Calculadora de Índice de Estresse Hídrico
Calcule o nível de estresse hídrico de uma região.
Water Stress Ratio
0.400
Water Stress Ratio vs Total Annual Withdrawals
Formula
Water Stress Index
The water stress index measures how much of a region's available water is being used. Higher ratios indicate greater pressure on water resources.
Formula
Water Stress = Total Withdrawals / Renewable Supply
Thresholds
Exemplo Resolvido
A region withdraws 30 km³/year from a renewable supply of 75 km³/year.
- 01Stress ratio = 30 / 75 = 0.400
- 02Stress percentage = 40.0%
- 03Remaining supply = 75 - 30 = 45 km³/year
- 04At 40%, this region is at the high stress threshold
Perguntas Frequentes
What causes water stress?
Water stress results from growing demand (agriculture, industry, population) exceeding renewable supply, often worsened by drought, climate change, and poor management.
Which regions face the most water stress?
The Middle East, North Africa, South Asia, and parts of the American Southwest face the highest water stress. Over 2 billion people live in water-stressed regions.
Can water stress be reversed?
Yes, through efficiency improvements (drip irrigation, recycling), demand management, desalination, and watershed protection. Israel has reduced stress through aggressive water recycling.