In order to slow down the water flow in the wadi courses and improve its infiltration into deeper soil layers and geologic formations, small check dams are installed on the wadi beds. They are usually positioned in series, with a spacing of 100-500m. These dams are made of gabion.
The gabion technique has been first introduced in the civil engineering domain. They are largely used since then and found many applications.
A gabion is a cage which has a cubic shape filled with stony material of suitable diameter enclosed in metal grating keeping the stones together and stops them from moving under the pressure of water. The gabion is normally the name of the cage only but it is also used frequently for the whole structure itself. The technique of gabion check dam consists in binding different cages together to form a complete gabion unit. The average height varies from 1 to 4 m and its length is a function of the width of the wadi bed (Royet, 1992).
Lugar: Beni Kedhache - Bhayra, Medenine, Tunisia
No. de sitios de Tecnología analizados:
Difusión de la Tecnología: distribuida parejamente sobre un área (approx. 10-100 km2)
¿En un área de protección permanente?:
Fecha de la implementación: 10-50 años atrás
Tipo de introducción
Especifique insumo | Unidad | Cantidad | Costos por unidad (Tunisian Dinars) | Costos totales por insumo (Tunisian Dinars) | % de los costos cubiertos por los usuarios de las tierras |
Mano de obra | |||||
Labour | Dam | 1,0 | 5000,0 | 5000,0 | 100,0 |
Material de construcción | |||||
Construction material | dam | 1,0 | 5000,0 | 5000,0 | 100,0 |
Gabion cages | dam | 1,0 | 10000,0 | 10000,0 | 100,0 |
Costos totales para establecer la Tecnología | 20'000.0 | ||||
Costos totales para establecer la Tecnología en USD | 15'384.62 |
Especifique insumo | Unidad | Cantidad | Costos por unidad (Tunisian Dinars) | Costos totales por insumo (Tunisian Dinars) | % de los costos cubiertos por los usuarios de las tierras |
Mano de obra | |||||
Labour | dam | 1,0 | 500,0 | 500,0 | 100,0 |
Material de construcción | |||||
construction material | dam | 1,0 | 500,0 | 500,0 | 100,0 |
Gabion cages | dam | 1,0 | 1000,0 | 1000,0 | 100,0 |
Indique los costos totales para mantenecer la Tecnología | 2'000.0 | ||||
Costos totales para mantener la Tecnología en USD | 1'538.46 |
Recharge of groundwater (water less salty and more available) and protection against the floods.