Review the Environmental Characteristics of Historical City of Zahedan-e-Kohne

Historical city of Zahedan-Kohne is located at km20 of south east of Zabol, and at the north part of Zahak basin in Sistan. This city is comprised of 5 (five) separate parts named Ghale, Arg Aval or Arg Zirin, Arg Dovom or Arg foroudin, Sharestan and Rabath. Historical city of Zahedan-e-kohne at its life and prosperity time was considered as one of the largest cities of Iran, and was the centre of Sistan in the centuries of 5 up to 9 Hejri Gamari, but there is no accurate information about the exact area of this important city of Sistan because the existing man made features and monuments have been destroyed with passing the time and intervention of different natural and human factors, but the total area of Ghale,Arg and Sharestan reaches to 3,248,272 m 2. The results of field studies n this city which are performed during 2002-2007 by the writers of this study, clearly confirms that designers, city developers and architectures of historical city of Zahedan-e-Kohne before constructing the city and the buildings inside it, have dominated firstly on the natural geography of the area through performing scientific and professional studies, and considering all the related aspects have established a city which had comfort and peace for his residents due to having all climatic provisions and environmental adaptation.