Concept of Groundwater and Some Technical Terms - Water Resource Engineering 1

TL;DR

Groundwater is the underground water that occurs in the saturated zone of variable thickness and depth below the Earth's surface, and it is primarily used for irrigation and municipal water supply purposes.

Transcript

hello everyone in this video we are going to study about the concept of the groundwater and what are some terms which are associated with it so let's start so till now in the hydrology we have studied that about the precipitation and in the precipitation the major form of the precipitation which is falling on the earth surface that is in the form o... Read More

Key Insights

• 💁 Groundwater is formed through the percolation of rainfall into the ground, ultimately reaching the saturated zone.
• 🏝️ It is a vital resource for irrigation in India, with different irrigation schemes based on the area of land being irrigated.
• 🤗 Groundwater is accessed through various methods, such as open wells and tube wells.
• 😒 The availability of groundwater is classified into the zone of saturation and the zone of aeration, with the zone of saturation being the most important for groundwater use.
• 👨‍🎤 The depth and characteristics of the zone of saturation vary depending on the type of rocks present.
• 💦 In the zone of aeration, water exists through molecular attraction, and it is further classified into capillary fringe, soil zone, and intermediate zone.

Questions & Answers

Q: What is groundwater and how is it formed?

Groundwater is the underground water stored in the saturated zone of the Earth's crust. It is formed when rainfall percolates deep into the ground.

Q: How is groundwater used for irrigation in India?

Groundwater is a major source of irrigation in India, supplying water to about 46% of the total irrigated area. Minor, medium, and major irrigation schemes utilize groundwater based on the area of land being irrigated.

Q: What are the methods used to access groundwater?

Groundwater is accessed through wells, such as open wells and tube wells. Open wells use manual or powered devices to lift the water, while tube wells are primarily used for irrigation purposes.

Q: How is the availability of groundwater classified?

The availability of groundwater is classified into two main zones: the zone of saturation and the zone of aeration. The zone of saturation contains water in the voids of rocks, whereas the zone of aeration contains water through molecular attraction.

Summary & Key Takeaways

• Groundwater is formed when rainfall percolates into the ground and reaches a deep level in the Earth's crust.

• It is stored in the saturated zone, which consists of cracks and pores in rocks and unconsolidated layers.

• In India, groundwater is extensively used for irrigation, with minor, medium, and major irrigation schemes depending on the area irrigated.