The energy required to power desalination would drive up the price of water, and consume more non-renewable energy, the price of which is rapidly being felt by South African electricity users. Water Rhapsody provides a means to save up to 90% of your municipal water bill with our water conservation systems. here follows the article in Cape Times today

By Melanie Gosling Environment Affairs Cape Times

Capetonians could be drinking desalinated seawater in four years’ time when our growing demand for water will have exhausted current supplies.

And because desalination is expensive, the cost of Cape Town’s water will increase.

This emerged at a pre-budget briefing yesterday where Water and Environment Affairs Minister Buyelwa Sonjica said her department was “forging ahead with unconventional supplies” of water, which included desalination of sea water in coastal towns.

“My view is that desalination must be seen as one of the sources for water supply… We have a coastline of 3 000km. We don’t have enough water and we are facing climate change. “So in future this is a technology South Africa will need,” Sonjica said.

The Berg River was the last available river in the Western Cape that could be dammed to provide water for the city.

But the Berg River Dam, the newest of the province’s dams, will meet Cape Town’s growing water demand only until 2014.

Asked what the plans were to augment Cape Town’s supply after 2014, Sonjica said this would be addressed in the national water review strategy.

Sonjica’s deputy director-general, Cornelius Ruiters, added: “One of our options for increasing supply to Cape Town is desalination. This will increase the cost of water, but is the only viable option.”

He said Water Affairs was in discussion with the City of Cape Town about the best option for desalination plants to supply the city, “and the cost implication for the City of Cape Town”.

Ruiters said the department was also looking at using water from Voelvlei Dam, and using more water from the Breede River.

“Using underground water from the Table Mountain aquifer is also an option,” he said.

Sonjica said studies suggested that South Africa was using less than 30 percent of ground water resources.

Referring to the dedicated environmental courts that her department wanted to establish to prosecute environmental crimes, Sonjica said they would begin running as a pilot project next month.

“Four in total have been approved for now,” she said. One of these would be in the Western Cape.

Water Rhapsody is rapidly increasing its’ footprint around South Africa, with coverage in six of the nine provinces of South Africa. With the first dealers opening in the Western Cape, the Water Rhapsody network has spread to Gauteng, KZN, Eastern Cape and Mpumalanga. This week negotiations began to secure a dealer in the Limpopo province and this is expected to come on stream later in the year. Limited opportunities still exist in all the provinces for ecopreneurs to open their own businesses in Water Conservation. “The demand has been far greater than we ever expected” says Charles Bryant who hails the water business as a sunrise industry. Demand for grey water systems and rainwater harvesting systems is growing in leaps and bounds as the South African public come to realise that there are no more opportunities to dam any more rivers; most of which no longer reach the sea.

A new proposed law to go into effect in 2011 could have Los Angeles residents changing their habits when it comes to rainfall. Rather than just complaining that there’s some strange wet substance falling from the sky, all new homes, large developments, and some redevelopment projects will start to appreciate those few rainy days by harvesting and redirecting rainfall. The Department of Public Works has unanimously approved the new ordinance that will require the use of several different methods to capture, reuse or redirect runoff from 3/4 inch or heavier rainstorms. Does this mean LA is becoming water wise?

Ecolocalizer reports, “Not only will Los Angeles’ new ordinance help to recycle our planet’s most precious resource, it will also help to keep polluted urban water out of our increasingly acidic seas. The Board of Public Works Commissioner Paula Daniels, who initially drafted the ordinance last July, explained that the new requirements would prevent over 104 million gallons of polluted urban runoff from ending up in the ocean.”

This is very true, but this aspect of rainwater harvesting isn’t as beneficial as making other, much larger and more expensive yet important changes – making LA’s surfaces more permeable so that rainwater can filter back down to the groundwater table. One of the main reasons polluted water heads to the oceans is that it lands on concrete and pavement, then rushes straight into storm drains that lead to the ocean. It never has a chance to trickle down and replenish the groundwater supply. Making the city surfaces more permeable is an infrastructural change that has to be considered as seriously as rainwater harvesting.

Thankfully this isn’t being ignored in the proposed law:

“In addition to encouraging the use of rain storage tanks, builders would be required to use other low-cost and sensible water management methods; these include simple measures, like diverting rainfall to gardens, constructed infiltration swales, mulch and permeable pavement, all of which will help to sustainably direct the rain directly where it falls. Any builders who are unable to manage 100% of a project’s runoff on-site would be required to pay a penalty of $13 a gallon for the water that is not safely redirected. This fee will help to fund sustainable off-site water management projects.”

WATCH VIDEO: Renovation Nation: Harvesting Rainwater

Not everyone is ecstatic about the idea. The LA Times reports that some building projects in areas where the soil is high in clay are going to have a tough time with the 100% retention rule. A one-acre building on ground where runoff could not be managed on site could see fees as high as $238,000.

“The Building Industry Assn. is supportive of the concept of low-impact development and has invested a lot of time and energy in educating our members on those techniques and advancing those technologies,” said Holly Schroeder, executive officer of the L.A.-Ventura County chapter of the association. “But when we now start talking about using LIDs as a regulatory tool, we need to make sure we devise a regulation that can be implemented successfully.”

However, there are solutions for every problem – even clay-dense soil.

Los Angeles could also benefit from improved water management in the first place – all those lawns and swimming pools aren’t doing much to help alleviate water woes. But going the route of rainwater harvesting and diversion is a much better solution than launching a new energy intensive desalination plant. We’re hoping the law goes though, and it sees success.
www.Treehugger.com

by Jaymi Heimbuch, San Francisco, California