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Access to Fresh Water - Coggle Diagram
Access to Fresh Water
Freshwater Resources
Water Composition
97.5% Saltwater: In oceans, not drinkable without desalination
2.5% Freshwater: Found mainly in ice caps (68%), groundwater (30%), surface water (0.3%)
Surface Water Resources
Rivers and Lakes: Main sources for human consumption but subject to seasonal and climatic variations
Wetlands: Act as natural filtration systems, recharging groundwater, and supporting biodiversity
Groundwater
Stored in aquifers (porous rock layers); often non-renewable if extraction rate exceeds recharge rate
Recharge Rate: Dependent on rainfall, soil type, and geography
Ice and Snow
Polar ice caps and glaciers contain most freshwater, but climate change is leading to their rapid melting
Mountain Glaciers: Source of river systems (e.g., the Himalayas feeding the Ganges, Indus)
Geographical Disparities
Regions with High Availability: Canada, Russia, Amazon Basin in Brazil
Regions with Low Availability: Middle East, Northern Africa, parts of Australia, with high drought risk
Demand for Freshwater
Agricultural Use
Irrigation
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Practices vary: inefficient methods (e.g., flood irrigation) versus more efficient methods (e.g., drip irrigation)
Water-Intensive Crops
Rice, cotton, sugarcane, and livestock require significant amounts of water
Industrial use
Power Generation: Thermoelectric plants use water for cooling; hydropower relies on abundant freshwater sources
Manufacturing: Sectors like textiles, electronics, mining, and paper require large water quantities
Pollution Concerns: Industrial runoff can introduce toxic chemicals (e.g., heavy metals, dyes) into water systems
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