Water » Archive "Water Resources"
How Much Water Moves Between the Global Stores of Water?

What Is the Global Water Budget?

THE HYDROLOGIC CYCLE is key to many physical and biological processes on Earth as water moves in and out of different parts of the system. It also results in the conversion of solar energy to other forms of energy, such as when water that evaporated from the ocean later falls as rain, forms a river, […]

Where Did Earth’s Water Come from and Where Does It Occur Today?

Where Does Water Occur on the Planet?

WATER IS ABUNDANT ON EARTH, occurring in many settings. Most water is in the oceans, but is salty. Most fresh water is in ice and snow or in groundwater below the surface, with a smaller amount in lakes, wetlands, and streams. Water also exists in plants, animals, and soils and as water vapor in the […]