31 - Водні ресурси

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The biggest issue here is the disappearance of the glaciers. They serve as reservoirs of fresh water in solid form and melt to supply downstream irrigation for crops.

3
Causes

Водні ресурси

Melting glaciers threaten water supplies. Indeed, the relative importance of glacier melt water in summer can be considerable, contributing for example to 25% of August flows in the basins draining the European Alps, with an area of about 105 km2 and only 1% glacial cover. Their disappearance could be catastrophic for cities located in valleys watered by rivers flowing down from the surrounding mountains and for freshwater fauna. Glacier meltwater also increases in importance during droughts and heat waves.


Водні ресурси


Водні ресурси

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


2
Consequences

Зменшення врожаю

Водні ресурси


Водні ресурси


1
Other possible cause

Водні ресурси

If seawater rises, it can penetrate the water tables, which are freshwater reserves.


1
Other possible consequence

Водні ресурси

If we consider that hunger and famines are not only a lack of food but also a lack of water.