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How does the landscape of the South Bihar Plain differ from that of northern Bihar?

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The Mahabodhi Temple at Bodh Gaya, Bihar, India, features a tall, intricately carved central spire surrounded by smaller shrines, trees, and gardens. — Bihar Mahabodhi Buddhist temple, built in the 2nd century ce, Bodh Gaya, Bihar, India.

The state of Bihar is divided by the Ganges River into two distinct regions with differing landscapes.1

North Bihar Plain

The North Bihar Plain is a largely flat, low-lying alluvial region situated less than 250 feet above sea level. It is characterized by:1
* Hydrology: Numerous rivers flowing from the Himalayas create frequently changing channels, often resulting in destructive flooding.1
* Soil: The area consists primarily of new alluvium, ranging from light-textured sandy loam in the west to heavy-textured clay in the east.1
* Hazards: The region is prone to both flooding and significant seismic activity.1

South Bihar Plain

In contrast, the South Bihar Plain features a more varied topography.1
* Relief: Unlike the uniform northern plains, the southern landscape includes many hills rising from the alluvium and the Kaimur Plateau in the southwest.1
* Soil: The region is composed mainly of older alluvium, featuring darkish clay or yellowish loam, with poorer sandy soils found toward the south.1
* Drainage: Southern rivers are generally smaller than their northern counterparts, and their water is frequently diverted for irrigation.1