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How dams fingerprint regional sea-level change
Impounding reservoir water lowers global mean sea level but can raise relative sea level within about 2000 km of large dams.
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How many GRanD reservoirs after 1900 are used?
6,329 reservoirs with 5,979 km³ total volume.
Source: A Spatially Variable Time Series of Sea Level Change Due to Artificial Water Impoundment · DOI · quote verified
What GMSL fall matches that 5,979 km³?
16.6 mm, averaging 0.15 mm/yr from 1900–2011.
Source: A Spatially Variable Time Series of Sea Level Change Due to Artificial Water Impoundment · DOI · quote verified
What happens to relative sea level near a newly filled reservoir?
It rises within about 2000 km even though GMSL falls.
Source: A Spatially Variable Time Series of Sea Level Change Due to Artificial Water Impoundment · DOI · quote verified
What three processes make the local fingerprint?
Extra gravity, Earth’s inertia change, and crustal subsidence.
Source: A Spatially Variable Time Series of Sea Level Change Due to Artificial Water Impoundment · DOI · quote verified
What GMSL drop includes seepage by 2011?
21.8 mm (total impounded volume 7,857 km³).
Source: A Spatially Variable Time Series of Sea Level Change Due to Artificial Water Impoundment · DOI · quote verified
What seepage-inclusive GMSL drop is projected by 2040?
30.1 mm.
Source: A Spatially Variable Time Series of Sea Level Change Due to Artificial Water Impoundment · DOI · quote verified
How large a nearby rise is predicted for Manicouagan filling?
Almost 40 mm over 6 years.
Source: A Spatially Variable Time Series of Sea Level Change Due to Artificial Water Impoundment · DOI · quote verified
Why not scale GRanD volume up to the World Register of Dams?
The missing ~28% of volume has unknown geography, and spatial pattern is the goal.
Source: A Spatially Variable Time Series of Sea Level Change Due to Artificial Water Impoundment · DOI · quote verified
How are future reservoir volumes estimated?
From hydropower capacity using V = 3.19×10^6 m³ MW−1 × P.
Source: A Spatially Variable Time Series of Sea Level Change Due to Artificial Water Impoundment · DOI · quote verified
What 2020–2040 mean GMSL rate from new reservoirs is given?
About −0.3 mm/yr, larger than the 20th-century average.
Source: A Spatially Variable Time Series of Sea Level Change Due to Artificial Water Impoundment · DOI · quote verified
How large is the neglected 3-D Earth-structure fingerprint error?
About 1%.
Source: A Spatially Variable Time Series of Sea Level Change Due to Artificial Water Impoundment · DOI · quote verified