Soil faced deep trench bund is constructed by excavating trenches of 1 m deep, 0.5 - 1 m wide and 2 - 3.5 m long with spacing between trenches of 0.3 - 0.5 m along the contour and using the excavated soil to construct a compacted bund downslope. The smaller dimensions are usually used in cultivated lands while the larger are implemented in grazing lands.
Purpose of the Technology: Soil faced deep trench bund decreases slope length, runoff velocity and soil loss; and increases runoff harvesting, soil moisture and groundwater recharge.
Establishment / maintenance activities and inputs: Construction of soil faced deep trench bund involves alignment of a contour, excavation of trenches, construction and compaction of bund and planting grass, while the maintenance involves dredging of sediment from the trenches and use it for reinforcing the embankment.
Line level, tape meter, digging hoe, shovel and grass are needed for the establishment and maintenance.
Natural / human environment: The technology is implemented in moderate (5 - 8%) and hill (8 - 16%) slopes and in medium and heavy soil types of at least 1 m depth. It reduces runoff amount and velocity thereby decreasing soil loss and desertification/land degradation. It also improves soil moisture availability and groundwater recharge by encouraging lateral and vertical movement of water respectively.
It is mostly constructed using communal labour and there is an encouraging trend of spontaneous adoption. The technology is witnessed to be increasing crop and fodder production thereby improving the livelihood of the land users. It, however, is labour intensive and slightly reduces farm size.
Localização: Kilte Awlaelo, Tigray, Etiópia
Nº de sites de tecnologia analisados:
Difusão da tecnologia: Uniformemente difundida numa área (approx. 10-100 km2)
Em uma área permanentemente protegida?:
Data da implementação:
Tipo de introdução
Especifique a entrada | Unidade | Quantidade | Custos por unidade (Birr) | Custos totais por entrada (Birr) | % dos custos arcados pelos usuários da terra |
Mão-de-obra | |||||
Labour | ha | 1,0 | 2119,0 | 2119,0 | 60,0 |
Equipamento | |||||
Tools | ha | 1,0 | 44,0 | 44,0 | |
Material vegetal | |||||
Seedlings | ha | 1,0 | 36,0 | 36,0 | |
Custos totais para a implantação da tecnologia | 2'199.0 | ||||
Custos totais para o estabelecimento da Tecnologia em USD | 122.17 |
Especifique a entrada | Unidade | Quantidade | Custos por unidade (Birr) | Custos totais por entrada (Birr) | % dos custos arcados pelos usuários da terra |
Mão-de-obra | |||||
Labour | ha | 1,0 | 833,0 | 833,0 | 100,0 |
Custos totais para a manutenção da tecnologia | 833.0 | ||||
Custos totais de manutenção da Tecnologia em USD | 46.28 |
Increased investment in health as a result of increased income.