"Given water shortages, we do not have time to search for water with only classical methods," said Jean Bertrand, president of France-based IRIS Instruments, which manufactures the equipment and has trained experts working in Chad to use this technology to find water.
Methods used to search for groundwater typically look at how rocks react to radar and electrical currents, which could lead to false readings of the presence of water, said Bertrand.
"This [magnetic resonance sounding] is direct prospecting, whereas with other geophysical studies we get indirect signs on whether or not there is water. Here, a sign of water means there is water, which means less unnecessary drilling," said Pierre Michel Vincent, a hydrologist who recently worked with the Ministry of Water and the UN Refugee Agency (UNHCR) in Chad.
"Only one out of three boreholes drilled in Chad produces water," he told IRIN. Magnetic resonance sounding sends electrical currents through the earth in search of hydrogen atoms, which gives a reading of how much water rocks hold. "This technique identifies where water is more quickly than traditional geophysical studies."
Refugees who have fled Sudan and Central African Republic constitute 35 percent of eastern Chad`s estimated 700,000 population, according to the most recent census. Hydrologist Vincent said there was not enough information on half of the 4,000 recorded water points in the area to know if they still produced water.
People from local communities as well as refugees struggle to find half the recommended 15 to 20 litres of water per day for drinking, cooking and bathing, and many were only able to secure six litres a day on average, said UNHCR.
"There is not enough water to provide for the expanded population - we could drill 500 more wells now and still not have enough water," Vincent told IRIN in October 2009.
Erratic and insufficient rainfall in 2009 meant Chad produced 34 percent less food than in 2008, which has wiped out livestock and placed two million at risk of hunger in the country, the government noted.