Understanding the Flood Risk
Floods are complex events. Our dashboard simplifies this by analyzing two key data points: Water Levels and Rainfall. Here's how they contribute to the overall risk assessment.
River Water Levels
This measures the height of the river at specific monitoring stations. We analyze two critical aspects:
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Thresholds (Alert, Warning, Danger)
Each station has predefined levels. Crossing these thresholds adds points to the risk score, with "Danger" level contributing the most.
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Rate of Change (Velocity)
A river that is rising very quickly (e.g., more than 0.5 meters in a short period) is a major warning sign. This "rapid rise" adds a significant number of points to the risk score, acting as an early warning.
Rainfall Data
Rainfall is a primary driver of floods. We look at it in two ways:
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24-Hour Intensity
A very large amount of rain in the last 24 hours (e.g., >60mm) can overwhelm drainage systems quickly. "Very Heavy" short-term rain adds a high number of points to the risk score.
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7-Day Cumulative Total
Prolonged rain over several days saturates the ground, meaning any new rain will immediately run off into rivers. A high 7-day total (>150mm) adds points to the score.
How the Risk Score is Calculated
The dashboard adds up all the "risk points" from every station. The final Risk Score determines the overall status. The Contributing Factors list shows you exactly which events (e.g., "Danger level at Station X") are responsible for the current risk level. This makes the assessment transparent and easy to trace back to the source data.
