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A 1:50,000 pedological soil map and texture was obtained from the FAUT (1993) as well as some textural soil profiles description for all the major soils. The main soil characteristics of Taleghan watershed are presented in Table 2. Daily stream flow and total suspended sediments data from 2005 to 2010 measured at Galinak hydrometric station were used for the calibration and validation of SWAT.

Table 2

Soil group classification of the Taleghan watershed

No.Hydrologic groupArea (%)Texture
22.24 Clay-Loam 
32.11 Loam 
1.92 Loam 
4.9 Sandy-Loam 
27.24 Sandy-Loam 
0.9 Sandy-Loam 
2.42 Loam 
0.98 Loam 
4.78 Silty-Loam 
10 2.51 Clay-Loam 
No.Hydrologic groupArea (%)Texture
22.24 Clay-Loam 
32.11 Loam 
1.92 Loam 
4.9 Sandy-Loam 
27.24 Sandy-Loam 
0.9 Sandy-Loam 
2.42 Loam 
0.98 Loam 
4.78 Silty-Loam 
10 2.51 Clay-Loam 

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