underground aquifers
An aquifer is underground.
heavy rain on sloped granite
runoff
If you are talking about land above sea , then it would be called run off, because when precipitation falls , whether it is rain or snow , at some point it usually makes its way from the land to the sea via flowing over the surface of the earth.
Ground off and runoff are both precipitation and fresh water. Since they are fresh water, people use groundwater and runoff for households and drinking waters sometimes.
A runoff is precipitatoin soaks into the ground, precipitation can also run over the ground and flow into streams, rivers, lakes, and eventually the ocean.
surface runoff (also known as overland flow or terrestrial runoff) is the unconfined flow of water over the ground surface, in contrast to channel runoff (or stream flow)
heavy rain on sloped granite
Say you are a water droplet in the ocean. This is how your day goes; Evaporation, Condensation, Precipitation, Runoff, Transpiration, Infiltration, Aquifer, Surface Water in the ocean.
runoff
Urbanization increases surface runoff, by creating more impervious surfaces such as pavement and buildings, that do not allow percolation of the water down through the soil to the aquifer. It is instead forced directly into streams or storm water runoff drains, where erosion and siltation can be major problems, even when flooding is not. Increased runoff reduces groundwater recharge, thus lowering the water table and making droughts worse, especially for farmers and others who depend on water wells.
First the water will rain down, causing runoff, and the runoff water will carry dirt and sediment with it, causing a stream to form overtime as the runoff trail keeps on indenting into the ground.
Runoff
Ground water, or an aquifer.
recharge
Runoff is water that flows over the ground surface. Snowmelt runoff is runoff from melting snow.
runoff can pollute a river or stream because when the water flows over the ground, it could pick up some trash or garbage on the ground, and the garbage could flow with the runoff. Then when the runoff enters a stream, lake, or ocean, the garbage will flow into the water, causing pollution.
Surface runoff of water that generally can be counted on as a stable source of water from year to year.