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Table 3

Calculation models of the migration critical velocity of sediment in the rainwater pipe

Piped50 (mm)Calculation models for VLR2
Plexiglass pipe 0.83 0.7027h0.3258 0.9775 
0.69 0.7223h0.3003 0.9764 
0.59 0.7124h0.2479 0.9538 
0.33 0.7048h0.2125 0.9787 
Steel/PVC pipe 0.83 0.8370h0.2881 0.9021 
0.69 0.8802h0.2928 0.8942 
0.59 0.9102h0.2860 0.7785 
0.33 0.9720h0.3166 0.7827 
Galvanized/clay pipe 0.83 1.3950h0.4013 0.9743 
0.69 1.3890h0.3654 0.9761 
0.59 1.3270h0.2675 0.9801 
0.33 1.2930h0.2205 0.9336 
Cast iron pipe 0.83 1.5660h0.4167 0.9213 
0.69 1.7580h0.4785 0.8981 
0.59 1.8270h0.4644 0.9683 
0.33 1.8600h0.4342 0.9477 
Piped50 (mm)Calculation models for VLR2
Plexiglass pipe 0.83 0.7027h0.3258 0.9775 
0.69 0.7223h0.3003 0.9764 
0.59 0.7124h0.2479 0.9538 
0.33 0.7048h0.2125 0.9787 
Steel/PVC pipe 0.83 0.8370h0.2881 0.9021 
0.69 0.8802h0.2928 0.8942 
0.59 0.9102h0.2860 0.7785 
0.33 0.9720h0.3166 0.7827 
Galvanized/clay pipe 0.83 1.3950h0.4013 0.9743 
0.69 1.3890h0.3654 0.9761 
0.59 1.3270h0.2675 0.9801 
0.33 1.2930h0.2205 0.9336 
Cast iron pipe 0.83 1.5660h0.4167 0.9213 
0.69 1.7580h0.4785 0.8981 
0.59 1.8270h0.4644 0.9683 
0.33 1.8600h0.4342 0.9477 
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