Saraswati river civilization. S KalyanaRaman 2008. AK Gupta 2004. S Ramasamy 2005
Above 2500 settlements around Yamuna.
Referred in Vedas. Nadistuti hymn in rig Veda mentions Saraswati between Yamuna and satluj. Later texts - tandya brahman - mention it dried up up in a desert. Seasonal rivers like Ghaggar flow that course.
Parallel civilization to Indus valley. Major sites like Rakhi gadi Kali bangan dholavira and lothal lie on its course.
Remote sensing has another its course.
Climate change made the river extinct and also the civilization.
2016 Valdiya panel. River originated in adibadri in Himalayas and was lifeline of North West India. Possibly two branches Western and eastern.