In arid places like Tilcara, in the Quebrada de Humahuaca, Jujuy, groundwater resserves play a crucial role. Credit: Juan Moseinco/IPS

By Marcela Valente
BUENOS AIRES, Oct 10 2013 (IPS)

Half of Argentina is supplied with water by invisible underground aquifers, which are crucial in the country’s arid and semi-arid regions, experts say. But Tierramérica discovered that nobody – not even the government – has any accurate scientific data on these groundwater reserves.

Beyond the Guaraní Aquifer, the vast underground body of fresh water shared by Argentina, Brazil, Paraguay and Uruguay, little is known about the groundwater reserves of this country with a wealth of highly visible water resources, including the rivers of the Rio de la Plata Basin, Iguazú Falls, and the majestic glaciers of Patagonia.

The Guaraní Aquifer became well known due to a monitoring plan funded by the Global Environment Facility (GEF), “but in Argentina there are other aquifers that are exploited much more intensively” and support regional economies, said Ofelia Tujchneider, a geologist from the National University of the Littoral.

In terms of the quantity and quality of its water, the most important is the Puelches aquifer, which lies beneath part of the province of Buenos Aires, in eastern Argentina, Córdoba in the centre of the country, and Santa Fe in the northeast.

According to the Environmental Atlas of Buenos Aires, the depth of the Puelches aquifer ranges from 40 to 120 metres, and it supplies 9,900 cubic metres of water a day. It is located between the Pampeano aquifer, which is closer to the surface, and the deeper Paraná aquifer, whose water is salty and used primarily by industry.

In the eastern region of the country are the Ituzaingó, Salto and Salto Chico aquifers. And in the province of Neuquén, in the western part of the southern region of Patagonia, groundwater reserves provide water for the oil, gas and mining industries, explained Mario Hernández, a hydrogeologist from the National University of La Plata.

There are also aquifers in the southern province of Santa Cruz. And in the northwest, an arid region with little rainfall, these groundwater deposits are recharged by river water.

In the western provinces of Mendoza and San Juan, water is supplied primarily by underground reserves. As a result, the aquifers here are studied and protected, and subject to regular monitoring, because the local wine industry depends on the water they provide.

“Groundwater resources play a key role in arid and semi-arid regions. If it weren’t for the aquifers, massive engineering works would be needed to supply water for irrigation or residential use,” Tujchneider told Tierramérica.

Groundwater is abundant, of good quality, tends to be better protected from pollution, and can be found in large volumes even beneath arid, desertified or desert areas.

The Rio de la Plata Basin encompasses 85 percent of the country’s surface water resources, according to the book “Agua: Panorama general en Argentina” (Water: A general overview in Argentina), published by the non-governmental organisation Green Cross. But this network of rivers only extends to 33 percent of the country, in the northeast, and flows into the large estuary that gives the basin its name and empties into the Atlantic Ocean.

Much of the rest of the country is arid or semi-arid, with areas where the available water supply is less than 1,000 cubic metres per person per year, the measure used to define water scarcity by the United Nations Development Programme.

In 2010, 82.6 percent of the population, currently estimated at 41 million, was served by the drinking water supply system.

According to Hernández, half of the country is supplied with water by aquifers, which provide water for the irrigation of cereal and grain crops as well as the industrial and mining sectors and a large share of household consumption.

However, he stressed to Tierramérica, there are no accurate measurements or statistics on Argentina’s groundwater reserves.

The only available data is from a 2000 World Bank report, which estimated that groundwater resources account for 35 percent of the water used for irrigation, livestock farming, industry and household consumption.

Tujchneider believes that the current level of groundwater use is “quite a lot higher than 35 percent,” particularly because of an increase in irrigation and in rice production in recent years.

However, because of the lack of recognition of the immense value of this resource, there is a danger that groundwater reserves can become contaminated with agrochemicals, industrial waste or wastewater, or that they will be exploited beyond their recharge capacity.

The water stored in an aquifer may have been there for a very long time. If it is extracted without limits, it could run out, as is already happening in Mendoza, warned Tujchneider.

Hernández noted that aquifers are “more protected from contamination than surface water” but they are also “more fragile, and once they are contaminated, they are much more difficult to clean up than rivers.”

“There is a lack of knowledge. They are not valued, and they don’t teach about them in schools. Children think that water comes from a tap,” he commented.

The Federal National Groundwater Plan aims to put an end to this lack of visibility, said its coordinator, Jorge Santa Cruz, who has a PhD in natural sciences and headed up the studies on the Guaraní Aquifer. The first step will be the organisation of diagnostic workshops in the country’s different provinces, he told Tierramérica.

The objectives of the plan, which is being overseen by the Undersecretariat of Water Resources, include the development of a database of hydrogeological data so that aquifers are viewed as reserves of a resource that is “known, predictable and reliable,” even if it cannot be seen.

* This story was originally published by Latin American newspapers that are part of the Tierramérica network.

How much water does it take to turn on a light? It took 10,000 litres to make your jeans. Another three big bathtubs of water was needed for your two-eggs-toast-coffee breakfast this morning.

Piped water has made life easier for this Laotian boy, who no longer has to help his parents fetch water from afar. Up to 1.7 billion people face scarcity. Credit: Vannaphone Sitthirath/IPS

We are surrounded by an unseen world of water: furniture, houses, cars, roads, buildings – practically everything we use and make needs water.

“There is no way to generate energy without water,” said Zafar Adeel, co-chair of the UN-Water Task Force on Water Security and director of the Institute for Water, Environment and Health in Canada.

Even solar panels need regular washing to perform well. Wind energy might be an exception, Adeel told IPS from a water conference in Beijing being held during World Water Week.

There is growing recognition that peak oil is nowhere near as important as peak water because there is no substitute for water. The growing shortage of water — 1.2 to 1.7 billion people face scarcity — has alarmed many. Water has been identified as an “urgent security issue”, by a group that last year included both former U.S. Secretary of State Hillary Clinton and the InterAction Council, an association of 37 former heads of state and government.

It’s important that “water security” be recognised by the U.N. Security Council as either as a trigger, a potential target, or a contributing factor to insecurity and potential conflict in many parts of the world, said Adeel.

Defining exactly what the term “water security” means has been challenging, but UN-Water, the United Nations’ inter-agency coordination mechanism for all water-related issues, now has a working definition.

They have defined water security as: “The capacity of a population to safeguard sustainable access to adequate quantities of and acceptable quality water for sustaining livelihoods, human well-being, and socio-economic development, for ensuring protection against water-borne pollution and water-related disasters, and for preserving ecosystems in a climate of peace and political stability.”

The definition was released Friday on World Water Day along with an analytical brief “Water Security and the Global Water Agenda“.

“Water fits within this broader definition of security — embracing political, health, economic, personal, food, energy, environmental and other concerns — and acts as a central link between them,”says Michel Jarraud, Chair of UN-Water and secretary-general of the World Meteorological Organization (WMO).

It is important to note that conflicts over water are rare. “Historically there hasn’t been a war between nations over water,” said Harriet Bigas, a co-author of the brief and colleague of Adeel at the Institute for Water, Environment and Health.

Water issues do create friction between nations and have led to local internal conflicts, she said in an interview.

Driven largely by water and food shortages linked to drought in the Horn of Africa, almost 185,000 Somalis fled to neighbouring countries in 2011. In Sudan, violence broke out in March 2012 in the Jamam refugee camp where large numbers of people faced serious water scarcity. And in South Sudan, entire communities were forced to leave due to scarce water resources as a result of conflict in 2012.

Water insecurity can lead to cascading political, social, economic and environmental consequences, she said.

However, the norm is for nations and regional partners to work out water-sharing agreements, offering important opportunities for dialogue amongst traditional enemies.

“Water is a greater pathway to peace than conflict,” writes noted international water expert Aaron Wolf of Oregon State University.

Even when nations are at war, they negotiate water-sharing agreements, Wolf says. Vietnam, Cambodia, and Laos continued the successful Mekong Committee to manage the Mekong River even during the Vietnam war.

In 2010 Brazil, Paraguay, Uruguay and Argentina signed an agreement to share the management of the Guaraní Aquifer, which extends over more than one million sq km. A population of 15 million today relies on the aquifer because surface water, though abundant, is often polluted, the UN-Water brief noted.

There’s also rising international support for adopting “universal water security” as one of the Sustainable Development Goals (SDGs) — a set of mid-term global objectives to succeed the U.N.’s Millennium Development Goals, agreed by world leaders in 2000 for achievement by 2015.

“Water encompasses all aspects of development. We’re hopeful water security will be one of the main SDGs,” said Adeel.

Water, food and energy are sides of the same triangle – shrink one side and it affects the other two, he said.

An SDG for water security should include targets and indicators that reflect this. It needs to specific to various countries’ needs and indicate what resources will be needed to achieve water security. “It’s important to explicit state how each country can get there.”

The draft SDGs will be presented at the opening of the U.N. General Assembly this September.

The biggest challenge in achieving universal water security is not money or technology but human institutions, said Bigas. Simply getting government departments in the same country to coordinate on water issues is “an enormous challenge”.