The situation whereby the Aryans are indigenous and compose the bulk of the [Rg Veda] in the 4th millennium in Saptasindhu is a very simple one and i… - Nikos Kazanas

In this study Witzel talks of a peaceful immigration but also uses the terms "battles" and "campaigns" (324), "initial conquest" (326) and "frequent warfare" (339) thus indicating that beneath the lipservice to "migration" (which became fashionable) lurks the notion of invasion.

Now in Avestan ‘lake/pool’ is vairi-. In fact Avestan has no verb or nouns cognate to the Sanskrit ones √sṛ >sar-. The only cognation is harah- in the name of the river harahvaiti – nothing else. But S √sṛ >sar- is a perfectly PIE morpheme appearing in Tocharian B sal-ate, Gk hiallō/hallomai and Latin salire all implying ‘moving, jumping’. Avestan somehow lost this root and its derivatives. So, how did the Iranians manage to concoct this name Harahvaiti, that sounds so exactly like a transliteration of the Vedic Sarasvatī , when they had no words from √sṛ > sar-? Adherents of the AIT offer no rational answers. (For full discussion see Kazanas 2004b, Prabhakar 1994/1995.) There is only one possible explanation. The Iranians, having lived in Saptasindhu moved to Iran (retaining the memory of the place as Haptahәndu); on meeting an amenable river there they gave it the name of the river they had formerly known – Sarasvati > Harahvaiti. The AIT can in no way, except by violating rationality, explain the two Avestan names Haptahәndu and Harahvaiti. This, if nothing else, should have alerted the AIT adherents to the possibility that there is something very seriously wrong in their migrationist scenario. Moreover, it is part of the general linguistic theory that the Avestan h derives from PIE s: so, it is again extremely difficult to see how the IAs who moved further southeast, retained the original s (in saras and saptasindhu) while the Iranians changed it to h.

Rather, the Iranians left the region of the 7 rivers and held the name in their memory. Something very similar happens with the V river-name Sarasvat/ and Av Harahvaiti-. Avestan has no other cogn with harah- whereas S has sr > sarati/sisarti, sarana, saras, sarit, etc, etc and of course cognates are found in other IE branches: here again it is the Iranians that took with them the memory of the Indic river and gave it to a river in their new habitat... Moreover, Vedic retains the PIE s but this becomes h in Avestan. All this actual linguistic evidence and the conclusion it forces upon us has some archaeological/geographical support. G Gnoli, who is a normal AIT adherent and by no means an indigenist, showed very clearly that the early portions of the Avesta hardly know northern and western Iran and he analyses migrations there from south to north and east to west but not north- west down to south-east (1980). Thus while the conjectural Indo-Iranian movement south-eastward contains many anomalies, the Iranian movement from Saptasindhu north-westward accommodates all facts.