Climate Change Impacts on Water Resources

Freshwater shortage in the Middle East and North Africa (MENA) is posing a serious threat to economic growth, social cohesion, peace and political stability. Furthermore, today’s freshwater usage does not account for its present and future availability but rather is based on sectoral and geographical competing consumption needs. To make matters worse, this already dire situation is being exacerbated by the rapidly changing climate. Climate change affects water resources by its profound impact on water quantity, variability, timing, form, and intensity of precipitation.

The MENA region, in particular, is highly vulnerable to the disruptive climate change effects because countries within this region are unarguably among the most water-stressed worldwide, with water availability per capita well below the global average.  In addition, most MENA countries belong to a critical combination of low rainfall and high spatial and temporal rainfall variability, with Lebanon being better off among the group in terms of precipitation, and Qatar being worst off in terms of both precipitation and rainfall variability.

How Climate Change affects Water Resources

Warmer temperatures increase the rate of evaporation of water into the atmosphere, in effect increasing the atmosphere’s capacity to “hold” water. This causes earlier and shorter runoff seasons and increases dry seasons. Increased evaporation also decreases soil moisture levels, which in turn increases the frequency of droughts, and increases the likelihood of desertification. In addition, a decrease in soil moisture also lowers infiltration rates, consequently reducing underground aquifer recharge rate.

Climate change also impacts sea levels. Rising sea levels could reduce water quality and availability in coastal areas. Rising sea levels can affect the quality of groundwater through saltwater intrusion into the aquifers. In addition, a rise in sea level will affect above ground hydrology of coastal areas thus reducing freshwater run offs and the presence of above ground freshwater bodies. On the other hand, rising sea levels could also cause water tables in groundwater aquifers to rise, which could increase surface runoff, but at the expense of aquifer recharge. It is predicted that sea levels will rise by 19 to 58 cm by the end of the 21st century, which will affect 12 out of the 19 MENA countries. Such an increase in sea level could cost Egypt, one of the main countries to be affected by sea level rise, 10% of the Nile Delta population together with agricultural land and production.

These decreases in water resources will have costly socio-economic consequences. Water is used in food production, energy production, manufacturing, navigation, land use, and recreation. Therefore it will become increasingly difficult to maintain balance between all human needs while water resources keep diminishing. For example, it is predicted that increased temperatures will increase crop water demand by 5-8% by 2070, which will have to be compensated by using water that was allocated to energy production, thus harming energy production capabilities. The decrease in water resources would also precipitate an increase in the price of water, through monthly water bills, or one-time connection fees for new homes and businesses.

Finally, Decreasing water resources will also lead governments to resorting to economically intensive projects such as desalination plants, pipelines (Red – Dead Sea conveyance project), and dams. These projects are not only economically intensive, but also environmentally unsustainable and will eventually contribute to global warming and climate change (CO2 emissions from desalination plants).

Key Takeaways

Global warming is undeniable and the increase in greenhouse gas emissions will have profound climatic, environmental, and societal impacts worldwide, especially in terms of water resources. This is of great concern for MENA countries, where there has been a recorded increase in frequency of droughts, and where water availability is expected to decrease by 30-50% by 2050. Therefore MENA countries must reduce their respective GHG emissions and make a transition to and clean sources of energy. Regional countries must make urgent and long-term efforts to conserve water by reducing demand and consumption, improving water infrastructure to reduce leakages, improve water management techniques and remove water subsidies.

Every individual depends on a reliable, clean supply of fresh water to sustain his or her health. Water is essential in every part of life from energy and food production to ecosystem maintenance. Therefore actions must be taken not only to stop its decline, but also to improve its status, because without water, there will be no life.

 

Information Resources:

US EPA: http://www.epa.gov/climatechange/impacts-adaptation/water.html

ICBA: http://siteresources.worldbank.org/INTMENAINFRENCH/Resources/Shawki.pdf

FAO: http://bit.ly/1vAZuWK

Choices: http://www.choicesmagazine.org/2008-1/theme/2008-1-04.htm

UNEP: http://www.unep.org/geo/geo_ice/PDF/GEO_C6_C_LowRes.pdf

Water Network: https://water.tallyfox.com/mosaic/video/underground-fresh-water-storage

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About Amir Dakkak

Amir Dakkak, a Palestinian from East Jerusalem, is an Environmental Scientist at AECOM. His main passion is water scarcity and water sustainability in the MENA region. He runs the blog Water Source that addresses water problems and sustainability. Amir has worked with Emirates Environmental Group on various environmental issues including water scarcity.
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