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Floods (Impacts (people trapped or forced to stay in houses, loss of life…
Floods
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Causes
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Land relief- Steep valley sides and slopes causes the rain to run quickly to the river without infiltration causing flooding of river
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Heavy rainfall, prolonged
rainfall causing slow passage of low level systems in temperate regions
Cultivation- Ploughing up and down the slope forms furrows due to which rainwater reaches river faster
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Strategies
Monitoring and managing:
Satellite images and rainfall radar rain gauges to receive rainfall data, River discharge gauge to monitor raising river
level.
Storm hydrographs:
Groundwater flow maintains the river flow during dry periods
Runoff water only enters the river for a short period of time
Throughfall enters the river
river will flood after rainfall causes this water to exceed.
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