Integrated runoff harvesting system
Setting up the infrastructure involves dividing the land in the valley into raised beds of ±10 m x 20 m which are separated by furrows, acting as drainage channels. Below the furrows is a pond. These furrows, however, can also fulfil the opposite role – distributing runoff water from upslope in the valley bottom if required. A diversion channel has been constructed to guide runoff from a track towards the valley. The channel is 0.5 m deep, 1 m wide, over 100 m in length and with a gradient of 0.5% - 1.0%. It is estimated that the ratio of catchment to cultivated area is 10:1. The channel is left open to divert runoff in times of shortage (though, naturally, as with any rainwater harvesting system, there has to be rain locally before it can be harvested). This water then can be held by the furrows whose outlet can be blocked. Citrus fruits (oranges) and mangoes are planted on the beds, and intercropped with annuals.
Purpose of the Technology: The purpose is production of cash crops, based on reclamation of land and control of concentrated runoff. The impact is achieved through a flexible method
of drainage/water harvesting, which helps ensure suitable moisture conditions for growth.
Establishment / maintenance activities and inputs: The main maintenance aspect is clearing inlets, channels and removing vegetation, using common household hand tools such as spades and hoes.
Natural / human environment: The technology is situated in a valley near a swamp. It consists of growing both annual and perennial crops throught the year. The farm is located in a semi-arid area. The soil is sandy loam and shallow.
Localização: Katakwi, Katakwi, Uganda
Nº de sites de tecnologia analisados:
Difusão da tecnologia: Uniformemente difundida numa área (approx. 1-10 km2)
Em uma área permanentemente protegida?:
Data da implementação: menos de 10 anos atrás (recentemente)
Tipo de introdução
| Especifique a entrada | Unidade | Quantidade | Custos por unidade (Uganda shillings) | Custos totais por entrada (Uganda shillings) | % dos custos arcados pelos usuários da terra |
| Mão-de-obra | |||||
| Labour | ha | 1,0 | 270,0 | 270,0 | 100,0 |
| Equipamento | |||||
| Tools | ha | 1,0 | 42,0 | 42,0 | 100,0 |
| Material vegetal | |||||
| Seeds | ha | 1,0 | 23,0 | 23,0 | 100,0 |
| Fertilizantes e biocidas | |||||
| Compost manure | ha | 1,0 | 10,0 | 10,0 | 100,0 |
| Custos totais para a implantação da tecnologia | 345.0 | ||||
| Custos totais para o estabelecimento da Tecnologia em USD | 0.34 | ||||
| Especifique a entrada | Unidade | Quantidade | Custos por unidade (Uganda shillings) | Custos totais por entrada (Uganda shillings) | % dos custos arcados pelos usuários da terra |
| Mão-de-obra | |||||
| Labour | ha | 1,0 | 340,0 | 340,0 | 100,0 |
| Equipamento | |||||
| Tools | ha | 1,0 | 315,0 | 315,0 | 100,0 |
| Material vegetal | |||||
| Seeds | ha | 1,0 | 71,0 | 71,0 | 100,0 |
| Custos totais para a manutenção da tecnologia | 726.0 | ||||
| Custos totais de manutenção da Tecnologia em USD | 0.73 | ||||
Negative: Can lead to waterlogging
