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Geoenvironmental Disasters

Table 1 SWMM model calibration parameters

From: Investigation and simulation of flood inundation hazard in urban areas in Iran

Parameters

Rank of variation allowed

Initial value

Optimal value

Imperv (%)

±30%a

–

–

Slope (%)

±30%a

–

–

Width (m)

±30%a

–

–

N-imperv

0.011–0.033b

0.013

0.018

N-perv

0.02–0.8a

0.05

0.02

Des-imperv (mm)

0.3–2.5b

1.778

2

Des-perv (mm)

2.5–5.1c

3.81

4.1

Zero-Imperv (%)

5–20b

21

18

  1. a(Temprano et al., 2005)
  2. b (Rossman, 2010)
  3. c (Tsihrintzis & Hamid, 1998)
  4. – Without optimal value and a single initial value (distributed parameter)
  5. Percent of impervious area (%Imperv), Width of overland flow (Width), Mannings N for impervious area (N-imperv), Mannings N for pervious area (N-perv), Depth of depression storage on impervious area (Des-imperv), Depth of depression storage on pervious area (Des-perv) and Percent of impervious area with no depression storage (Zero-Imperv)
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