Bhutan - Overlap between surface water and groundwater

8 (billion cubic meters per year) in 2020

Bhutan overlap between surface and groundwater was at level of 8 billion cubic meters per year in 2020, unchanged from the previous year.

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What is overlap between surface and groundwater?

Part of the renewable freshwater resources that is common to both surface water and groundwater. It is equal to groundwater drainage into rivers (typically, base flow of rivers) minus seepage from rivers into aquifers

What is Bhutan overlap between surface and groundwater?