What are typical infiltration rates for permeable pavements?

New pervious concrete: 1,000–6,000 mm/hr (40–240 in/hr); new porous asphalt: 1,000–3,000 mm/hr; PICP with gravel-filled joints: 500–1,500 mm/hr. Design rates should be reduced to 50% of measured rate to account for aging and partial clogging. ASTM C1701 and ASTM D7063 provide standard test methods.

How do I size a permeable pavement system for a storm event?

Design storage volume V = A_surface × i × (T/1000) × (1-C_subbase), where A is pavement area, i is design rainfall intensity, T is storm duration, and C_subbase is 0.4 (aggregate void ratio). The aggregate base course must drain within 48–72 hours. Check exfiltration rate against native soil permeability ≥ 15 mm/hr per ICPI Tech Spec No. 15.

Permeable Pavement Infiltration Rate Calculator

Calculate stormwater infiltration capacity for pervious concrete, porous asphalt, and permeable interlocking concrete pavement (PICP) systems.

2D stress state at a point. All stresses in MPa.

σx — Normal Stress X (MPa)

σy — Normal Stress Y (MPa)

τxy — Shear Stress (MPa)

⚙ Mechanical Note: Results are based on standard textbook formulas and ISO/AASHTO references. Always verify critical designs with applicable codes (ISO 898, AASHTO 1993, AISC, Eurocode 3) and a qualified engineer.

How to Use

Enter the values for the patient or scenario you are assessing. Calculate stormwater infiltration capacity for pervious concrete, porous asphalt, and permeable interlocking concrete pavement (PICP) systems. Use the permeable pavement result to inform your clinical assessment.

Related Calculators

Green Roof Runoff

Engineering

Bioretention Sizing

Engineering

Rational Method Runoff

Engineering

Permeable Pavement Infiltration Rate Calculator

How to Use

Related Calculators

Frequently Asked Questions

What are typical infiltration rates for permeable pavements?

How do I size a permeable pavement system for a storm event?