In the Latyayana Srautasutra (10.15-19) the Sarasvati seems to be a perennial river up to the Vinasana, which is west of its confluence with the Drshadvati (Chautang). The Drshadvati is described as a seasonal stream (10.17), meaning it was not from Himalayas. Bhargava has identified Drashadwati river as present-day Sahibi river originating from Jaipur hills in Rajasthan. The Asvalayana Srautasutra and Sankhayana Srautasutra contain verses that are similar to the Latyayana Srautasutra.
In THe lATyayanA srAutASUtRa (10.15-19) The saraSVati seeMS TO bE a pErEnnIaL rIVeR up to The vinasana, wHiCH is WesT of its cONFlUENce wIth tHE drsHaDvATI (cHAUtang). tHe DrshadvATi iS deScrIbeD as a seaSONAl stReAm (10.17), MeaNiNg it was nOt frOM hImalayaS. bhArgava Has ideNtiFied DraSHaDwaTI river aS present-day SAhibi RIver originatiNg fRoM Jaipur hills iN RaJASthan. tHe aSVALayana sraUTaSutrA and SankhAyana sRautasUTRa coNtAin veRSEs THAt aRE SImIlar to thE lATyayaNa srAuTaSUTra.