Satellites help fight drought in Ethiopia

With Ethiopia threatened by a potentially devastating new drought, UNICEF has ventured into an area for which the Children’s Fund isn’t generally known: satellite remote sensing. The technology is being used to help herders drill the wells they need to keep their thirsty flocks alive.

More than 70 percent of the wells drilled in the arid Afar region of northeastern Ethiopia have gone dry during the latest drought because they weren’t dug in the most useful place. The new technology will make sure that wells are best situated to take advantage of available fresh water.

The world focused on the Horn of Africa during the 2011 drought crisis that affected 13 million people across Ethiopia, Somalia and Kenya, but four years later, attention has dissipated, and a lack of seasonal rain means a new drought looms.

Ethiopia is a victim of its geographic and climactic location and prone to periodic droughts, but experts are predicting the latest one could be the worst in decades—producing devastating effects on food security in the country for the next two years.

One of the most affected areas in the country is the Afar Region in the Great Rift Valley where daily temperatures can exceed 44 degrees Celsius and there is less than 300mm of rain annually.

Most of the Afar region’s population of 1.5 million people survive mainly on herding (92 percent), and the animals need water. Water the existing wells aren’t providing.

This is where satellites come in. UNICEF analyzes information the satellites provide on ground vegetation, topology and morphology, combined with hydro-geological information on the region, and pinpoints the best place to drill wells.

Salt farm in Ethiopia.
©UNICEF Ethiopia/2015/SewunetA salt farm in Ethiopia. More than 1.2 million Ethiopians are affected by water shortages in September 2015. More than 50 percent of this population are women and children.

Just 84 km north of Afar’s capital of Samera, UNICEF put its remote sensing satellite plan into action. The government identified the district of Elidar as a priority location—shepherds head there due to water shortages elsewhere.

Currently, people rely on expensive commercial trucks to haul in water because most of the water found by digging wells is very salty. Deep underground, however, lies fresh water, and the UNICEF-directed remote sensing investigations have found just the right places to drill boreholes down between 250 and 300 metres.

Three boreholes will be drilled by end December 2015. These wells will provide more than 100,000 people with access to safe water. A contract has been awarded to a private drilling contractor at a cost of 9 million birr (US$ 433,264), and UNICEF will supervise the works with the local water bureau.

As a water engineer, being able to put science into action in this manner and help communities and their livestock is very rewarding for me.

UNICEF is providing high end scientific and technological support to access deep groundwater in a geologically complex area of Ethiopia, reducing dependence on expensive trucked in water.

“This essential work by UNICEF is providing lifesaving water to needy children and women in this pastoralist area of Afar,” said UNICEF Representative to Ethiopia Ms. Gillian Mellsop, during visit to the site with State Minister of Water, Irrigation and Energy Dr. Kebede Gerba.

“Previously this population was dependent on the unsustainable and costly water from water trucks. Now, women and children will have access to water year round,” she added.

 

Dr. Samuel Godfrey is Chief of WASH for UNICEF Ethiopia, and has a PhD and MSc in Civil Engineering and Water and Waste Engineering.

 

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Comments:

  1. Well done. I think this technology willl be very useful for the small island volcanic states where the hydrogeological conditionns are too complicated as my contry Comoros.Here the fresh water and salt water are on the frigile balance.

    Best regards

  2. This is certainly promising and I hope that other drought prone countries like Yemen can benefit from the technology.

  3. In Ethiopia, Groundwater has been proven resources to support emergency water supply, urban water supply, livestock watering, and more recently, the areas affected by drought brought about a huge demand for development of groundwater resources. However, the challenge with its development relates to the problems with limitations in hydrogeological investigations as well as drilling operations, combined with the complex nature of the Ethiopian geology which results cases of drilling failures and associated loses.

    In the process of tackling the problems and improve drilling success rates, The UNICEF’ s effort to increase drilling success rates through improved study and investigation methods, such as the application of remote sensing techniques has paramount importance. Recently, UNICEF has entered into a partnership for the applications of remote sensing on 9 selected draught affected woredas within Somali, Afar, Oromia and SNNPR regions. This approach should be encourages and expanded to a larger scale over the country, especially for shallow ground water systems where the remote sensing methods yield at most, as well as for deep groundwater areas where it can be used as supplementary and by adaptations techniques in combinations with conventional hydrogeological methods.

    The role of EU-JRC could be supporting in providing the relevant satellite data from different sources as well processing of the raw data for derivations of different input thematic layers/parameters, used for the overlay analysis in the groundwater studies as well as provide trainings/capacity building on the subject matter.

    UNICEF Addis office would like to express its thanks to the EU-JRC, for their establishment of a remote sensing partnership with UNICEF and providing the un-reserved support so far, which we believe to be strengthen and extended further in the future.