mamangam festival was celebrated on the bank of the river
Mamankam festival Māmānkam (Tamiḻ/Malayāḷam: Māmāngam/Mahāmaham or Māmākam) was a duodecennial medieval fair held on the bank, and on the dry river-bed, of Pērār (River Nil̥a, River Ponnani, or Bhāratappuḻa) at Tirunāvāya, southern India. The Hindu temple associated with the festival was Nava Mukunda Temple, Tirunavaya. It seems to have begun as a temple festival, analogous to the Kumbha Melas at Ujjaini, Prayaga, Haridwar and Kumbakonam.[1]
Brahmaputra River The Brahmaputra (/ˌbrɑːməˈpuːtrə/ is one of the major rivers of Asia, a trans-boundary river which flows through China, India and Bangladesh. As such, it is known by various names in the region: Assamese: ব্ৰহ্মপুত্ৰ নদ ('নদ' nôd, masculine form of 'নদী' nôdi "river") Brôhmôputrô [bɹɔɦmɔputɹɔ]; Sanskrit: ब्रह्मपुत्र, IAST: Brahmaputra; Tibetan: ཡར་ཀླུངས་གཙང་པོ་, Wylie: yar klung gtsang po Yarlung Tsangpo; simplified Chinese: 布拉马普特拉河; traditional Chinese: 布拉馬普特拉河; pinyin: Bùlāmǎpǔtèlā Hé. It is also called Tsangpo-Brahmaputra (when referring to the whole river including the stretch within Tibet).[3] The Manas River, which runs through Bhutan, joins it at Jogighopa, in India. It is the tenth largest river in the world by discharge, and the 15th longest.