page_title: Emni Ankelalu
section_title: Hydrology
hierarchical_section_title: Emni Ankelalu / Geography / Hydrology
caption_attribution_description: English: Giba dam under construction
context_page_description: Emni Ankelalu is a tabia or municipality in the Dogu'a Tembien district of the Tigray Region of Ethiopia. The tabia centre is in Mitslal Afras village, located approximately 20 km to the east of the woreda town Hagere Selam.
context_section_description: In this area with rains that last only for a couple of months per year, the only permanent water is in Giba river. There are hardly any springs. Hence, reservoirs of different sizes allow harvesting runoff from the rainy season for further use in the dry season. 
  There are traditional surface water harvesting ponds, particularly in places without permanent springs, called rahaya, and also horoyo, household ponds, recently constructed through campaigns.
  A major change is the construction of Lake Giba, a 350 million m³ reservoir on the Giba river that will occupy the whole lower eastern side of the tabia. The reservoir is  mainly intended to provide water to Mekelle. The lithology of the dam building site is Antalo Limestone. Part of its water is anticipated to be lost through seepage; the positive side-effect is that this will contribute to groundwater recharge and river baseflow in the downstream areas, which largely belong to tabias Addi Azmera and Debre Nazret. The lower villages of Emni Ankelalu will see their environment changed from dryland to lakeshore villages.
caption: Giba dam building site in 2019
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