A valley with shallow soils overlaying impermeable bedrock is drained by a single river. It receives 680
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Question:
A valley with shallow soils overlaying impermeable bedrock is drained by a single river. It receives 680 mm of precipitation per year, approximately half as snow and half as rain.
From measurements of the river's depth, width, and velocity, it is determined that approximately 450 mm of water is discharged each year.
How much water [mm] is lost from the valley to the atmosphere by evapotranspiration?
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