Flooding Block vs Resilient Twin Block

See the exact underground mechanism: An identical cloudburst floods Block A due to conduit silt buildup and catch basin backwater, while Block B discharges smoothly via functional outfall slope.

Flooding Urban Block vs Smooth Draining Urban Block Cross-Section

Block A Failure: Stormwater Backup & Siltation

Debris/silt accumulation in underground conduit pipe causes upstream water to push upward through catch basins, flooding streets and basements despite standard rainfall.

Block B Resilience: Unobstructed Gravity Flow

A 1.5% elevation slope coupled with unclogged conduit cross-section allows storm intake to discharge directly to trunk canals without surface ponding.

Topographic Survey & River Systems Datum

Greater Chennai Drainage Basin Grid

Spatial analysis across the three primary river discharge arteries and coastal canal networks.

Chennai Coastal City & Drainage Basins Topography

Topographic Survey & Drainage Basin DatumGreater Chennai Corporation Hydrological Grid

Major River Systems: Cooum, Adyar & Buckingham Canal

Reservoirs: Red Hills & Chembarambakkam Lake

Launch Map Investigation →

4 Wards

Calibrated Urban Basins

100+

2015 Flood Inundation Markers

6 Vectors

DEM, HAND, SWD, Impervious

<200ms

Causal Formulation Engine