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Why Oceans Don't Drain Into the Ground

1Introduction: The Ocean Basin as a Container2The Structure of the Seafloor3Permeability and Porosity: The Key Barriers4Hydrostatic Pressure and Equilibrium5The Continental Shelf and Slope6Submarine Groundwater Discharge (SGD)7Tectonic Subduction and Deep Water Cycling8The Global Water Cycle Balance9Common Misconceptions About Gravity and Drains10Conclusion: The Stability of Our Oceans
The Global Water Cycle Balance

Return Flow: Rain and Rivers

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Here is an interactive map of the water cycle. Click the clouds to start raining. Watch how the water hits the land, flows over the surface as rivers, and seeps into the ground as groundwater. Both paths eventually lead back to the ocean. This return flow balances the water lost to evaporation, keeping the total volume in check.
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An interactive diagram showing the path of water vapor condensing into clouds, falling as rain on land, and returning to the ocean via rivers and groundwater.

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