problems such as sand mining and pollution. West flowing rivers This is a list of the westward-flowing rivers of Kerala state in southern India, in order of length, and their tributaries. These rivers all originate in the Western Ghats range and flow westward into the Kerala Backwaters or into the Arabian Sea. Length in kilometers is in parentheses. Kasaragod district have the maximum number of west-flowing rivers in Kerala - 12. Periyar River (244) Edamala River Cheruthoni River Mullayar River Muthirapuzha River Perinjankutti River Ambazhachal River Kaniyampuzha River Muttar River Panniyar Bharatapuzha River (209) Thuthapuzha River Kanjirappuzha Gayathripuzha River Kalpathipuzha River Kannadipuzha River Pamba River (176) Azhuthayar Kakkiyar Kakkattar Kallar Perunthenaruvi Madatharuvi Thanungattilthodu Kozhithodu Varattar Utharappalli River Kuttemperoor Chaliyar River (169) Cherupuzha (Mavoor) Iruvanjippuzha Thottumukkam River Kuthirappuzha Kuruvanpuzha Karimpuzha Pandippuzha Neerppuzha Chalakudy River (145) Parambikulam River Kadalundy River (130) Achankoil River (128) Utharappalli River Kallada River (121) Muvattupuzha River (121) Thodupuzha River Kothayar River Kaliyar River Kariyar River Thevalakkadu River Uzhavoor River Valapattanam River (110) Bavali River Pulloopi River Payyavoor River Mundayapuzha River Veni River Aralam River Chandragiri River (105) Kudumbur River Manimala River (90) Vamanapuram River (88) Kuppam River (88) Kuttikol River Meenachil River (78) Meenachal River Kodoor River Karapuzha River Pulinackal River Moorkankavu River Kuttiyadi River (74) Karamana River (68) Shiriya River (68) Kariangode River (64) Chaithravahini River Ithikkara River (56) Neyyar River (56) Mahe River (54) Mundathode River Keecheri River (51) Perumba River (51) Vayalapra River Uppala River (50) Karuvannur River (48) Kurumali River Manali River Anjarakandy River (48) Tirur River (48) Neeleshwaram River (46) Pallikkal River (42) Kallayi River (40) Korapuzha River (40) Mogral River (34) Kavvayi River (31) Kankol Vannathichal Kuppithodu Kuniyan Thanikkudam River (29) Thalassery River (28) Ummanchira River Mamam river (27) Chithari River (25) Ramapuram River (19) Ayiroor River (17) Manjeswaram River (16) East flowing rivers There are three rivers rise in Kerala and flow eastwards, Kabini into Karnataka and the other two into Tamil Nadu. All the three rivers ultimately join the Kaveri river. Kabani (57) Bhavani (38) Pambar (25) See also List of dams and reservoirs in Kerala List of mountains in Kerala Kerala backwaters References Notes Rivers, List of, Kerala Kerala, List of rivers