Erosion
I don't really know what you define as an underwater cave. Some caves have been drowned by rising sea-level, having formed on land at times of lower sea-levels (i.e. during the Ice Age glacials). Others are entirely terrestrial but full in whole or in part with water. Nevertheless, the answer is that normally caves carry water from limestone uplands to their outlet (risings or springs) at lower altitude, so their effect is to replace open streams on the surface with underground ones.Other than that or the occasional collapse of a cave roof to create a doline on the ground above, they don't affect the land surface.
Approximately 97% of the Earth's surface is covered by salt water.
Water makes up about seventy five percent of the Earth's surface.
The all the water on Earth's surface is known as the hydrosphere. This includes water in oceans, rivers, lakes, and ice caps.
Water shapes the Earth's surface through erosion and deposition processes. The flowing water can wear away rocks and soil, carving out landscapes like valleys and canyons. It also transports sediments and deposits them in new locations, contributing to the formation of features such as beaches and deltas. Overall, water plays a major role in sculpting the Earth's surface over time.
it is water cycle
70% or 80% of water covers the earths surface
soften the surface and create earthquakes. another version of the grand canyon
3/4 of the earth's surface is water.
69%
about 30%
the sun
Water.
Ground water.
the water cycle
71.13% of the earth is covered by water. Only 3% of that water is fresh water, the rest is salt water.
Roughly 71% of Earth is covered by water and because that is well over half there is more water than land on Earths surface