Page 1 - 2.Lesson Notes-Water Harvesting, Coal and Petroleum

SAI International School
Subject-Biology, Class- X
Chapter- Sustainable Management of Natural Resources
Subtopic- Water Harvesting, Coal & Petroleum
Module- 36

Lesson Notes

Water harvesting

It is capturing, collection and storage of rainwater and surface runoff water for filling
either small bodies or recharging ground water.
Benefits of water harvesting are as follows-
1. It ensures water availability.
2. It reduces the chances of flooding during the rainy season.
3. The groundwater is regularly recharged.

Watershed Management:
Definition- Watershed management emphasises scientific soil and water
conservation in order to increase the biomass production.
 It aims at developing primary resources of land and water to produce
secondary resources of plants and animals for use in a manner which will not
cause ecological imbalance.
Advantage of watershed management are as follows-
1. Increases the production and income of the watershed community.
2. Mitigates droughts and floods.
3. Increases the life of the downstream dam and reservoirs.

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