Underwater walls could save melting glaciers

[Still Waters]

Building walls on the seafloor could prevent glaciers from melting and sea levels rising due to global warming, scientists say.

Barriers of sand and rock positioned at the base of glaciers would stop ice sheets sliding and collapsing, and prevent warm water from eroding the ice from beneath, according to research published this week in the Cryosphere journal, from the European Geosciences Union.

The audacious idea centers on the construction of "extremely simple structures, merely piles of aggregate on the ocean floor, although more advanced structures could certainly be explored in the future," said the report's authors.

https://edition.cnn.com/2018/09/21/us/walls-glaciers-report-environment-intl/index.html

[Farmer77]

6 minutes ago, Still Waters said:

Building walls on the seafloor could prevent glaciers from melting and sea levels rising due to global warming, scientists say.

Barriers of sand and rock positioned at the base of glaciers would stop ice sheets sliding and collapsing, and prevent warm water from eroding the ice from beneath, according to research published this week in the Cryosphere journal, from the European Geosciences Union.

The audacious idea centers on the construction of "extremely simple structures, merely piles of aggregate on the ocean floor, although more advanced structures could certainly be explored in the future," said the report's authors.

https://edition.cnn.com/2018/09/21/us/walls-glaciers-report-environment-intl/index.html

I recognize the initial effect would be small and localized but what are the long term ramifications of altering the natural flow of water around glaciers?