What do you think happens to rainwater in a forest compared to a city?
In a forest, rainwater falls on soil and vegetation, allowing it to seep naturally into the ground.
The trees and plants slow down the flow of water, giving it more time to be absorbed by the soil. This helps recharge groundwater and maintains the water table.
The forest floor acts like a sponge, holding water and releasing it slowly.
In a city, most surfaces are covered with concrete, cement roads, and paved areas.
Rainwater cannot penetrate these hard surfaces and instead flows as runoff into drains. This prevents groundwater recharge.
The chapter explains that in cities with many cemented surfaces, rainwater cannot go into the ground easily, which stops groundwater from getting recharged. Cities need special structures like soak pits and rainwater harvesting systems to help water return underground.
Explanation
The chapter explains in Activity 5 and the 'Do you know?' section that open, uncovered areas allow water to seep into the ground. Soak pits, ponds, human-made lakes, and planting more trees help rainwater return underground. In cities with cemented surfaces, this natural process is blocked.
Solution Steps
In forests, rainwater falls on soil and vegetation, seeping naturally into the ground
Trees and plants slow down water flow, giving more time for soil absorption
This process recharges groundwater and maintains the water table
The forest floor acts like a sponge, holding and slowly releasing water
In cities, concrete and cemented surfaces prevent rainwater from penetrating the ground
Rainwater flows as runoff into drains instead of recharging groundwater
Cities require special structures like soak pits and rainwater harvesting systems to help water return underground