31 - Ferskvannsressurser
✏️ This explanation does not yet exist in your language. Please fill this Google Form if you want to help us!
Det store temaet er isbreenes forsvinning. De fungerer som reservoarer for ferskvann i fast form og smelter (spesielt om sommeren, når det er varmt) for å forsyne vanning av avlinger nedstrøms[1].
[1] AR6 WG1 Box TS.6 s53 // SROCC FAQ 2.1, Figur 1 s162
3Causes
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.
Flooding can lead in some cases to contamination of freshwater resources and affect drinking water systems.
3Consequences
Les ressources en eau douce jouent un rôle crucial dans le développement économique et social, et les disparités dans l'accès et la gestion de ces ressources peuvent exacerber les inégalités existantes. Une gestion durable et équitable de l'eau est donc essentielle pour promouvoir un développement équilibré et inclusif.
Sources : AR6 WG2 FAQ 8.1 p1263 (p1251) // AR6 WG2 8.2.1.2 p1190 (pp1178)
1Other possible cause
If seawater rises, it can penetrate the water tables, which are freshwater reserves.
1Other possible consequence
If we consider that hunger and famines are not only a lack of food but also a lack of water.