1-    fountier rivers:

1-1 :doiraj rivers:

the out fall basin of doiraj river with an area basin about 3198194 kilometer(cubic) in international frontier , located at the end of the south –eastern of ilam province . it is ambarracced by kabir kouh and dinar kouh – siah kouh and marzo kouh . the direction of it is morement is from north to south – emactly only with the maimeh rivers.

This rivere is originated from the southern braes of kabir kouh,

And along with it is direction from north to south of to south of the basin after passing the gachsaran entensive eguipment and after thoroughly irrigating the mousian and fakeh and , enters irag. The above mentioned out fall basin is between and 3203 to 3304 , northern latitude and 47  10 to 47   53 eastern longitude.

This river is embaraced from north by kabir kouh heights.

From east to out fall basin of siah gaav , from west to the out file basin of maimeh river and from south to the irag country . this system is suppered by snow resources and the functions of the kabir kouh