Cities in Deserts and the Sandstorm Problem: Anthropogenic Challenge and Adaptation

Introduction: Urbanization in Extreme Conditions

The creation and development of large cities in arid (desert) regions are among the most ambitious and risky projects of humanity. These agglomerations, such as Dubai (United Arab Emirates), Riyadh (Saudi Arabia), Las Vegas (United States), Cairo (Egypt), exist under conditions of chronic water scarcity, extreme temperatures, and the threat of sandstorms. Sandstorms are not just a meteorological phenomenon but a complex ecological and social problem exacerbated by anthropogenic activities. Their study lies at the intersection of climatology, geomorphology, urban planning, and social hygiene.

Nature and Types of Sandstorms

A sandstorm is the transport of massive amounts of fine particles (sand, dust, soil) by strong winds. There are:

• Dust storms: Transport of small particles (less than 0.063 mm) over thousands of kilometers. Characteristic of the Sahara, Gobi.

• Sandstorms: Transport of larger particles (0.063–2 mm) over shorter distances, in the lower atmosphere layer.

Their formation is facilitated by the absence of vegetation cover, dry soil, strong convective flows, and certain terrain. The key anthropogenic factor is desertification, caused by overgrazing, deforestation, irrational water use, and excessive land reclamation. Cities themselves become drivers of desertification, consuming resources and altering the landscape.

Impact of Sandstorms on Cities and Population

1. Health:

   • Respiratory diseases: Particles PM10 and PM2.5 penetrate the lungs, exacerbating asthma, bronchitis, causing silicosis. Long-term exposure is associated with increased cardiovascular and cancer mortality.

   • Infections: Dust can carry spores of fungi, bacteria, allergens.

   • Psychological effect: Constant storms lead to stress, claustrophobia, seasonal affective disorders.

2. Economy and Infrastructure:

   • Transport collapse: Zero visibility stops air and road traffic. Example: In May 2022, a sandstorm in Iraq led to the closure of airports and deaths in road accidents.

   • Equipment wear: Abrasive particles damage engines, mechanisms, solar panels (critical for cities using solar energy).

   • Energy: Contamination of photovoltaic cells reduces electricity generation by 80-90%.

   • Agriculture: Destruction of crops, salinization of soils.

3. Urban Planning Issues:

   • Burial of drainage systems, roads, buildings.

   • Reduction in the efficiency of air conditioning systems, vital in deserts.

   • Deterioration of water quality in reservoirs.

Adaptation and Mitigation Strategies

Desert cities develop comprehensive measures:

1. Monitoring and forecasting: Development of early warning systems based on satellite data (NASA's MODIS) and weather stations. SMS alerts for the population are in effect in Kuwait and the UAE.

2. Urban planning and engineering solutions:

   • Windbreaks and barriers: Planting drought-resistant trees (tamarisk, acacia) and shrubs on the outskirts of cities. In China, a "Great Green Wall" is created around desert cities in the Taklamakan Desert.

   • Architectural adaptation: Orientation of buildings, aerodynamic shapes, sealed window systems, forced ventilation systems with HEPA filters.

   • Green infrastructure within the city: Parks, vertical greening, "green roofs" not only improve the microclimate but also trap dust.

3. Ecological restoration (fighting desertification):

   • Sand fixation: Use of chemical fixatives (polymer emulsions) or biological methods (seeding grasses).

   • Rational water use: Drip irrigation for landscaping, use of treated wastewater (as in Dubai).

   • Prohibition of land reclamation and overgrazing.

4. Behavioral and social measures:

   • Educational campaigns on behavior during storms (staying indoors, using masks and respirators).

   • Development of telemedicine and air purification systems in public places.

Cases and Interesting Facts

• Dubai (United Arab Emirates): The city spends billions on desalinating water for irrigating numerous parks and golf courses, creating "oases" that can locally influence the microclimate, but exacerbate the problem at the regional level due to high energy consumption. Monitoring and extensive greening are used to combat storms.

• Beijing (China): Although not in a desert, suffers from powerful dust storms from the Gobi Desert. The authorities are implementing the grandiose project of the "Green Chinese Wall" — forest belts thousands of kilometers long to control desertification. This is the largest geoin engineering project in the world.

• Las Vegas (United States): Demonstrates the path of water conservation in the Mojave Desert. The city pays residents for replacing green lawns with gravel landscapes, implements high-tech water purification and recycling technologies.

• The phenomenon of "blood rain": In Europe, red-colored precipitation sometimes falls — this is the result of the transport of dust from the Sahara, which crosses the Mediterranean Sea. This is a vivid example of the transboundary nature of the problem.

Conclusion: Sustainability as an Imperative

Desert cities are laboratories for human survival in the face of intensifying climate change. Sandstorms act as a harsh stress test for their infrastructure, economy, and health systems. Successful adaptation requires giving up the illusion of complete control over the environment in favor of a strategy of sustainable co-adaptation. This means:

1. Acknowledgment of the connection between urban development and desertification of peripheral territories.

2. Investment not only in engineering protection but also in ecological restoration.

3. Priority of resource-saving technologies (water, energy).

4. Development of social capital and rapid response systems.

The future of these cities depends on whether they can transform from enclaves of consumption into ecological hub-ports that mitigate, rather than exacerbate, the arid environment. In this context, the sandstorm is not only a threat but also a reminder of the fragility of anthropogenic landscapes in the face of eternal forces of nature.
© elib.ng

Permanent link to this publication: