Engineering water wisdom: how UAE innovators are reshaping desert agriculture

Two pioneering companies are field-testing transformative solutions that dramatically reduce water consumption in greenhouse farming and crop irrigation, harnessing engineered climate systems and soil science to address one of the Emirates' most pressing resource challenges.

Water scarcity shapes every dimension of life in the Arabian Peninsula, and nowhere is this more acute than in agriculture, where irrigation accounts for the vast majority of freshwater use. The Mohamed bin Zayed Water Initiative is now testing finalist solutions from its Al Miyah Challenge for Agriculture that fundamentally reimagine how greenhouses and crop fields can thrive in desert conditions whilst consuming a fraction of the water upon which they have traditionally depended.

CRETA Group has engineered a greenhouse system that treats the entire structure as an integrated climate-management organism rather than a space requiring uniform cooling. Its proprietary design combines underground heat exchange, orchestrated airflow patterns, differential-pressure management and passive reduction of solar heat gains within a dual-shell architecture. The system prioritises the microclimate immediately surrounding crops, allowing air to be pre-conditioned before it reaches plants through a coordinated interplay of cooling, thermal storage in the ground beneath the greenhouse, and controlled ventilation. An Al Ain pilot currently testing adaptations for desert conditions where summer temperatures approach 50°C has recorded air-temperature reductions of approximately 12 to 15 degrees Celsius compared with conventional systems, whilst cooling-related electricity consumption has fallen approximately 30 to 40% below traditional approaches. The system is engineered to operate at an electrical demand of around 7 to 8 kilowatts.

Most significantly, the design targets maintaining crop-zone temperatures of 28 to 32°C whilst reducing cooling-water consumption by 85 to 90% compared with conventional fan-and-pad systems. In Mediterranean and milder climates already tested, the installation has operated without evaporative-cooling water in summer or fuel-fired heating in winter. The system can be retrofitted into existing greenhouse structures or incorporated during new construction. Whilst initial installation costs run approximately 20 to 30% higher than comparable conventional systems depending on size and ground conditions, this is offset by substantially lower operating and maintenance costs, with underground infrastructure designed for a service life exceeding 20 years.

Raincatcher Technologies has pursued a fundamentally different approach through soil science. The Dubai-based company has developed a biodegradable soil improver combining superabsorbent polymers and nutrients that is injected near crop roots to store and gradually release irrigation water and rainwater as soil dries. In sandy desert soils, water losses through drainage below the root zone or surface evaporation can reach 90%, rendering conventional irrigation inefficient. Raincatcher’s formulation absorbs several hundred times its own weight in water, creating gel pockets that attract roots and encourage deeper, denser root systems. The company uses dedicated injection tools and conducts soil, climate and crop analysis to determine optimal dosage and placement depth, with real-time moisture monitoring guiding irrigation decisions.

The company received the Solar Impulse Foundation’s Efficient Solution Label in 2023. A published trial at the International Center for Biosaline Agriculture in Dubai involving 27 date palms achieved an 85% water saving, with treated palms irrigated once every seven days compared with daily irrigation for untreated plants. In a sweet-corn evaluation at Silal Innovation Oasis in Al Ain, water use was approximately 20 to 25% lower than untreated plots. The solution works with existing irrigation systems without requiring crop changes or new infrastructure, and its potassium-based formulation adds no sodium to soils exposed to salinity whilst supplying potassium to plants as it degrades.

Both solutions embody the Innovation that as we reported in the institution’s evolving strategic direction, the Emirates’ leadership continues to champion for addressing the nation’s most fundamental challenges.

What it means for Abu Dhabi

The Al Miyah Challenge represents a critical investment in the future of Emirati agriculture at a moment when water security and agricultural self-sufficiency are intertwined national priorities. By reducing cooling-water consumption by up to 90% in greenhouses and achieving water savings of 85% in irrigated crops, these innovations directly address the extraordinary demands that traditional agricultural methods place on the Emirates’ limited freshwater resources. The technologies are designed to integrate with existing farm infrastructure, enabling rapid adoption without requiring farmers to abandon established practices or undertake expensive reconversion.

The economic implications are equally compelling. Whilst initial capital costs are higher for the CRETA system, substantially lower operating and maintenance expenses combined with reduced water and energy bills create financial incentives that align environmental stewardship with profitability. For Raincatcher Technologies, annual costs per date palm are estimated at approximately US$7, with recovery anticipated through water savings and improved yields under water stress. These solutions transform water conservation from a constraint into an opportunity, supporting the Emirates’ vision of sustainable agricultural production in one of the world’s most challenging climates.

Source: UAE News Agency (WAM)