What defines surface water sources?

Surface water sources are defined as bodies of water that are found on the Earth's surface. This includes rivers, lakes, and reservoirs, which are all examples of locations where water accumulates and is accessible. These sources are critical for various uses, such as drinking water supply, irrigation, and recreational activities.

In contrast, water found underground is referred to as groundwater, which is stored in aquifers and is not classified as a surface water source. Desalination involves the process of converting seawater into freshwater, which does not pertain to natural surface water bodies. Additionally, sourcing water from fog and dew involves atmospheric water collection techniques, which again is distinct from the traditional definition of surface water. Thus, the correct definition highlights the importance of these natural, visible sources of water.