1.2 Detalhes do contato das pessoas capacitadas e instituições envolvidas na avaliação e documentação da tecnologia

Nome do projeto que facilitou a documentação/avaliação da Tecnologia (se relevante)

Book project: Water Harvesting – Guidelines to Good Practice (Water Harvesting)

1.3 Condições em relação ao uso da informação documentada através de WOCAT

Quando os dados foram compilados (no campo)?

03/05/2012

O/a compilador/a e a(s) pessoa(s) capacitada(s) aceitam as condições relativas ao uso de dados documentados através da WOCAT:

Sim

1.4 Declaração de sustentabilidade da tecnologia descrita

A tecnologia descrita aqui é problemática em relação a degradação da terra de forma que não pode ser declarada uma tecnologia de gestão sustentável de terra?

Não

2.1 Descrição curta da tecnologia

Definição da tecnologia:

A special tractor-pulled plough that automatically constructs water-harvesting catchments, ideally suited for large-scale reclamation work.

2.2 Descrição detalhada da tecnologia

Descrição:

The Vallerani implement is a modified plow named Delfino3, pulled by a heavy-duty tractor. A normal plow on flat land excavates a symmetrical furrow, and earth piles up equally on both sides of the furrow. The Delfino3 plow has a single reversible plowshare that creates an angled furrow and piles up the excavated soil only on the lower (downhill) side. This soil forms a ridge that stops or slows down runoff water as it flows downhill. The plow’s blade moves up and down (i.e. in and out of the soil), creating micro basins about 5 meters long, 50 cm deep and spaced about 2 m, each with a ridge. Two ripper placed before the plow work the soil to a depth of 70 cm, rise at the basin and descend between the basins. Thus to attain, in the stretch of land between the crescent, a collection bag which receives water from the crescents itself. Even with very low rainfall (150-500 mm/year) each micro-basin/storage bag can collect 1500 litres of water, including runoff. This water is protected against evaporation and remains available to plant roots and groundwater.

The Vallerani System is based on direct sowing of seeds of shrubs and trees of locally available, indigenous species. They are sown along the ridges of the basins and in the wake of the ripper. In the case study area Acacia tortilis, Ziziphus mauritania, Balanites aegyptiaca, Acacia senegal, Acacia seyal and Faidherbia albida have been sown. While for most species seeds can be collected by the local population, for species rarely present in the region, the seeds have to be purchased from tree nurseries. The use of goat excrements containing seeds has also proven successful (about 95% of all micro basin have at least one tree growing after 3 years) when directly sown. With more moisture available for a long time trees grow rapidly and the herbaceous cover improves in quality and in quantity - providing 20-30 times more livestock fodder (1000-2000kg dry herbaceous biomass ha/year), also helping to conserve the soil. The plowed and sown area is not protected by fences, grazing of animals shall be allowed so that villagers can benefit from the forage and reduce the accumulation of biomass fuel that would further the risk of fires in the dry season.

The Vallerani plow can ‘treat’ up to 20 ha, digging 5.720 micro basins, in a single day. The speed and effectiveness of the Delfino3 plow are its major advantages in the fight against desertification, but can also be its major limitation as to be able to make the best of it, it is necessary to find great availability of land to be reforested or cultivate. This is mainly possible related to a large public or business initiative. The spreading "like wildfire" that has characterized the case study was made possible by the presence on the territory of an NGO already active and rooted in the territory for many years and by perseverance, respect and competence of partner "of the North". Once the project has invested in the tractor and the plow (tractor ~ 70,000 EUR, plough ~ 40,000 EUR), the remaining cost of implementation – labour costs for local workers and drivers, fuel etc. amount to around EUR 125 / ha / year.

The case study area in the north east of Burkina Faso receives about 300-500 mm of annual rainfall. The soils of this agropastoral land are heavily degraded with a low tree density and an almost entirely absent herbaceous cover.

2.3 Fotos da tecnologia

2.5 País/região/locais onde a tecnologia foi aplicada e que estão cobertos nesta avaliação

2.6 Data da implementação

Caso o ano exato seja desconhecido, indique a data aproximada:

• 10-50 anos atrás

2.7 Introdução da tecnologia

Especifique como a tecnologia foi introduzida:

• durante experiências/ pesquisa

3.1 Principal/principais finalidade(s) da tecnologia

• Melhora a produção
• Reduz, previne, recupera a degradação do solo

3.2 Tipo(s) atualizado(s) de uso da terra onde a tecnologia foi aplicada

Comentários:

Major land use problems (compiler’s opinion): Land degradation-desertification with reduction of vegetation cover in terms of plant density and species diversity is the main problem: disappearance of grasses and trees, reduction of the size of the plants that are resistant and of the biological activity of the soil. Runoff, water and wind erosion increase. Drought and irregular precipitation have heavy consequences on soil fertility, availability of water for humans and livestock, and recharging groundwater.

3.3 Mais informações sobre o uso da terra

Abastecimento de água para a terra na qual a tecnologia é aplicada:

• Precipitação natural

Número de estações de cultivo por ano:

• 1

Especifique:

Longest growing period in days: 90

3.4 Grupo de GST ao qual pertence a tecnologia

• Coleta de água

3.5 Difusão da tecnologia

Comentários:

Total area covered by the SLM Technology is 50 m2.

3.6 Medidas de GST contendo a tecnologia

3.7 Principais tipos de degradação da terra abordados pela tecnologia

Comentários:

Main causes of degradation: over-exploitation of vegetation for domestic use, overgrazing, change of seasonal rainfall, droughts
Secondary causes of degradation: deforestation / removal of natural vegetation (incl. forest fires), education, access to knowledge and support services

3.8 Redução, prevenção ou recuperação da degradação do solo

Especifique o objetivo da tecnologia em relação a degradação da terra:

• Recuperar/reabilitar solo severamente degradado

4.1 Desenho técnico da tecnologia

4.2 Especificações técnicas/ explicações do desenho técnico

Above:
A. The land chosen together with the local population is plowed with the special Delfino3 plow. B. Local people sow seeds (collected from local trees or bought if species are rare) or goat dung containing seeds (collected in the night enclosures after feeding the goats shaking trees with ripe seeds). C. The micro basins collect the rain that falls into the crescents and 50% of the runoff water. The water easily penetrates into the soil, fills the storage bags, remains available to plant roots and drains into the groundwater without risk of evaporation. Each micro basin/storage bag can collect up to 1.500 l of water.
Below
h1-Depth of the ploughshares work: =40/50 cm
Width of the micro basin: 40/50 cm
L1-Length of the micro basin, programmable: =3,5/5 m
h2 Depth of the rippers work: =50/80 cm
P-Total length of work: 4/8 m
Tractors horsepower 210/250 (150-198 Kw)
Working speed: 4/7 Km/h
Weight : 2000 Kg

Location: Oudalan, Gorom Gorom province. Burkina Faso
Technical knowledge required for field staff / advisors: high

Main technical functions: control of raindrop splash, improvement of ground cover, improvement of topsoil structure (compaction), stabilisation of soil (eg by tree roots against land slides), water harvesting / increase water supply, increase of biomass (quantity), promotion of vegetation species and varieties (quality, eg palatable fodder)
Secondary technical functions: increase in organic matter, increase in nutrient availability (supply, recycling,…), increase of infiltration, increase / maintain water stored in soil

Retention/infiltration ditch/pit, sediment/sand trap
Spacing between structures (m): 0.5
Depth of ditches/pits/dams (m): 2
Length of ditches/pits/dams (m): 5
Change of land use practices / intensity level

4.4 Atividades de implantação

	Atividade	Tipo de medida	Periodicidade
1.	Project planning, consulting and training by VS and national experts	Estrutural
2.	Plowing with the Delfino special plow pulled by a 210hp tractor	Estrutural	Dry season
3.	Seed harvesting can be done by local people either collecting them directly from plants or by shaking the plants at the appropriate time, to feed the goats and sheep with the fallen seeds and collect their dung in the night enclosure	Estrutural
4.	Missing seeds can be purchased in local markets or, if trees are too rare or if the species is no longer present, seeds must be purchased at a nursery	Estrutural	When seeds are ripe
5.	Direct sowing	Estrutural	Dry season

4.5 Custos e entradas necessárias para a implantação

	Especifique a entrada	Unidade	Quantidade	Custos por unidade	Custos totais por entrada	% dos custos arcados pelos usuários da terra
Mão-de-obra	labour	ha	1,0	72,0	72,0	50,0
Equipamento	machine use	ha	1,0	23,4	23,4
Custos totais para a implantação da tecnologia					95,4

4.6 Atividades recorrentes/manutenção

	Atividade	Tipo de medida	Periodicidade/frequência
1.	No maintenance activities are required	Estrutural

4.7 Custos e entradas necessárias pata a manutenção/atividades recorrentes (por ano)

Comentários:

All data presented in the table refer to an ideal project which lasts 5 years with 3000 hectares plowed each year. All works are carried for economic retribution. Item number 1 refers to the planning, training and consulting engineers that has a strong impact on the cost per ha ($47). This voice would remain the same if 3 MTU (Mechanized Technical Unit) were used in the same area reducing its impact to $ 15,6 per ha.

4.8 Fatores mais importantes que afetam os custos

Descreva os fatores mais determinantes que afetam os custos:

Upfront costs for the aquisition of the required materials are around 40,000 EUR for the plough and 70,000 EUR for the tractor.

5.1 Clima

5.2 Topografia

5.3 Solos

5.4 Disponibilidade e qualidade de água

5.5 Biodiversidade

5.6 Características dos usuários da terra que utilizam a tecnologia

Indique outras características relevantes dos usuários da terra:

Land users applying the Technology are mainly common / average land users
Difference in the involvement of women and men: The project involves the reforestation and reconstruction of the herbaceous layer for the grazing of livestock that are male dominated activities. Since 2010 women have sown special plants for medical use, domestic use and as raw material for crafts and protected them from grazing.
Population density: 10-50 persons/km2
Annual population growth: 3% - 4%
Off-farm income specification: The only activity people of the region are engaged in is goat and cattle breading. Crop production is practiced only for subsistence use.

5.7 Média da área de terra própria ou arrendada por usuários da terra que utilizam a tecnologia

5.8 Propriedade de terra, direitos de uso da terra e de uso da água

Propriedade da terra:

• Estado
• Comunitário/rural

Direitos do uso da terra:

• Acesso livre (não organizado)
• Comunitário (organizado)

Direitos do uso da água:

• Acesso livre (não organizado)
• Comunitário (organizado)

5.9 Acesso a serviços e infraestrutura

6.1 Impactos no local mostrados pela tecnologia

Impactos socioeconômicos

Produção

Impactos socioculturais

Impactos ecológicos

Ciclo hídrico/escoamento

Solo

Biodiversidade: vegetação, animais

Clima e redução de riscos de desastre

Outros impactos ecológicos

6.2 Impactos externos mostrados pela tecnologia

6.3 Exposição e sensibilidade da tecnologia às mudanças climáticas graduais e extremos/desastres relacionados ao clima (conforme o ponto de vista dos usuários da terra)

Mudança climática gradual

Mudança climática gradual

	Estação do ano	Tipo de mudança climática/extremo	Como a tecnologia lida com isso?
Temperatura anual		aumento	bem

Extremos (desastres) relacionados ao clima

Desastres meteorológicos

	Como a tecnologia lida com isso?
Temporal local	bem
Tempestade de vento local	bem

Desastres climatológicos

	Como a tecnologia lida com isso?
Seca	bem

Desastres hidrológicos

	Como a tecnologia lida com isso?
Inundação geral (rio)	não conhecido

Outras consequências relacionadas ao clima

Outras consequências relacionadas ao clima

	Como a tecnologia lida com isso?
Período de crescimento reduzido	bem

6.4 Análise do custo-benefício

Como os benefícios se comparam aos custos de implantação (do ponto de vista dos usuários da terra)?

Como os benefícios se comparam aos custos recorrentes/de manutenção(do ponto de vista dos usuários da terra)?

6.5 Adoção da tecnologia

• mais que 50%

Entre todos aqueles que adotaram a tecnologia, quantos adotaram espontaneamente, ou seja, sem receber nenhum incentivo material/pagamentos?

• 0-10%

Comentários:

100% of land user families have adopted the Technology with external material support
Comments on acceptance with external material support: The system includes the use of a heavy duty tractor and a special plow whose costs are high though difficult to sustain by the local population. All correlated activities are done (or can be done) without external material support
There is a strong trend towards spontaneous adoption of the Technology
The system includes the use of a heavy duty tractor and a special plow whose cost is high though difficult to sustain by the local population. All other activities part of the system are practicable from the population under an initial guidance of someone with specific training. Where the technology is known there is active participation of local people and a strong demand for new interventions

6.7 Pontos fortes/vantagens/oportunidades da tecnologia

Pontos fortes/vantagens/oportunidades na visão do/a compilador/a ou de outra pessoa capacitada
This practice allows for the rapid and efficient treatment of large degraded areas within a short time
The tree and shrub species planted are mainly indigenous and locally adapted species
Through its tillage process the Vallerani system offers the highest degree of efficiency in the first years from processing. Its effects last for a long time so it does not need to be repeated on the same site
The VS does not use any water (except rain) in countries where water is rare and precious. It further avoids the risk of soil salinisation.
The delfino3 can plow strongly degraded land, this makes that local people often ask to work their worse land

6.8 Pontos fracos, desvantagens/riscos da tecnologia e formas de superá-los

Pontos fracos/vantagens/riscos na visão do/a compilador/a ou de outra pessoa capacitada	Como eles podem ser superados?
The investment costs for the machinery are extremely high and cannot be covered by single land users or even communities	projects must be financed externally
The speed and effectiveness of the Delfino3 plow are its major advantages in the fight against desertification, but can also be its major limitation as to be able to make the best of it, it is necessary to find great availability of land to be reforested or cultivate	This is mainly possible related to a large public or business initiative. The spreading "like wildfire" that has characterized the case study was made possible by the presence on the territory of an NGO already active and rooted in the territory for many years and by perseverance, respect and competence of the partner "of the North"
Since great extentions will be processed, a big organisation is needed for all activities (awareness raising, collecting seeds, personnel training, logistics, etc),	this must be well organized and should operate already before starting plowing

7.1 Métodos/fontes de informação

7.2 Referências às publicações disponíveis

Título, autor, ano, ISBN:

Conedera, M., N. Bomio-Pacciorini, et al. 2010. Reconstitution des écosystèmes dégradés sahéliens. Bois et Forêts des Tropiques 304(2).

Disponível de onde? Custos?

http://www.vallerani.com/images/Reconstitution.pdf

Título, autor, ano, ISBN:

Akhtar Ali, Theib Oweis, Atef Abdul Aal, Mohamed Mudabbar, Khaled Zubaidi, and Adriana Bruggeman. 2006. The Vallerani Water Harvesting System. ICARDA Caravan No. 23.

Disponível de onde? Custos?

http://www.vallerani.com/images/Caravan-23.pdf