Real Hydrological Physics & Directed Acyclic Graph (DAG)
Chennai Catchment Causal Flowchart
Trace the mathematical and physical sequence from extreme cloudburst rainfall (such as Cyclone Michaung) through conduit hydraulics, silt sedimentation, canal tidal surcharge, and street inundation.
Select Calibrated Ward Scenario:
Real-Time Hydraulic Parameter ControlsDrag sliders to simulate alternate storm severities or interventions
🌧️ 24h Rainfall390 mm
150mm (Moderate)480mm (Catastrophic)
🪨 Conduit Silt55% Blocked
0% (Clean)85% (Choked)
📐 Pipe Invert Slope-0.3%
-0.5% (Depression)+2.0% (Gravity)
🌊 Canal Tide Stage+1.3m MSL
+0.2m (Low)+2.2m (Surge)
🏙️ Impervious Cover84%
40% (Permeable)95% (Dense Urban)
Overland Runoff Intake3.14 m³/sRainfall intake rate
Conduit Drain Capacity2.76 m³/sManning gravity discharge
Backwater Surcharge Head+1.03m HeadReverse outward pressure
Predicted Street Ponding0.7m Depth · ~15h⚠️ Partial Ponding
Causal Hydraulic Topology (Click any box to inspect physical evidence)
Animated flowing streams indicate direction of fluid momentum. Vibrant popping pulses highlight bottleneck choke points.
Resilient Flow Throttled Surcharge / Inundated
Hydrological Inspector · Node Detail (Click any box above to switch)
06 · Backwater Inversion Wave
+1.03m Headcritical
Physical Mechanism & Causal Process
Gradually Varied Flow backwater curve pushing submerged canal head backward up through street manholes.
Calibrated against hydrodynamic conservation laws
Empirical Sensor Datum (Cyclone Michaung & Recent Floods)
Manhole telemetry logged positive outward geysering pressure rather than downward suction.
Ground-truth calibrated against GCC stormwater archives
Recommended Engineering Intervention
Construct inland inline surge relief chambers with one-way backflow prevention valves.
Test Countermeasure in Ward Diagnosis →