This may result in water tables dropping and/or reduced surface flow to rivers.
A rip current is a strong surface flow of water returning seaward from near the shore (not to be confused with an undertow).
Less and less water flowed down the Uzboy until, in the 1720s, the river's surface flow completely dried up.
The surface flow becomes very low at the end of summer before the rainy season has commenced.
In a review of 19 surface flow wetlands it was found that nearly all reduced total nitrogen.
The last formula in the Colebrook equation section of this article is for free surface flow.
That suggests the interior of Mars is warmer than previously thought and may help explain how deep ice can suddenly melt to form surface flows.
"Theory of free surface flow over rough seeping beds".
Because the limestone is very porous there are few surface flows of water.
Due to this difference, the river is an ephemeral sand river with surface flow only during the rainy season.