Walta (Dogu'a Tembien)

Walta is a tabia or municipality in the Dogu'a Tembien district of the Tigray Region of Ethiopia. The tabia centre is in Da’erere village, located approximately 7 km to the south of the woreda town Hagere Selam.

Walta
The southern side of Walta stretches down towards Giba River
Walta
Location within Ethiopia
Coordinates: 13°35′N 39°11′E
CountryEthiopia
RegionTigray
ZoneDebub Misraqawi (Southeastern)
WoredaDogu'a Tembien
Area
 • Total54.85 km2 (21.18 sq mi)
Elevation
2,340 m (7,680 ft)
Time zoneUTC+3 (EAT)

Geography

The tabia stretches down from the foot of the Tsatsen ridge escarpment towards Giba River. It is further bound by three gorges: Gra Adiam/Bitchoqo in the east, Giba River in the south, and Zeyi River in the west. The highest peak is near the top of Tsatsen plateau (2760 m a.s.l.) and the lowest place at the confluence of Giba and Zeyi Rivers (1400 m a.s.l.), which have a difference in elevation of nearly 1400 metres.

Geology

From the higher to the lower locations, the following geological formations are present:[1]

Geomorphology and soils

The main geomorphic units, with corresponding soil types are:[3]

  • Gently rolling Antalo Limestone plateau, holding cliffs and valley bottoms on limestone
  • Adigrat Sandstone cliff and footslope
    • Associated soil types
      • complex of rock outcrops, very stony and very shallow soils ((Lithic) Leptosol)
      • shallow, stony sandy [[loam soils (Eutric Regosol and Cambisol)
    • Inclusions
      • shallow, dry soils with very high amounts of stones (Leptic and Skeletic Cambisol and Regosol)
      • deep, dark cracking clays with good fertility, but problems of waterlogging (Chromic and Pellic Vertisol)
      • soils with stagnating water due to an abrupt textural change such as sand over clay (Haplic Planosol]])
See also: Soil in Dogu'a Tembien

Climate and hydrology

Climate and meteorology

The rainfall pattern shows a very high seasonality with 70 to 80% of the annual rain falling in July and August. Mean temperature in Da’erere is 19.3 °C, oscillating between average daily minimum of 10.8 °C and maximum of 27.4 °C. The contrasts between day and night air temperatures are much larger than seasonal contrasts.[4]

Rivers

The Giba River is the most important river in the surroundings of the tabia. It flows towards Tekezze River and further on to the Nile. These rivers have incised deep gorges which characterise the landscape.[5] The drainage network of the tabia is organised as follows:[6]

Whereas they are (nearly) dry during most of the year, during the main rainy season, these rivers carry high runoff discharges, sometimes in the form of flash floods. Especially at the begin of the rainy season they are brown-coloured, evidencing high soil erosion rates.

Springs

As there are no permanent rivers, the presence of springs is of utmost importance for the local people. The main springs in the tabia are:[7]

  • Kalena in Addi Ferti
  • May Shafa in Addi Ferti
  • May Ayni in Da’erere
  • May Tselot near Giba River

Water harvesting

In this area with rains that last only for a couple of months per year, reservoirs of different sizes allow harvesting runoff from the rainy season for further use in the dry season.

  • Traditional surface water harvesting ponds, particularly in places without permanent springs, called rahaya
  • Horoyo, household ponds, recently constructed through campaigns[8]

Vegetation and exclosures

The tabia holds several exclosures, areas that are set aside for regreening. [9] Wood harvesting and livestock range are not allowed there. Besides effects on biodiversity,[10][11][12] water infiltration, protection from flooding, sediment deposition, [13] carbon sequestration, [14] people commonly have economic benefits from these exclosures through grass harvesting, beekeeping and other non-timber forest products.[15] The local inhabitants also consider it as “land set aside for future generations”.[16] In this tabia, some exclosures are managed by the EthioTrees project. They have as an additional benefit that the villagers receive carbon credits for the sequestered CO2,[17] as part of a carbon offset programme.[18] The revenues are then reinvested in the villages, according to the priorities of the communities; [19] it may be for an additional class in the village school, a water pond, conservation in the exclosures, or a store for incense.[20] The Ziban Dake exclosure is managed by the Ethiotrees project in Walta municipality.[21]

Settlements

The tabia centre Da’erere holds a few administrative offices, a health post, a primary school, and some small shops.[7] There are a few more primary schools across the tabia. The main other populated places are:[6]

  • Nowate
  • Addi Ferti
  • Inda Iyesus
  • Addi Gethamano
  • Guri
  • Didiben
  • Nibre

Agriculture and livelihood

The population lives essentially from crop farming, supplemented with off-season work in nearby towns. The land is dominated by farmlands which are clearly demarcated and are cropped every year. Hence the agricultural system is a permanent upland farming system.[22] The farmers have adapted their cropping systems to the spatio-temporal variability in rainfall.[23] Especially the youngsters in Didiben and Nibre go to the deep gorge of Giba river to harvest incense from Boswellia papyrifera trees.[24]

History and culture

History

The history of the tabia is strongly confounded with the history of Tembien.

Religion and churches

Most inhabitants are Orthodox Christians. The following churches are located in the tabia:

  • Nibre Abune Ayezgi
  • Didiben Iyesus
  • Mehanie Alem
  • Addi Ferti Maryam

Inda Siwa, the local beer houses

In the main villages, there are traditional beer houses (Inda Siwa), often in unique settings, where people socialise. Well known in the tabia are[7]

  • Amlesu Gebremariam at Da’erere
  • Tinsu’i Belay at Da’erere

Roads and communication

The main road Mekelle – Hagere Selam – Abiy Addi runs 5 to 15 km north and west of the tabia. People need to walk first to Inda Maryam Qorar or Hagere Selam before travelling further. For transportation of goods, a rural access road links Walta to the main asphalt road in Dongolo.

Tourism

Its mountainous nature and relative proximity to Mekelle make the tabia fit for tourism.[25] As compared to many other mountain areas in Ethiopia the villages are quite accessible, and during walks visitors may be invited for coffee, lunch or even for an overnight stay in a rural homestead.[26]

Touristic attractions
  • Views over the gorges, including view of Zeyi Abune Aregawi church under a cliff
  • Anthropogenic Boswellia papyrifera landscapes and incense harvesting

Geotouristic sites

The high variability of geological formations and the rugged topography invite for geological and geographic tourism or "geotourism".[27]

Trekking routes

Trekking routes have been established in this tabia.[28] The tracks are not marked on the ground but can be followed using downloaded. GPX files.[29]

  • Trek 9, from Hagere Selam to Inda Sillasie allows visiting the northern part of the tabia
  • Trek 8, southbound from Zeyi church and cave, crosses the southern part of the tabia to Giba River and allows visiting the slopes of the Giba gorge, with numerous incense trees
gollark: That prompted me to check my stuff, and hydraz/matheus followed me on github for some reason? How odd.
gollark: Wait, you have projects involvng web terminal thingies?
gollark: I was mostly looking at the API for image drawing itself.
gollark: Hmm, I feel stupider now.
gollark: https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/drawImage

See also
  • Dogu'a Tembien district.

References
  1. Sembroni, A.; Molin, P.; Dramis, F. (2019). Regional geology of the Dogu'a Tembien massif. In: Geo-trekking in Ethiopia's Tropical Mountains — The Dogu'a Tembien District. SpringerNature. ISBN 978-3-030-04954-6.
  2. Moeyersons, J. and colleagues (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): 162–178. Bibcode:2006PPP...230..165M. doi:10.1016/j.palaeo.2005.07.013.
  3. Nyssen, Jan; Tielens, Sander; Gebreyohannes, Tesfamichael; Araya, Tigist; Teka, Kassa; Van De Wauw, Johan; Degeyndt, Karen; Descheemaeker, Katrien; Amare, Kassa; Haile, Mitiku; Zenebe, Amanuel; Munro, Neil; Walraevens, Kristine; Gebrehiwot, Kindeya; Poesen, Jean; Frankl, Amaury; Tsegay, Alemtsehay; Deckers, Jozef (2019). "Understanding spatial patterns of soils for sustainable agriculture in northern Ethiopia's tropical mountains". PLOS ONE. 14 (10): e0224041. doi:10.1371/journal.pone.0224041. PMC 6804989. PMID 31639144.
  4. Jacob, M. and colleagues (2019). Dogu'a Tembien's Tropical Mountain Climate. In: Geo-trekking in Ethiopia's Tropical Mountains — The Dogu'a Tembien District. SpringerNature. doi:10.1007/978-3-030-04955-3_3. ISBN 978-3-030-04954-6.
  5. Amanuel Zenebe, and colleagues (2019). The Giba, Tanqwa and Tsaliet rivers in the headwaters of the Tekezze basin. In: Geo-trekking in Ethiopia's Tropical Mountains — The Dogu'a Tembien District. SpringerNature. doi:10.1007/978-3-030-04955-3_14. ISBN 978-3-030-04954-6.
  6. Jacob, M. and colleagues (2019). Geo-trekking map of Dogu'a Tembien (1:50,000). In: Geo-trekking in Ethiopia's Tropical Mountains — The Dogu'a Tembien District. SpringerNature. ISBN 978-3-030-04954-6.
  7. What do we hear from the farmers in Dogu'a Tembien? [in Tigrinya]. Hagere Selam, Ethiopia. 2016. p. 100.
  8. "Developers and farmers intertwining interventions: the case of rainwater harvesting and food-for-work in Degua Temben, Tigray, Ethiopia: International Journal of Agricultural Sustainability: Vol 6, No 3". doi:10.3763/ijas.2008.0366. Cite journal requires |journal= (help)
  9. Aerts, R; Nyssen, J; Mitiku Haile (2009). "On the difference between "exclosures" and "enclosures" in ecology and the environment". Journal of Arid Environments. 73 (8): 762–763. doi:10.1016/j.jaridenv.2009.01.006.
  10. Aerts, R.; Lerouge, F.; November, E. (2019). Birds of forests and open woodlands in the highlands of Dogu'a Tembien. In: Geo-trekking in Ethiopia's Tropical Mountains - The Dogu'a Tembien District. SpringerNature. ISBN 978-3-030-04954-6.
  11. Mastewal Yami, and colleagues (2007). "Impact of Area Enclosures on Density and Diversity of Large Wild Mammals: The Case of May Ba'ati, Douga Tembien Woreda, Central Tigray, Ethiopia". East African Journal of Sciences. 1: 1–14.
  12. Aerts, R; Lerouge, F; November, E; Lens, L; Hermy, M; Muys, B (2008). "Land rehabilitation and the conservation of birds in a degraded Afromontane landscape in northern Ethiopia". Biodiversity and Conservation. 17: 53–69. doi:10.1007/s10531-007-9230-2.
  13. Descheemaeker, K. and colleagues (2006). "Sediment deposition and pedogenesis in exclosures in the Tigray Highlands, Ethiopia". Geoderma. 132 (3–4): 291–314. doi:10.1016/j.geoderma.2005.04.027.
  14. Wolde Mekuria, and colleagues (2011). "Restoration of Ecosystem Carbon Stocks Following Exclosure Establishment in Communal Grazing Lands in Tigray, Ethiopia". Soil Science Society of America Journal. 75 (1): 246–256. doi:10.2136/sssaj2010.0176.
  15. Bedru Babulo, and colleagues (2006). "Economic valuation methods of forest rehabilitation in exclosures". Journal of the Drylands. 1: 165–170.
  16. Jacob, M. and colleagues (2019). Exclosures as Primary Option for Reforestation in Dogu'a Tembien. In: Geo-trekking in Ethiopia's Tropical Mountains - The Dogu'a Tembien District. SpringerNature. ISBN 978-3-030-04954-6.
  17. Reubens, B. and colleagues (2019). Research-based development projects in Dogu'a Tembien. In: Geo-trekking in Ethiopia's Tropical Mountains - The Dogu'a Tembien District. SpringerNature. ISBN 978-3-030-04954-6.
  18. EthioTrees on Plan Vivo website
  19. EthioTrees on Davines website
  20. Moens, T; Lanckriet, S; Jacob, M (2019). "Boswellia Incense in the Giba River Gorge". Geo-trekking in Ethiopia's Tropical Mountains. GeoGuide. Springer Nature. pp. 293–300. doi:10.1007/978-3-030-04955-3_19. ISBN 978-3-030-04954-6.
  21. De Deyn, Jonathan (2019). Benefits of reforestation on Carbon storage and water infiltration in the context of climate mitigation in North Ethiopia. Master thesis, Ghent University, Belgium.
  22. Nyssen, J.; Naudts, J.; De Geyndt, K.; Haile, Mitiku; Poesen, J.; Moeyersons, J.; Deckers, J. (2008). "Soils and land use in the Tigray highlands (Northern Ethiopia)". Land Degradation and Development. 19 (3): 257–274. doi:10.1002/ldr.840.
  23. Frankl, A. and colleagues (2013). "The effect of rainfall on spatio‐temporal variability in cropping systems and duration of crop cover in the Northern Ethiopian Highlands". Soil Use and Management. 29 (3): 374–383. doi:10.1111/sum.12041.
  24. Moens, T. and colleagues (2019). Boswellia Incense in the Giba River Gorge. In: Geo-trekking in Ethiopia's Tropical Mountains — The Dogu'a Tembien District. SpringerNature. doi:10.1007/978-3-030-04955-3_19. ISBN 978-3-030-04954-6.
  25. Geo-trekking in Ethiopia's Tropical Mountains — The Dogu'a Tembien District. GeoGuide. SpringerNature. 2019. ISBN 978-3-030-04954-6.
  26. Nyssen, Jan (2019). "Logistics for the Trekker in a Rural Mountain District of Northern Ethiopia". Geo-trekking in Ethiopia's Tropical Mountains. GeoGuide. Springer-Nature. pp. 537–556. doi:10.1007/978-3-030-04955-3_37. ISBN 978-3-030-04954-6.
  27. Miruts Hagos and colleagues (2019). Geosites, Geoheritage, Human-Environment Interactions, and Sustainable Geotourism in Dogu'a Tembien. In: Geo-Trekking in Ethiopia's Tropical Mountains, the Dogu'a Tembien District. SpringerNature. doi:10.1007/978-3-030-04955-3_1. ISBN 978-3-030-04954-6.
  28. Nyssen, Jan (2019). Description of Trekking Routes in Dogu'a Tembien. GeoGuide. Springer-Nature. pp. 557–675. doi:10.1007/978-3-030-04955-3_38. ISBN 978-3-030-04954-6.
  29. "Public GPS traces tagged with nyssen-jacob-frankl". OpenStreetMap. Retrieved 2019-10-11.
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