Water scarcity occurs when there are insufficient freshwater resources to meet the human and environmental demands of a certain area. given the challenges of population growth, profligate use, growing pollution, and global warming, many countries and major cities worldwide are faced with increasing water scarcity. A fourth approach to measuring water scarcity is the ‘water poverty index’. this approach attempts to take into account the role of income and wealth in determining water scarcity by measuring: (1) the level of access to water; (2) water quantity, quality, and variability; (3) water used for domestic, food, and productive purposes; (4.
The issue explained. water scarcity is a relative concept. the amount of water that can be physically accessed varies as supply and demand changes. water scarcity intensifies as demand increases and or as water supply is affected by decreasing quantity or quality. water is a finite resource in growing demand. Water stress is the ratio of water use relative to water availability and is therefore a demand driven scarcity. [ 1] water scarcity (closely related to water stress or water crisis) is the lack of fresh water resources to meet the standard water demand. there are two type of water scarcity. one is physical. Hence, a comprehensive understanding of water scarcity and the potential solutions for the world’s cities is urgently required to promote more sustainable and livable urban futures 7,18,19. Water scarcity has many definitions but they have one thing in common, which is an excess of water demand over the available supply (damkjaer and taylor 2017).the united nations water succinctly define it as the point at which the aggregate impact of all users impinges on the supply or quality of water under prevailing institutional arrangements to the extent that the demand by all sectors.
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