Skip to content Skip to Search
Skip navigation

Rain harvesting could help Dubai offset a stormy future

Rain falling on paved surfaces such as roads has nowhere to go, but retrofitting roads to allow rainwater harvesting could help, some experts say Reuters
Rain falling on paved surfaces such as roads has nowhere to go, but retrofitting roads to allow rainwater harvesting could help, some experts say
  • Reuse of water is essential
  • ‘Sponge City’ scheme planned
  • Developers already harvest rain

If last week’s floods made improving drainage a necessity for Dubai, the reward might come in the form of more natural water resources, provided the emirate can boost rain harvesting efforts, industry observers tell AGBI.

“The main idea for countries, especially in drier areas, is to try to reuse water as much as possible,” says Ronny Berndtsson, water resources engineering professor at the Centre for Advanced Middle Eastern Studies at Lund University in Sweden.

UAE sustainability company Dake Rechsand says it can help municipalities to retrofit roads, sidewalks and other surfaces with permeable materials. Rainwater can thus seep into the ground and flow into decentralised storage tanks that keep it clean without electricity or chemicals. 

Chandra Dake, the company’s founder, tells AGBI he is in talks with the Dubai government to implement two “Sponge City” pilot projects.

“A sponge has two functions: it can absorb water … and then you can squeeze it in a bucket,” Dake says.

“That’s exactly what our system does. Every drop of water which falls on it can be absorbed and then that water can be taken and used for cleaning the roads or irrigating the plants.” 

Approximate calculations suggest each millimetre of rain produces one litre of water for each square metre of a building’s roof.

The National Centre of Meteorology says the country’s hardest-hit areas recorded upwards of 254mm of rain during the storm’s 24 hours – more than the national average annual rainfall of 140 to 200mm.

A study by researchers at the NCM published in the journal Nature in January predicts the UAE will experience increases in mean annual rainfall of 15 to 30 percent this century.

As part of larger water-management efforts, Dubai real estate development and hospitality company Five Holdings has embraced rainwater harvesting.

Director of sustainability David Shepley says that at its Jumeirah Village location, a catchment basin on the roof and fifth floor podium connects a line to the hotel’s greywater system. At Five Palm Jumeirah, meanwhile, it captures rainwater from a basin in the parking area.

“The rainwater harvesting lines integrate with our greywater recovery networks, which service the hotel’s irrigation and cleaning operation,” says Shepley.

He tells AGBI the Five Jumeirah Village system captured 185,000 litres of water during the storm, while Five Palm Jumeirah recovered 390,000 litres.

“This puts into perspective both the severity of the climate event and the impact of having a system in place to capitalise on the water collection opportunity, especially in the UAE’s water stressed region.”

While rainfall in Dubai and the UAE is set to increase in the coming decades, it is unlikely to become on par with that of non-desert countries.

That raises the question of whether investments in rainwater harvesting makes business sense here.

“Yes, it is worth it,” says Shepley. “The marginal investment needed to install a rainwater connection line outweighs the potential of the loss of water or its devastating effects.”

On Wednesday the UAE government announced it would allocate AED 2 billion ($544 million) towards fixing up damaged homes. In the immediate aftermath of the storm, President Sheikh Mohamed bin Zayed Al Nahyan ordered a review of infrastructure nationwide.

Latest articles

Russians Turkey Istanbul Bridge

Russians rush from Turkey as costs and restrictions bite

Rising costs, increased difficulties in obtaining residency permits and tighter enforcement of restrictions on the number of foreign nationals who can live in popular regions are prompting an exodus of Russian citizens from Turkey.  The number of Russian nationals holding Turkish residence permits has plunged to just over 96,000 as of May 16, down from […]

Saudi Comac Dongfeng He Bandar al-Khorayef

Chinese planemaker banned by US woos Saudi airlines

The boss of a leading Chinese planemaker arrived in Saudi Arabia this week to pitch his aircraft just as the United States said it was close to finalising a defence agreement with Riyadh that is meant to limit its trade links with China.  Dongfeng He, chairman of Comac, the Commercial Aircraft Corporation of China, wants […]

The UAE's minister of industry and advanced technology, Sultan Al Jaber, left, met Karl Nehammer, Chancellor of Austria, for talks on trade

Austrian finance unicorn to open in UAE

Austria’s first unicorn has announced plans to set up in Dubai, as officials from the UAE hold top-level talks in Vienna to build on a 22 percent increase in bilateral trade last year A unicorn is a startup company valued at more than $1 billion that is privately owned and not listed on a share […]