is easily ACCESSIBLE FRESHWATER that can be found naturally or artificially in formations where WATER CAN ACCUMULATE, called —.

Huge percentage of surface water, about 69%, is — in the form of ice caps and glaciers. It is found at the north and south poles in regions with permanent snow and permafrost (frozen soil). Most of the frozen freshwater are located in the Greenland and Arctic regions, and about 90% of it is found in —.

— contain only a SMALL PORTION of Earth's water resources. They serve as an IMPORTANT SOURCE OF FRESHWATER, which is collected and stored in dams or watersheds to supply the community's water needs.

are smaller versions of a river basin.

A — is made up of SEVERAL WATERSHEDS and is useful for the management of water resources. Some of the largest river basins in the world are located in Northern South America, the Amazon Basin, and the Congo-Zaire Basin in Africa.

accounts for approximately 96% of liquid freshwater.

It is a vital resource because it REPLENISHES SPRINGS and streams and supports wetlands.

is particularly essential when there is a SHORTAGE OF SURFACE WATER.

The —, commonly known as the —, is a natural pathway wherein WATER CHANGES between SOLID, LIQUID, AND GASEOUS PHASES through evaporation, condensation, precipitation, infiltration into the soil, surface runoff, and groundwater discharge.

As water vapor reaches a higher altitude where the temperature is cooler, it undergoes the process of — , where it transforms into larger droplets and accumulates as clouds and fog.

As these droplets grow, collide, and become heavy, it falls as — in the form of rain, hail, or snow.

It refers to the COLLECTION OF RAINWATER from a rooflike surface, which is then redirected to a storage, such as a tank, a cistern, a deep pit (well shaft, or boreholel, an aquifer, or a reservoir with percolation (the process of filtrating fluids through porous materials)

Water collected with this method can be used for watering gardens, livestock, and irrigation With proper treatment, it can also be used domestically

It is the process of directly INJECTING THE SURFACE WATER supplies such as potable water, rainwater. river water, and other reclaimed water into an aquifer (a bed/body of rock that stores groundwater) for later recovery and use by means of a well.

It is the progress of using HUMAN-MADE CONVEYANCES such as infiltration basins, trenches dams, or injection wells for both supplementing groundwater resources and recovering the water to add in an aquifer for various uses

It is USED WATER from bathroom sinks, showers. rubs, and washing machines. — may contain traces of dirt, food, grease, hair, and certain household cleaning products. While — may look "dirty," it is safe to use as irrigation water in a yard.

It is the process of ELIMINATING CONTAMINANTS from municipal wastewater, such as household sewage and some industrial wastewater.

It undergoes physical, chemical, and biological processes to GET RID OF CONTAMINANTS and produce treated wastewater that can be safe enough to be used.

It is the process of using water from two different sources (groundwater and surface water) to maximize sufficient yield.

It is a process of EXTRACTING FRESHWATER from saltwater by removing the unwanted salt content and pumping the brine water back into the ocean.

This is considered as the popular solution to droughts and desert countries such as Arabia and Egypt. Saudi