Sources of Water: Understanding Surface and Groundwater For Class 7

Water is one of the most essential resources for life, yet many of us rarely think about where it actually comes from. From rainwater that fills rivers and lakes to groundwater stored deep beneath the Earth’s surface, each source plays a vital role in supporting living beings and human activities. 

This article provides insights into different sources of water and how they are formed and used in everyday life. By learning about surface water and groundwater, students can better appreciate the importance of clean water, its conservation, and its safe usage. 

Table of Contents

• What are the sources of water?

What are the sources of water?

Rainwater is the purest natural source of freshwater. Rainwater is stored as both surface water and underground water.

Surface water

Surface water generally gets filled by rainwater and the water collected from melted snow. Rainwater is one of the sources of freshwater. Lakes, rivers, ponds and streams are examples of surface water. The discharge of wastewater from factories and sewage facilities pollutes river water and makes it unfit for drinking. It may contain suspended impurities and germs. The consumption of river or lake water without treatment may lead to waterborne diseases such as cholera, typhoid and diarrhoea.

Groundwater

Water stored underground in the cracks and spaces of rocks and soil is known as underground water. When there is rainfall, some of the rainwater gets absorbed by the ground and seeps through the different layers of soil. Finally, it reaches deep under the ground and gets collected. The level of the underground surface where underground rocks are completely saturated with groundwater is called the groundwater table. The underground reservoirs are known as aquifers. Groundwater is filtered naturally through several layers of soil. So, it is clean as compared to surface water.

It is safe to use groundwater for domestic, agricultural and industrial purposes. Groundwater is extracted through wells, hand pumps and tube wells. In some places, water comes out from the ground naturally due to high pressure and is known as spring water.

As we have learned, that how Water sources like surface water and groundwater are crucial for sustaining life on Earth. While surface water is easily accessible, it can be polluted and requires treatment before use. Groundwater, on the other hand, is naturally filtered and often safer, but it must be used wisely to avoid depletion.