IS 7784:2010 is the Indian Standard (BIS) for design of parallel runway drainage. IS 7784 covers drainage design for airports — ensuring rapid removal of surface water from runways and taxiways for safe aircraft operations. Covers both surface (slopes, channels, inlets) and subsurface (perforated pipes, filter media) drainage systems.
Code of practice for design of surface drainage and subsurface drainage for airport runways, taxiways, and aprons.
Overview
Status Current
Usage level Specialized
Domain Transportation — Roads and Pavement
Type Code of Practice International equivalents
Also on InfraLens for IS 7784
Practical Notes
! Airport drainage design uses the Rational Method — same as highway drainage.
! Runway must drain within minutes — ponding causes hydroplaning risk for aircraft.
! Subsurface drainage is critical at joints in rigid pavements to prevent pumping.
Frequently referenced clauses
Cl. 4 — Rainfall intensity and runoff estimation
Cl. 5 — Surface drainage design — slopes, channels
Cl. 6 — Subsurface drainage — pipe sizing
Cl. 7 — Materials for drainage structures
airport drainage runway drainage surface drainage subsurface drainage taxiway
International Equivalents Similar International Standards
FAA AC 150/5320-5D FAA (US)
High Current
Airport Drainage Design
Both cover airport surface and subsurface drainage design.
Key Differences
≠ IS uses Indian rainfall data. FAA uses US rainfall data. Design methodology is similar.
Key Similarities
≈ Both use Rational Method for peak flow estimation and similar slope requirements for runways.
Parameter Comparison
Parameter IS Value International Source Runway transverse slope 1.0-1.5% 1.0-1.5% FAA AC 150/5320-5D
⚠ Verify details from original standards before use Report Error
Key Values3 Quick Reference Values
Runway transverse slope 1.0-1.5%
Taxiway transverse slope 1.0-1.5%
Minimum longitudinal slope 0.5%
Key Formulas
Q = CIA/360 (Rational method for peak runoff)
Tables & Referenced Sections Key Tables
Table 1 — Rainfall intensity factors
Table 2 — Runoff coefficients
Frequently Asked Questions1 What is the standard runway slope for drainage? + 1.0-1.5% transverse slope from centreline to edges. Minimum 0.5% longitudinal slope. Designed for rapid water removal to prevent hydroplaning.
QA/QC Inspection Templates 📋
QA/QC templates coming soon for this code.