Tier-1 screening — staged for review, unsigned. read values from the tables, not from the 3D view
Terrain and flood surface
The relief map keeps the accepted flood surface readable on every device;
move across it for coordinates, terrain elevation and modeled depth. Switch to 3D to orbit
and zoom. Read decision values from the tables, not from this display.
Move over the map for elevation and depth
Flood depth: shallow to deep
HEC-RAS 2D model perimeter
Dam / structure centreline
Outflow boundary
Potential Consequence Index
CWC CDSO components. Class boundaries at 300 and 600; this dam sits
. Click a bar to expand its sub-components.
Warning time against exposure
Arrival from breach initiation (x) against population at risk (y);
dashed lines are the medians. Upper-left is the priority quadrant. Point size is total
village population, colour is worst hazard class.
Cumulative population at risk
How quickly population becomes at risk after breach initiation. Each step
is a village reaching its arrival time; the interactive form of the EAP’s exposure
curve. Hover for the village.
Hazard-class shares
Population split across the six CWC hazard classes for the most exposed
villages. Hover a segment for the class and count.
Discharge along the flood path
Peak discharge at each chainaged reporting section, showing attenuation
downstream of the dam.
Evacuation routes
Screened routes. A route crossing water is time-limited, not closed —
it is passable before the flood arrives.
Flood and evacuation network map
All 53 screened routes over the accepted maximum-depth surface. Hover to magnify;
the white network is the available road fabric and coloured links are the screened route corridors.
This is the accepted Tier-1 atlas view, not a substitute for field route approval.
Villages
Click a row to highlight it in the quadrant. Population split is across the
six CWC hazard classes; PAR is classes H3–H6.