Explanation:

The Lilajan River is a river that flows through the Chatra and Gaya districts in the Indian states of Jharkhand and Bihar. It is also referred to as the Nilanjan, Niranjana or Falgu River.

The Lilajan begins its journey north of Simaria in Chatra district on the Hazaribagh plateau, the western portion of which constitutes a broad watershed between the Damodar drainage on the south and the Lilajan and Mohana rivers on the north. It flows through a deep and rocky channel until it reaches the neighbourhood of Jori. There the hills begin to recede and the stream flows sluggishly over a wide sandy bed. From this point to the Gaya border beyond Hunterganj the river becomes sandy. It is dry in summer but disastrous during the rains. About 10 kilometres (6 mi) south of Gaya it unites with the Mohana River to form the Falgu River.