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What is the scientific importance of flood early warning in a river system?

Answer and explanation

Correct answer: It gives timely risk information based on water level and rainfall

Correct answer: B. Flood early warning uses observations and forecasts to identify increasing danger before floodwater causes maximum harm. Instruments and reporting systems can monitor rainfall, river discharge, and water level. Weather forecasts may indicate heavy rain, while river gauges show how high and fast the water is becoming. These data can be compared with danger levels and communicated to authorities and communities. A warning does not stop the river; it gives people time to move to safer places, protect important belongings, close unsafe routes, and organise emergency assistance. Option A is wrong because warning is information, not a permanent barrier. C is impossible, and D is unrelated to monitoring. Memory cue: measure, assess, warn, act.

Related tags

DrainageFlood-WarningRiver-MonitoringDisaster-ManagementRole Of RiversGeographyClass 9 Mcq

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