Tn which Indian state do ‘Ahars’, a type of water harvesting system, exist?

Correct option is D

The correct option is (D) Bihar 

Information booster:

 Ahar: A Traditional Water Harvesting System

• Ahar-pynes are a traditional floodwater harvesting system used in South Bihar, India.
• This system consists of reservoirs called ahars, which have embankments on three sides, and diversion channels known as pynes.
• Pynes are man-made streams designed to collect water from rivers and distribute it for irrigation during dry periods.

Origin and Geography

• The ahar-pyne system originated in South Bihar, a region with fertile plains ideal for agriculture.
• However, this area faces extreme weather challenges.
• Heavy monsoons often cause severe flooding, while weak monsoons lead to droughts.
• Both conditions negatively impact agriculture and the local environment. Additionally, small, fast-flowing rivers in the region swell during rains, worsening the risk of floods.

 How It Works

To manage these challenges, farmers developed the ahar-pyne system. Pynes are dug into the soil to direct water flow, and the ahars act as retention ponds to store excess water.

• Flood Management: The system helps drain excess water during floods.
• Drought Resilience: It retains water for use during dry months.
• Crop Cultivation: The raised banks around pynes and ahars are used for farming. This design allows farmers to grow two crops a year, improving food security and providing additional income.

The ahar-pyne system is an excellent example of sustainable water management adapted to local needs and environmental conditions.