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Addi Shihu
Addi Shihu is a reservoir located in the Atsbi Wenberta ''woreda'' of the Tigray Region in Ethiopia. The earthen dam that holds the reservoir was built in 1997 by SAERT. Dam characteristics * Dam height: 10.8 metres * Dam crest length: 301 metres Capacity * Original capacity: 1 million m³ * Reservoir area: 36 ha Irrigation * Designed irrigated area: 40 ha * Actual irrigated area in 2002: 13 ha Environment The catchment of the reservoir is 9.4 km² large. The reservoir suffers from rapid siltation. Part of the water that could be used for irrigation is lost through seepage; the positive side-effect is that this contributes to groundwater recharge. Homonymous places The town of Addi Shihu, in Alaje Alaje () is a District of Ethiopia, or ''woreda'', in the Tigray Region of Ethiopia. Part of the Debubawi Zone, Alaje is bordered on the south by Endamehoni, on the southwest by the Amhara Region, on the north by Debub Misraqawi (Southeastern) Z ... woreda is located mor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ethiopia
Ethiopia, , om, Itiyoophiyaa, so, Itoobiya, ti, ኢትዮጵያ, Ítiyop'iya, aa, Itiyoppiya officially the Federal Democratic Republic of Ethiopia, is a landlocked country in the Horn of Africa. It shares borders with Eritrea to the north, Djibouti to the northeast, Somalia to the east and northeast, Kenya to the south, South Sudan to the west, and Sudan to the northwest. Ethiopia has a total area of . As of 2022, it is home to around 113.5 million inhabitants, making it the 13th-most populous country in the world and the 2nd-most populous in Africa after Nigeria. The national capital and largest city, Addis Ababa, lies several kilometres west of the East African Rift that splits the country into the African and Somali tectonic plates. Anatomically modern humans emerged from modern-day Ethiopia and set out to the Near East and elsewhere in the Middle Paleolithic period. Southwestern Ethiopia has been proposed as a possible homeland of the Afroasiatic langua ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atsbi
Atsbi (Ge'ez: ኣጽቢ) (officially known as Atsbi Endaselase Ge'ez: ኣጽቢ እንዳስላሴ ) is a town in Tigray Region, Tigray, Ethiopia. Located in the Misraqawi Zone, Misraqawi (Eastern) Zone of the Tigray Region, about 50 kilometers northeast of Qwiha, this town has a latitude and longitude of with an elevation of 2630 meters above sea level. It is the administrative center of Atsbi Wenberta woreda. History Mordechai Abir notes that, along with Ficho, Atsbi was an important center of trade in the blocks of salt called ''amoleh'', which was used as late as the 20th century as currency. Both settlements lay on the borders of the former provinces of Agame and Enderta Province, Enderta at the edge of the Ethiopian highlands. Here caravans brought thousands of ''amolahs'' from the salt deposits in the Afar Depression, which were then sold to traders for about 100 to one Maria Theresa Thaler; these merchants then transported the blocks west to Adwa, Axum and Gondar, and sou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reservoir
A reservoir (; from French ''réservoir'' ) is an enlarged lake behind a dam. Such a dam may be either artificial, built to store fresh water or it may be a natural formation. Reservoirs can be created in a number of ways, including controlling a watercourse that drains an existing body of water, interrupting a watercourse to form an embayment within it, through excavation, or building any number of retaining walls or levees. In other contexts, "reservoirs" may refer to storage spaces for various fluids; they may hold liquids or gasses, including hydrocarbons. ''Tank reservoirs'' store these in ground-level, elevated, or buried tanks. Tank reservoirs for water are also called cisterns. Most underground reservoirs are used to store liquids, principally either water or petroleum. Types Dammed valleys Dammed reservoirs are artificial lakes created and controlled by a dam A dam is a barrier that stops or restricts the flow of surface water or underground streams ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atsbi Wenberta
Atsbi Wemberta () is one of the Districts of Ethiopia, or ''woredas'', in the Tigray Region of Ethiopia. Located in the Misraqawi Zone at the eastern edge of the Ethiopian highlands, Atsbi Wenberta is bordered on the south by the Debub Misraqawi Zone, Debub Misraqawi (Southeastern) Zone, on the west by Kilte Awulaelo, on the north by Saesi Tsaedaemba, and on the east by the Afar Region. The administrative center of this woreda is Atsbi (officially Atsbi Endaselassie Tigrigna: ኣጽቢ እንዳስላሴ); other towns in Atsbi Wenberta include Haiqi Mesahil, Atsbi Dar'a, Kelisha Emni and Habes. The woreda is administratively divided into 18 tabiyas (municipalities). Overview The elevation of this woreda varies from 918 to 3069 meters above sea level."Pilot Learning Weredas: Atsi Wenberta" (Octo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tigray Region
The Tigray Region, officially the Tigray National Regional State, is the northernmost regional state in Ethiopia. The Tigray Region is the homeland of the Tigrayan, Irob, and Kunama people. Its capital and largest city is Mekelle. Tigray is the fifth-largest by area, the fifth-most populous, and the fifth-most densely populated of the 11 regional states. Tigray's official language is Tigrinya, similar to that spoken in Eritrea just to the North. The estimated population as of 2019 is 5,443,000. The majority of the population (c. 80%) are farmers, contributing 46% to the regional gross domestic product (2009). The highlands have the highest population density, especially in eastern and central Tigray. The much less densely populated lowlands comprise 48% of Tigray's area. Like many parts of Africa, Tigray is far from a religious monolith. Despite the historical identification of Ethiopia with Orthodox Christianity, the presence of Islam in Ethiopia is as old as the religion ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Earthen Dam
An embankment dam is a large artificial dam. It is typically created by the placement and compaction of a complex semi-plastic mound of various compositions of soil or rock. It has a semi-pervious waterproof natural covering for its surface and a dense, impervious core. This makes the dam impervious to surface or seepage erosion. Such a dam is composed of fragmented independent material particles. The friction and interaction of particles binds the particles together into a stable mass rather than by the use of a cementing substance. Types Embankment dams come in two types: the earth-filled dam (also called an earthen dam or terrain dam) made of compacted earth, and the rock-filled dam. A cross-section of an embankment dam shows a shape like a bank, or hill. Most have a central section or core composed of an impermeable material to stop water from seeping through the dam. The core can be of clay, concrete, or asphalt concrete. This type of dam is a good choice for sites wit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SAERT
Sustainable Agriculture and Environmental Rehabilitation in Tigray (SAERT) was a parastatal organisation in the Tigray Region of Ethiopia. It was established in 1995 for "policymaking, design and construction of dams and canals, and the maintenance of dams and water distribution systems". SAERT was funded jointly by the United Nations Development Programme, United Nations Economic Commission for Africa and Food and Agriculture Organization of the United Nations, with the Regional Government of Tigray sharing project financing in kind. Initially, SAERT planned on small-scale irrigation projects in the Mekelle plateau through constructions of 500 earthen micro-dams. Realizing that goal was too large, they concentrated on a few of the nearby drought-prone districts of Atsbi Wenberta Atsbi Wemberta () is one of the Districts of Ethiopia, or ''woredas'', in the Tigray Region of Ethiopia. Located in the Misraqawi Zone at the eastern edge of the Ethiopian highlands, Atsbi Wenberta is bo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Catchment
A drainage basin is an area of land where all flowing surface water converges to a single point, such as a river mouth, or flows into another body of water, such as a lake or ocean. A basin is separated from adjacent basins by a perimeter, the ''drainage divide'', made up of a succession of elevated features, such as ridges and hills. A basin may consist of smaller basins that merge at river confluences, forming a hierarchical pattern. Other terms for a drainage basin are catchment area, catchment basin, drainage area, river basin, water basin, and impluvium. In North America, they are commonly called a watershed, though in other English-speaking places, "watershed" is used only in its original sense, that of a drainage divide. In a closed drainage basin, or endorheic basin, the water converges to a single point inside the basin, known as a sink, which may be a permanent lake, a dry lake, or a point where surface water is lost underground. Drainage basins are similar but no ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Siltation
Siltation, is water pollution caused by particulate terrestrial clastic material, with a particle size dominated by silt or clay. It refers both to the increased concentration of suspended sediments and to the increased accumulation (temporary or permanent) of fine sediments on bottoms where they are undesirable. Siltation is most often caused by soil erosion or sediment spill. It is sometimes referred to by the ambiguous term "sediment pollution", which can also refer to a chemical contamination of sediments accumulated on the bottom, or to pollutants bound to sediment particles. Although "siltation" is not perfectly stringent, since it also includes particle sizes other than silt, it is preferred for its lack of ambiguity. Causes The origin of the increased sediment transport into an area may be erosion on land or activities in the water. In rural areas, the erosion source is typically soil degradation by intensive or inadequate agricultural practices, leading to soil eros ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seepage
Soil mechanics is a branch of soil physics and applied mechanics that describes the behavior of soils. It differs from fluid mechanics and solid mechanics in the sense that soils consist of a heterogeneous mixture of fluids (usually air and water) and particles (usually clay, silt, sand, and gravel) but soil may also contain organic solids and other matter.Mitchell, J.K., and Soga, K. (2005) Fundamentals of soil behavior, Third edition, John Wiley and Sons, Inc., .Powrie, W., Spon Press, 2004, ''Soil Mechanics – 2nd ed'' A Guide to Soil Mechanics, Bolton, Malcolm, Macmillan Press, 1979. Along with rock mechanics, soil mechanics provides the theoretical basis for analysis in geotechnical engineering, a subdiscipline of civil engineering, and engineering geology, a subdiscipline of geology. Soil mechanics is used to analyze the deformations of and flow of fluids within natural and man-made structures that are supported on or made of soil, or structures that are buried in soils.L ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Groundwater Recharge
Groundwater recharge or deep drainage or deep percolation is a hydrologic process, where water moves downward from surface water to groundwater. Recharge is the primary method through which water enters an aquifer. This process usually occurs in the vadose zone below plant roots and is often expressed as a flux to the water table surface. Groundwater recharge also encompasses water moving away from the water table farther into the saturated zone. Recharge occurs both naturally (through the water cycle) and through anthropogenic processes (i.e., "artificial groundwater recharge"), where rainwater and or reclaimed water is routed to the subsurface. Processes Water is recharged naturally by rain and snow melt and to a smaller extent by surface water (rivers and lakes). Recharge may be impeded somewhat by human activities including paving, development, or logging. These activities can result in loss of topsoil resulting in reduced water infiltration, enhanced surface runoff and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alaje
Alaje () is a District of Ethiopia, or ''woreda'', in the Tigray Region of Ethiopia. Part of the Debubawi Zone, Alaje is bordered on the south by Endamehoni, on the southwest by the Amhara Region, on the north by Debub Misraqawi (Southeastern) Zone, and on the southeast by Raya Azebo. The administrative center of this woreda is Adi Shehu; other towns in Alaje include Bora (also called Chelena) and Dela. The highest point in this woreda, as well as the Debubawi Zone, is Mount Emba Alaje, one of the southernmost peaks of the Wajirat Mountains. This prominence was the scene of several battles. The Battle of Emba Alaje (1895) was a significant defeat of the Italians during the First Italo-Ethiopian War. A later battle in 1941 was one of the last actions of the East African Campaign, and ended with the capture of the Duke of Aosta, the governor of Italian East Africa, as well as one of the last Italian strongholds. Demographics Based on the 2007 national census conducted by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
