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Table 1

Main roughness characteristics of tested BRs

Indexksyc/ksRoughness arrangementSlope (V:H)
S1R0 Smooth surface – – 1:3 
S1R1A1 1–1.3 cm 2.5 < yc/ks < 6.6 Stripe arrangement 
S1R1A2 1–1.3 cm 2.5 < yc/ks < 6.6 Stripe staggered arrangement 
S1R1A3 1–1.3 cm 2.5 < yc/ks < 6.6 Staggered arrangement 
S1R1A4 1–1.3 cm 2.5 < yc/ks < 6.6 Interlocked arrangement 
S1R2A1 4–6.4 cm yc/ks < 2.5 Stripe arrangement 
S1R2A2 4–6.4 cm yc/ks < 2.5 Stripe staggered arrangement 
S1R2A3 4–6.4 cm yc/ks < 2.5 Staggered arrangement 
S1R2A4 4–6.4 cm yc/ks < 2.5 Interlocked arrangement 
S2R0 Smooth surface – – 1:5 
S2R1A1 1–1.3 cm 2.5 < yc/ks < 6.6 Stripe arrangement 
S2R1A2 1–1.3 cm 2.5 < yc/ks < 6.6 Stripe staggered arrangement 
S2R1A3 1–1.3 cm 2.5 < yc/ks < 6.6 Staggered arrangement 
S2R1A4 1–1.3 cm 2.5 < yc/ks < 6.6 Interlocked arrangement 
S2R2A1 4–6.4 cm yc/ks < 2.5 Stripe arrangement 
S2R2A2 4–6.4 cm yc/ks < 2.5 Stripe staggered arrangement 
S2R2A3 4–6.4 cm yc/ks < 2.5 Staggered arrangement 
S2R2A4 4–6.4 cm yc/ks < 2.5 Compact arrangement 
S3R0 Smooth surface – – 1:7 
S3R1A1 1–1.3 cm 2.5 < yc/ks < 6.6 Stripe arrangement 
S3R1A2 1–1.3 cm 2.5 < yc/ks < 6.6 Stripe staggered arrangement 
S3R1A3 1–1.3 cm 2.5 < yc/ks < 6.6 Staggered arrangement 
S3R1A4 1–1.3 cm 2.5 < yc/ks < 6.6 Interlocked arrangement 
S3R2A1 4–6.4 cm yc/ks < 2.5 Stripe arrangement 
S3R2A2 4–6.4 cm yc/ks < 2.5 Stripe staggered arrangement 
S3R2A3 4–6.4 cm yc/ks < 2.5 Staggered arrangement 
S3R2A4 4–6.4 cm yc/ks < 2.5 Interlocked arrangement 
Indexksyc/ksRoughness arrangementSlope (V:H)
S1R0 Smooth surface – – 1:3 
S1R1A1 1–1.3 cm 2.5 < yc/ks < 6.6 Stripe arrangement 
S1R1A2 1–1.3 cm 2.5 < yc/ks < 6.6 Stripe staggered arrangement 
S1R1A3 1–1.3 cm 2.5 < yc/ks < 6.6 Staggered arrangement 
S1R1A4 1–1.3 cm 2.5 < yc/ks < 6.6 Interlocked arrangement 
S1R2A1 4–6.4 cm yc/ks < 2.5 Stripe arrangement 
S1R2A2 4–6.4 cm yc/ks < 2.5 Stripe staggered arrangement 
S1R2A3 4–6.4 cm yc/ks < 2.5 Staggered arrangement 
S1R2A4 4–6.4 cm yc/ks < 2.5 Interlocked arrangement 
S2R0 Smooth surface – – 1:5 
S2R1A1 1–1.3 cm 2.5 < yc/ks < 6.6 Stripe arrangement 
S2R1A2 1–1.3 cm 2.5 < yc/ks < 6.6 Stripe staggered arrangement 
S2R1A3 1–1.3 cm 2.5 < yc/ks < 6.6 Staggered arrangement 
S2R1A4 1–1.3 cm 2.5 < yc/ks < 6.6 Interlocked arrangement 
S2R2A1 4–6.4 cm yc/ks < 2.5 Stripe arrangement 
S2R2A2 4–6.4 cm yc/ks < 2.5 Stripe staggered arrangement 
S2R2A3 4–6.4 cm yc/ks < 2.5 Staggered arrangement 
S2R2A4 4–6.4 cm yc/ks < 2.5 Compact arrangement 
S3R0 Smooth surface – – 1:7 
S3R1A1 1–1.3 cm 2.5 < yc/ks < 6.6 Stripe arrangement 
S3R1A2 1–1.3 cm 2.5 < yc/ks < 6.6 Stripe staggered arrangement 
S3R1A3 1–1.3 cm 2.5 < yc/ks < 6.6 Staggered arrangement 
S3R1A4 1–1.3 cm 2.5 < yc/ks < 6.6 Interlocked arrangement 
S3R2A1 4–6.4 cm yc/ks < 2.5 Stripe arrangement 
S3R2A2 4–6.4 cm yc/ks < 2.5 Stripe staggered arrangement 
S3R2A3 4–6.4 cm yc/ks < 2.5 Staggered arrangement 
S3R2A4 4–6.4 cm yc/ks < 2.5 Interlocked arrangement 
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