Inaugurated by IN-SPACe
ISRO Registered Space Tutor
S5-SA2-0482
What is Surface Water?
Grade Level:
Class 6
Law, Civic Literacy, Economics, FinTech, Geopolitics, Personal Finance, Indian Governance
Definition
What is it?
Surface water is any water that collects on the surface of the Earth, like in rivers, lakes, ponds, and oceans. It's the water we can easily see and access, unlike water hidden underground.
Simple Example
Quick Example
Imagine you visit a village in Rajasthan, and you see a big pond where buffaloes are bathing and people are collecting water for their homes. That pond water is a perfect example of surface water. It's right there, on the surface of the land.
Worked Example
Step-by-Step
Let's say a small town needs to decide how much water it can use from a nearby river for farming and drinking.
1. First, they measure the average amount of water flowing in the river each day, which is 1000 litres.
---2. They know that 300 litres are needed daily for drinking and cooking.
---3. Another 400 litres are needed daily for irrigating farm fields.
---4. They add up the total daily need: 300 litres (drinking) + 400 litres (farming) = 700 litres.
---5. They compare this to the river's daily flow: 1000 litres (river flow) - 700 litres (total need) = 300 litres.
---6. This means there are 300 litres of surface water remaining in the river each day after meeting the town's needs.
Answer: The town uses 700 litres of surface water daily, leaving 300 litres remaining.
Why It Matters
Understanding surface water is crucial for managing our water resources, which affects everything from farming (economics) to city planning (civic literacy). Careers like environmental scientists, urban planners, and government officials in water departments use this knowledge daily to ensure everyone has access to clean water.
Common Mistakes
MISTAKE: Thinking surface water is only found in oceans. | CORRECTION: Surface water includes all water bodies on land too, like rivers, lakes, ponds, and even small puddles.
MISTAKE: Confusing surface water with groundwater. | CORRECTION: Surface water is visible on the Earth's surface, while groundwater is hidden beneath the ground, in aquifers.
MISTAKE: Believing surface water is always clean and safe to drink. | CORRECTION: Surface water can get polluted easily from human activities and needs to be treated before it's safe for drinking.
Practice Questions
Try It Yourself
QUESTION: Name two large natural bodies of surface water you might find in India. | ANSWER: Rivers (e.g., Ganga, Yamuna) and Lakes (e.g., Wular Lake, Dal Lake).
QUESTION: A small village pond has 5000 litres of water. If farmers use 1500 litres for their fields and families use 800 litres for daily needs, how much surface water is left in the pond? | ANSWER: 5000 - 1500 - 800 = 2700 litres.
QUESTION: Why is a reservoir, which is a man-made lake built by a dam, considered surface water? Give one reason why it's important for cities. | ANSWER: A reservoir is considered surface water because it collects and stores water on the Earth's surface. It's important for cities because it provides a reliable source of drinking water and can be used to generate electricity.
MCQ
Quick Quiz
Which of the following is NOT an example of surface water?
A river flowing through a city
A lake in a national park
Water stored deep underground in an aquifer
A village pond where children play
The Correct Answer Is:
C
Surface water is water found on the Earth's surface. A river, lake, and pond are all visible on the surface. Water stored deep underground in an aquifer is known as groundwater, not surface water.
Real World Connection
In the Real World
In India, many cities like Delhi and Mumbai rely heavily on surface water from rivers like the Yamuna and reservoirs like those in the Western Ghats for their drinking water. The government's Jal Jeevan Mission focuses on providing tap water to every rural household, often sourcing this water from nearby surface water bodies after proper treatment.
Key Vocabulary
Key Terms
RIVER: A natural flowing watercourse | LAKE: A large body of still water surrounded by land | POND: A small body of still water | RESERVOIR: A large natural or artificial lake used as a source of water supply | POLLUTION: The presence in or introduction into the environment of a substance or thing that has harmful or poisonous effects.
What's Next
What to Learn Next
Now that you understand surface water, you should learn about 'Groundwater'. This will help you see the complete picture of Earth's water resources and how they are interconnected, which is vital for our future!
