Water Resources — Important Questions

They are perennial, They originate from snow-covered areas, They carry water throughout the year

Himalayan rivers are perennial because they originate from snow-covered high altitude areas and receive water from melting snow throughout the year, unlike peninsular rivers which are seasonal.

Natural depressions are available, Hard impervious rocks prevent water seepage, Monsoon climate provides seasonal rainfall

Tank irrigation is popular in peninsular India due to natural depressions for tank construction, hard rocks that don't allow water to seep through, and monsoon climate that fills tanks during rainy season.

Perennial canals work throughout the year while inundation canals work only during floods

Perennial canals draw water from perennial rivers or artificial reservoirs and work year-round, while inundation canals work only when rivers are in flood and have excess water.

Both increasing groundwater levels and preventing soil erosion

Rainwater harvesting serves multiple purposes including recharging groundwater, raising water table levels, preventing soil erosion, and reducing surface runoff.