rain report

 

the rain

The air is full of water molecules, and the degree of its saturation with water increases with increasing altitude from the earth's surface as a consequence of decreasing temperature, which leads to the condensation of this invisible vapor in the air.  upper layers of the atmosphere. Forming small drops of water that accumulate in turn to form clouds, and rain is a form of precipitation, since precipitation is the fall of water from the sky in three forms: rain, snow and hail.  Water falls in the liquid state when the temperature of the air is above the freezing point of water, and in the solid state when its temperature is zero or less.

 Water is a renewable natural resource, since it follows a natural cycle without the need for human intervention. Water evaporates from oceans, lakes, forests, fields, animals, and plants, then condenses and falls to the ground to feed oceans, lakes, rivers, groundwater wells, and other water sources.  Provides adequate moisture to living organisms.

How it rains

Clouds are the main driver of water in the water cycle in nature, they are responsible for moving water from one place to another on Earth, rain falls when the clouds reach a state of supersaturation.  Millions of small droplets carried in the cloud collide with each other, and the smaller droplets merge with the larger droplets when they collide, producing heavier droplets, and so on, until the cloud can no longer support that weight of water droplets. , and falls. .

The importance of rain

The life of civilizations throughout history has depended on rain when surface water sources such as rivers, springs and lakes were difficult to access, or underground wells were scarce.  Groups and individuals collect rainwater for public and private needs.

Rainwater is the primary and most common source of drinking water, according to the US Geological Survey, as rainwater percolates through soil layers to fill the spaces between the rocks in the soil and it forms what is known as groundwater, where groundwater makes up 2% of the water on the  The Earth But it accounts for 30% of the Earth's fresh water, and as its overconsumption continues and its scarcity ceases, fresh water will be even scarcer than it is today. 

Countries with a high level of annual precipitation can take advantage of surplus rainwater by using it for latrines, showers and irrigation of agricultural crops, to conserve public sources of fresh water.  According to the Center for Sustainable Development Studies at the University of Oregon, humanity around the world wastes rainwater despite its importance, for example, it is rare to find water harvesting systems on the roofs of buildings consisting of in gutters connected to pipes that end in tanks to collect rainwater, which can benefit its users of renewable water