26 - River Flooding

Ajutised üleujutused 26
Set 4 www.climatefresk.org 26 Veeahela häirimine võib tekitada veetaseme tõusu või langust . Veetaseme tõusu korral võib tekkida ajutine üleujutus . Kui maapind on eelnevalt põua poolt kuivatatud , siis on üleujutuse tagajärjed hullemad , sest vesi jookseb mööda maapinda selle asemel , et maapinda imbuda .

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Causes

Disruption of the Water Cycle

Disruption of the Water Cycle


Droughts

Droughts

See card n26: "If the soil is dried by drought it's worse because the water runs off."

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Consequences

Freshwater Resources

River Flooding

Flooding can lead in some cases to contamination of freshwater resources and affect drinking water systems.
Decline in Agricultural Yields

River Flooding


Human Health

River Flooding

Floods can lead to grave sanitary issues : sewers overflow, cholera threatens.

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Other possible causes

Building Usage

Building Usage

Soil artificialisation is also responsible for flooding because the soil is no longer able to absorb rain water.
Deforestation

Deforestation

Vegetation retains water. Cutting it down can lead to flooding.
Melting Glaciers

Melting Glaciers

It is possible, in certain circumstances of high heat, that very fast rapid melting of glaciers may cause flooding. But the real concern about these glaciers is that they are gradually disappearing, depriving downstream irrigation of a top-up in summer.

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Wrong consequences

Vectors of Disease

River Flooding

Be wary of common misconceptions about flooding, marshes, mosquitos... Flooding can cause sanitation issues, but that is not what we are talking about here.
Marine Submersion

River Flooding

Do not make any confusion between floods and submersions. Floods concern rivers (it's fresh water) while submersions concern sea water (salt water).
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