Not having seen the Mandali region for himself, the present writer is not able to give a proper ecological-topographical description of the Choga Mami area. Therefore this introduction must needs be superficial, based upon details published by Joan Oates, supplemented by information kindly supplied by her in personal communication.

Mandali lies roughly 125 km. E.N.E. of Baghdad as the crow flies, not far from the Iranian frontier. It is a staging post on the ancient caravan route to Persia and beyond. The excavation area is fairly near to the town in a north-westerly direction, a flat plain on the borderline of the alluvium in the marginal rainfall zone. The terrain is backed towards the N.E. by two low mountain ranges a few kilometres away, locally known as Jebel Kunah and Jebel Kaum a Sang. Phyto-geographically it is in the middle of what is described as the Persian Foothills Region.

The main source of water is and has always been the small river Gangir that from the N.E. cuts through a gap between the two mountain ranges, supplemented by other, less reliable, seasonal watercourses. Although, geographically speaking, this area is an extension of the Diyala plain, neither the Gangir nor any of the other watercourses of the region reach the Diyala drainage system, but are swallowed up in seasonal mudflats in the intervening desert S.W. of Choga Mami. Even now irrigation agriculture in the district is fed mainly by the Gangir, but on its way into the desert the water gets increasingly brackish and becomes useless for agriculture.