EMPIRICAL METHODS
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CATCHMENT CHARACTERISTICS
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Catchment area, A                = 26.900 km²
Longest watercourse, L           = 6.690 km
Distance outlet to centroid, Lc   = 3.350 km
Mean catchment surface slope, SA = 0.020000 m/m

CALCULATED CATCHMENT PARAMETERS
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Average stream slope, S          = 0.021724 m/m
Midgley–Pitman parameter, C      = 0.17691

MIDGLEY–PITMAN EMPIRICAL METHOD
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Generalised veld-type zone       = Zone 8 — Bushveld

Return period            KT                Peak flow
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1:10                  0.42                60.3 m³/s
1:20                  0.57                81.8 m³/s
1:50                  0.79               113.4 m³/s
1:100                 1.00               143.5 m³/s

CATCHMENT PARAMETER METHOD (CAPA)
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Lumped catchment parameter, M   = 929.668
Regression constant, a          = 0.100803
Mean Annual Flood, Q50%         = 9.4 m³/s

Return period                Kp                Peak flow
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1:2                      1.000                 9.4 m³/s
1:5                      1.976                18.6 m³/s
1:10                     2.859                26.9 m³/s
1:20                     3.953                37.1 m³/s
1:50                     5.737                53.9 m³/s
1:100                    7.118                66.9 m³/s
1:200                    8.428                79.2 m³/s

REGIONAL MAXIMUM FLOOD
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Selection method                = Kovács region
K-factor                        = 5.00
Zone applied                    = Transition Zone
Regional Maximum Flood          = 519 m³/s
Kovács region                   = K5

RMF RATIO RESULTS
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Country / ratio dataset         = South Africa, Lesotho and Eswatini
Return period           QT/QRMF                Peak flow
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1:50                     0.421               218.3 m³/s
1:100                    0.525               272.5 m³/s
1:200                    0.640               331.9 m³/s
