May Leiba: Difference between revisions
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| coords = {{coord|13.694046|N|39.233739|E|type:waterbody_region:ET|display=inline,title}} |
| coords = {{coord|13.694046|N|39.233739|E|type:waterbody_region:ET|display=inline,title}} |
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| type = Freshwater artificial lake |
| type = Freshwater artificial lake |
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| inflow = |
| inflow = [[May Leiba River]] |
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| outflow = |
| outflow = |
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| catchment = |
| catchment = |
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}} |
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[[File:48. May Leiba 1.jpg|thumb|left|May Leiba]] |
[[File:48. May Leiba 1.jpg|thumb|left|May Leiba]] |
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'''May Leiba''' is a [[reservoir]] located in the [[Degua Tembien|Dogu’a Tembien]] ''woreda'' of the [[Tigray Region]] in [[Ethiopia]]. The [[earthen dam]] that holds the reservoir was built in 1998 by the [[Relief Society of Tigray]].<ref name="joke">{{cite book |last1=De Wit |first1=Joke |title=Stuwmeren in Tigray (Noord-Ethiopië): kenmerken, sedimentatie en sedimentbronnen. Unpub. M.Sc. thesis |date=2003 |publisher=Department of Geography, K.U.Leuven}}</ref> |
'''May Leiba''' is a [[reservoir]] located in the [[Degua Tembien|Dogu’a Tembien]] ''woreda'' of the [[Tigray Region]] in [[Ethiopia]]. It is named after the [[May Leiba River]]. The [[earthen dam]] that holds the reservoir was built in 1998 by the [[Relief Society of Tigray]].<ref name="joke">{{cite book |last1=De Wit |first1=Joke |title=Stuwmeren in Tigray (Noord-Ethiopië): kenmerken, sedimentatie en sedimentbronnen. Unpub. M.Sc. thesis |date=2003 |publisher=Department of Geography, K.U.Leuven}}</ref> |
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== Dam characteristics == |
== Dam characteristics == |
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* Dam crest length: 371 metres |
* Dam crest length: 371 metres |
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* [[Spillway]] width: 25 metres |
* [[Spillway]] width: 25 metres |
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[[File:48. May Leiba (spillway).jpg|thumb|May Leiba spillway]] |
[[File:48. May Leiba (spillway).jpg|thumb|left|May Leiba spillway]] |
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== Capacity == |
== Capacity == |
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* Reservoir area: 16 ha |
* Reservoir area: 16 ha |
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In 2002, the life expectancy of the reservoir (the duration before it is filled with sediment) was estimated at 15 years.<ref name="joke"/> |
In 2002, the life expectancy of the reservoir (the duration before it is filled with sediment) was estimated at 15 years.<ref name="joke"/> |
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[[File:Ruba Weyni irrigation.jpg|thumb|right|Irrigation scheme in [[Addi Idaga]], using seepage water from May Leiba]] |
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[[File:48. May Leiba (irrigation canal).jpg|thumb|left|May Leiba - irrigation canal that remains largely unused]] |
[[File:48. May Leiba (irrigation canal).jpg|thumb|left|May Leiba - irrigation canal that remains largely unused]] |
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== Irrigation == |
== Irrigation == |
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* Designed irrigated area: 50 ha |
* Designed irrigated area: 50 ha |
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* Actual irrigated area in 2002: 5 ha |
* Actual irrigated area in 2002: 5 ha |
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A first problem is administrative: the dam is located in one ‘’tabia’’ and the command area in another ‘’tabia’’, leading to disagreements with regard to the sharing of the water. The larger part of the water that could be used for formal irrigation is lost through [[seepage]] across the limestone;<ref> |
A first problem is administrative: the dam is located in one ‘’tabia’’ and the command area in another ‘’tabia’’, leading to disagreements with regard to the sharing of the water. The larger part of the water that could be used for formal irrigation is lost through [[seepage]] across the limestone;<ref>{{cite journal | url=https://www.sciencedirect.com/science/article/pii/S0031018205004281 | doi=10.1016/j.palaeo.2005.07.013 | title=Age and backfill/Overfill stratigraphy of two tufa dams, Tigray Highlands, Ethiopia: Evidence for Late Pleistocene and Holocene wet conditions | year=2006 | last1=Moeyersons | first1=Jan | last2=Nyssen | first2=Jan | last3=Poesen | first3=Jean | last4=Deckers | first4=Jozef | last5=Haile | first5=Mitiku | journal=Palaeogeography, Palaeoclimatology, Palaeoecology | volume=230 | issue=1–2 | pages=165–181 | bibcode=2006PPP...230..165M }}</ref> the positive side-effect is that this contributes to [[groundwater recharge]],<ref>{{cite journal |last1=Nigussie Haregeweyn |first1=and colleagues |title=Sediment yield variability in Northern Ethiopia: A quantitative analysis of its controlling factors |journal=Catena |date=2008 |volume=75 |issue=1 |pages=65–76 |doi=10.1016/j.catena.2008.04.011 |bibcode=2008Caten..75...65H }}</ref> particularly around the downstream settlement of Addi Idaga, where a large irrigation perimeter has been developed. |
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[[File:48. May Leiba (catchment 1).jpg|thumb|left|May Leiba catchment]] |
[[File:48. May Leiba (catchment 1).jpg|thumb|left|May Leiba catchment]] |
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[[File:48. May Leiba (catchment 2).jpg|thumb|right|May Leiba catchment]] |
[[File:48. May Leiba (catchment 2).jpg|thumb|right|May Leiba catchment]] |
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== Reservoir catchment == |
== Reservoir catchment == |
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The [[catchment]] of May Leiba reservoir is 17.87 km² large, with a perimeter of 17.61 km and a length of 4540 metres.<ref name="joke"/> |
The [[catchment]] of May Leiba reservoir is 17.87 km² large, with a perimeter of 17.61 km and a length of 4540 metres.<ref name="joke"/> |
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== Environment == |
== Environment == |
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The lithology of the catchment of the reservoir is [[Antalo Limestone]], Agula Shale, sandstone of the [[Amba Aradam Formation]] and [[Ashangi Basalts]].<ref name="joke"/> The main driving factors that define the variability in soil types in this |
The lithology of the catchment of the reservoir is [[Antalo Limestone]], Agula Shale, sandstone of the [[Amba Aradam Formation]] and [[Ashangi Basalts]].<ref name="joke"/> The main driving factors that define the variability in soil types in this catchment are: 1) geology, through soil parent material and the occurrence of harder layers, often acting as [[aquitard]]s or [[aquiclude]]s; 2) occurrence of [[mass movement (politics)|mass movement]] deposits that occupy large areas of the catchment; and 3) [[Human impact on the environment|anthropogenic]] [[soil erosion]] and deposition. These factors lead to “red-black” [[Skeletic]] [[Cambisol]]–[[Pellic]] [[Vertisol]] [[soil catena]]s on [[Ashangi Basalts|basalt]] and [[Calcaric]] [[Regosol]]–[[Colluvic]] [[Calcaric]] [[Cambisol]]–[[Calcaric]] [[Vertisol]] catenas on [[Antalo Limestone]].<ref>{{cite journal | url=https://www.sciencedirect.com/science/article/abs/pii/S0341816208000404 | doi=10.1016/j.catena.2008.04.006 | title=Soil–landscape relationships in the basalt-dominated highlands of Tigray, Ethiopia | year=2008 | last1=Van De Wauw | first1=J. | last2=Baert | first2=G. | last3=Moeyersons | first3=J. | last4=Nyssen | first4=J. | last5=De Geyndt | first5=K. | last6=Taha | first6=Nurhussein | last7=Zenebe | first7=Amanuel | last8=Poesen | first8=J. | last9=Deckers | first9=J. | journal=Catena | volume=75 | issue=1 | pages=117–127 | bibcode=2008Caten..75..117V }}</ref> |
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The reservoir suffers from rapid [[siltation]].<ref>{{cite journal |last1= |
The reservoir suffers from rapid [[siltation]].<ref>{{cite journal |last1=Haregeweyn |first1=Nigussie |display-authors=et al. |title=Reservoirs in Tigray: characteristics and sediment deposition problems |journal=Land Degradation and Development |date=2006 |volume=17 |pages=211–230 |doi=10.1002/ldr.698 |s2cid=129834993 |doi-access=free }}</ref> |
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Attempts have been done to reuse the reservoir sediment for crop production. While this doubled the [[garlic]] yield, it proved also to be a costly venture to transport the sediment from the dry lake bottom to nearby barren land in order to establish the plots.<ref> |
Attempts have been done to reuse the reservoir sediment for crop production. While this doubled the [[garlic]] yield, it proved also to be a costly venture to transport the sediment from the dry lake bottom to nearby barren land in order to establish the plots.<ref>{{cite journal | url=https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1475-2743.2011.00368.x | doi=10.1111/j.1475-2743.2011.00368.x | title=Land reclamation using reservoir sediments in Tigray, northern Ethiopia | year=2012 | last1=Girmay | first1=Gebreyohannes | last2=Nyssen | first2=J. | last3=Poesen | first3=J. | last4=Bauer | first4=H. | last5=Merckx | first5=R. | last6=Haile | first6=M. | last7=Deckers | first7=J. | journal=Soil Use and Management | volume=28 | pages=113–119 | hdl=1854/LU-2074098 | s2cid=93948998 | hdl-access=free }}</ref> |
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== References == |
== References == |
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[[Category:1998 establishments in Ethiopia]] |
[[Category:1998 establishments in Ethiopia]] |
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[[Category:Tigray Region]] |
[[Category:Tigray Region]] |
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[[Category:Dogu'a Tembien]] |
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Latest revision as of 00:57, 28 November 2023
| May Leiba | |
|---|---|
 | |
  May Leiba | |
| Coordinates | 13°41′39″N 39°14′01″E / 13.694046°N 39.233739°E |
| Typ | Freshwater artificial lake |
| Primary inflows | May Leiba River |
| Basin countries | Äthiopien |
| Surface area | 0.16 km2 (0.062 sq mi) |
| Water volume | 0.958×106 m3 (777 acre⋅ft) |
| Surface elevation | 2,290 m (7,510 ft) |
| Settlements | Addi Qoylo |
May Leiba is a reservoir located in the Dogu’a Tembien woreda of the Tigray Region in Ethiopia. It is named after the May Leiba River. The earthen dam that holds the reservoir was built in 1998 by the Relief Society of Tigray.[1]
Dam characteristics
[edit].jpg)
- Dam height: 18.9 metres
- Dam crest length: 371 metres
- Spillway width: 25 metres
.jpg)
Capacity
[edit]- Original capacity: 958 175 m³
- Dead storage: 191 635 m³
- Reservoir area: 16 ha
In 2002, the life expectancy of the reservoir (the duration before it is filled with sediment) was estimated at 15 years.[1]
.jpg)
Irrigation
[edit]- Designed irrigated area: 50 ha
- Actual irrigated area in 2002: 5 ha
A first problem is administrative: the dam is located in one ‘’tabia’’ and the command area in another ‘’tabia’’, leading to disagreements with regard to the sharing of the water. The larger part of the water that could be used for formal irrigation is lost through seepage across the limestone;[2] the positive side-effect is that this contributes to groundwater recharge,[3] particularly around the downstream settlement of Addi Idaga, where a large irrigation perimeter has been developed.
.jpg)
.jpg)
Reservoir catchment
[edit]The catchment of May Leiba reservoir is 17.87 km² large, with a perimeter of 17.61 km and a length of 4540 metres.[1]
Environment
[edit]The lithology of the catchment of the reservoir is Antalo Limestone, Agula Shale, sandstone of the Amba Aradam Formation and Ashangi Basalts.[1] The main driving factors that define the variability in soil types in this catchment are: 1) geology, through soil parent material and the occurrence of harder layers, often acting as aquitards or aquicludes; 2) occurrence of mass movement deposits that occupy large areas of the catchment; and 3) anthropogenic soil erosion and deposition. These factors lead to “red-black” Skeletic Cambisol–Pellic Vertisol soil catenas on basalt and Calcaric Regosol–Colluvic Calcaric Cambisol–Calcaric Vertisol catenas on Antalo Limestone.[4] The reservoir suffers from rapid siltation.[5] Attempts have been done to reuse the reservoir sediment for crop production. While this doubled the garlic yield, it proved also to be a costly venture to transport the sediment from the dry lake bottom to nearby barren land in order to establish the plots.[6]
References
[edit]- ^ a b c d De Wit, Joke (2003). Stuwmeren in Tigray (Noord-Ethiopië): kenmerken, sedimentatie en sedimentbronnen. Unpub. M.Sc. thesis. Department of Geography, K.U.Leuven.
- ^ Moeyersons, Jan; Nyssen, Jan; Poesen, Jean; Deckers, Jozef; Haile, Mitiku (2006). "Age and backfill/Overfill stratigraphy of two tufa dams, Tigray Highlands, Ethiopia: Evidence for Late Pleistocene and Holocene wet conditions". Palaeogeography, Palaeoclimatology, Palaeoecology. 230 (1–2): 165–181. Bibcode:2006PPP...230..165M. doi:10.1016/j.palaeo.2005.07.013.
- ^ Nigussie Haregeweyn, and colleagues (2008). "Sediment yield variability in Northern Ethiopia: A quantitative analysis of its controlling factors". Catena. 75 (1): 65–76. Bibcode:2008Caten..75...65H. doi:10.1016/j.catena.2008.04.011.
- ^ Van De Wauw, J.; Baert, G.; Moeyersons, J.; Nyssen, J.; De Geyndt, K.; Taha, Nurhussein; Zenebe, Amanuel; Poesen, J.; Deckers, J. (2008). "Soil–landscape relationships in the basalt-dominated highlands of Tigray, Ethiopia". Catena. 75 (1): 117–127. Bibcode:2008Caten..75..117V. doi:10.1016/j.catena.2008.04.006.
- ^ Haregeweyn, Nigussie; et al. (2006). "Reservoirs in Tigray: characteristics and sediment deposition problems". Land Degradation and Development. 17: 211–230. doi:10.1002/ldr.698. S2CID 129834993.
- ^ Girmay, Gebreyohannes; Nyssen, J.; Poesen, J.; Bauer, H.; Merckx, R.; Haile, M.; Deckers, J. (2012). "Land reclamation using reservoir sediments in Tigray, northern Ethiopia". Soil Use and Management. 28: 113–119. doi:10.1111/j.1475-2743.2011.00368.x. hdl:1854/LU-2074098. S2CID 93948998.