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Table 1 Methodology used for calculation of the morphometric parameters

From: Flash floods mitigation and assessment of groundwater possibilities using remote sensing and GIS applications: Sharm El Sheikh, South Sinai, Egypt

Serial   Parameters Units Method of calculations References
No.  
1 Linear Sum of all stream numbers (S Nu)   Counted using Arc GIS software where (Nu is the number of order u)  
2   Sum of all stream lengths (S Lu) Km Measured from DEM using Arc GIS software  
4   Bifurcation ratio (Rb)   Rb = Nu/Nu + 1 Horton (1945)
5   weighted mean bifurcation ratio (WMRb)   WMRb = ∑[(Rbu:u+1)*(Nu + Nu+1)]/∑N Strahler (1953)
6   Valley length (VL) Km Measured from DEM using Arc GIS software  
7   Basin length (LB) Km Measured from DEM using Arc GIS software  
3   Sinuosity index (Si) Km Si = sinuosity (VL / LB) (km). Gregory and Walling (1973)
8 Areal Drainage frequency (F) km-2 F = ∑Nu/A Horton (1945)
9   Area of alluvium deposits in basin (Av) km2 Measured from DEM using Arc GIS software with geologic maps  
10   Drainage density (D) km-1 D = ∑Lu/A Horton (1945)
11   Perimeter (P) Km Measured from DEM using Arc GIS software  
12   Area of the basin (A) Km2 Measured from DEM using Arc GIS software  
13   Elongation ratio (Re)   Re = 2(A/Π)0.5/LB Schumm (1956)
14   Circularity ratio (Rc)   Rc = 4ΠA/P2 Miller (1953)
15   Length of overland flow (Lo) Km Lo = 1/2D Horton (1945)
16   Texture Ratio (Rt) Km-1 Rt = ∑Nu/p. Horton (1945)
17   shape index (Ish)   Ish = 1.27. A/LB2 Hagget (1956)
18 Relief Relief (R) m Measured from DEM using Arc GIS software  
19   Slope index (SI)   SI = E85 − E10/ 0.75 VL  
20   Relief ratio (Rr)   Rr = R/LB Schumm (1956)
21   Ruggedness number (Rn)   Rn = DR Melton (1957)
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