Physical water scarcity

Physical water scarcity occurs when and where there is not enough water to meet both human demands and those of ecosystems to function effectively. Arid regions frequently suffer from physical water scarcity. It also occurs where water seems abundant but resources are over-committed. This can happen where there is overdevelopment of hydraulic infrastructure, often for irrigation or energy generation. Symptoms of physical water scarcity are severe environmental degradation, declining groundwater and water allocations that favour some groups over others.[1]

The term was first defined in a wide-ranging 2007 study on the use of water in agriculture over the previous 50 years.[2] The study was undertaken by a broad partnership of practitioners, researchers and policymakers, overseen by the International Water Management Institute in Sri Lanka, with the aim of finding out if the world has sufficient water resources to produce food for future populations. The study found that more than 1.2 billion people live in areas of physical water scarcity.

The term economic water scarcity was used by the study to define situations where demand for water is not satisfied because of a lack of investment in water or a lack of human capacity to satisfy demand.

The clean water crisis is a global crisis which is directly related to physical water scarcity. Many third-world countries around the world suffer from the clean water crisis due to the physical scarcity of water.

Clean water crisis
People of Pakistan collect clean drinking water from a tapstand in the town of Ghari Kharo, in western Sindh Province.

The clean water crisis is an emerging global crisis that affects approximately 785 million people around the world.[3] The lack of clean water is the root of the cause of physical water scarcity. Although clean freshwater is a vital resource for human life, 1.1 billion people lack access to water and 2.7 billion experience water scarcity at least one month in a year. By 2025, it is expected that two-thirds of the world’s population may be facing physical water scarcity. As water becomes scarce, people can’t get enough to drink, wash, or feed crops.[4] As a result economic decline occurs. Due to lack of basic water and sanitation, $260 billion is lost globally each year. Water collectors, mainly women and girls, spend most of the hours of their day collecting water limiting them from being able to receive an education and eventually become part of the workforce. 2.4 billion people suffer from the contamination of water and poor sanitation. Contamination of water can lead to deadly diarrheal diseases such as cholera and typhoid fever, and other water-borne illnesses causing 80% of illnesses around the world.[5] A child dies from a water-related disease every two minutes supporting the fact that one in every four deaths in children under the age of five due to water contaminated diseases.[6] In the year 1900, 2% of the world's population suffered from chronic water shortage. This percentage rapidly increased by 2005 where 35% of the world's population lived in regions with physical water scarcity.[7] As a result, the water crisis is the #4 global risk in terms of its impact on society worldwide.

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References
  1. "Coping with water scarcity. An action framework for agriculture and food security" (PDF). Food and Agriculture Organization of the United Nations. 2012. Retrieved 11 January 2018.
  2. Molden, D. (Ed). Water for food, Water for life: A Comprehensive Assessment of Water Management in Agriculture. Earthscan/IWMI, 2007, p.11
  3. "Why Water? - Water Changes Everything". Water.org. Retrieved 2020-03-24.
  4. Matti Kummu; Philip J Ward; Hans de Moel; Olli Varis (2010-08-16). "Is physical water scarcity a new phenomenon? Global assessment of water shortage over the last two millennia". Environmental Research Letters. 5 (3). doi:10.1088/1748-9326/5/3/034006/meta. ISSN 1748-9326.
  5. "Global Water Shortage: Water Scarcity & How to Help - Page 2". The Water Project. Retrieved 2020-03-24.
  6. Jury, William A.; Vaux, Henry J. (2007), "The Emerging Global Water Crisis: Managing Scarcity and Conflict Between Water Users", Advances in Agronomy, Elsevier, pp. 1–76, ISBN 978-0-12-374165-3, retrieved 2020-03-24
  7. Kummu, Matti; Ward, Philip J; de Moel, Hans; Varis, Olli (July 2010). "Is physical water scarcity a new phenomenon? Global assessment of water shortage over the last two millennia". Environmental Research Letters. 5 (3): 034006. doi:10.1088/1748-9326/5/3/034006. ISSN 1748-9326.
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