven thousand cubic metres a second. roughly a third of agriculture’s water goes to animals.source: Tian et al. 2022; Mekonnen & Hoekstra 2012
- dammed water evaporates faster than the river it replaced. the loss is designed in.source: methodology note
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<iframe src="https://thetoll.earth/?channel=reservoirs" width="100%" height="520" style="border:1px solid #D9DDDB" title="the toll · reservoirs"></iframe>
or the whole broadcast, every channel, the same for everyone:
<iframe src="https://thetoll.earth/?embed=1" width="100%" height="520" style="border:1px solid #D9DDDB" title="the toll · on now, everywhere"></iframe>
how this number is built
- method
- Tian et al. 2022 global reservoir evaporation estimate.
- range
- 250–400 km³/yr
- confidence
- model
- weakness
- depends on reservoir surface area and climate data; the livestock water share is from a different study (Mekonnen & Hoekstra).
- dispute
- dispute LGR-033 · corrections are credited
- data
- channels.json (sign-in) · full entry · CC BY 4.0