1.2 Coordonnées des personnes-ressources et des institutions impliquées dans l'évaluation et la documentation de la Technologie

Nom du ou des institutions qui ont facilité la documentation/ l'évaluation de la Technologie (si pertinent)

Missenyi District Council (Missenyi District Council) - Tanzanie

Nom du ou des institutions qui ont facilité la documentation/ l'évaluation de la Technologie (si pertinent)

Food and Agriculture Organization of the United Nations (FAO) - Italie

1.3 Conditions relatives à l'utilisation par WOCAT des données documentées

Quand les données ont-elles été compilées (sur le terrain)?

28/08/2012

Le compilateur et la(les) personne(s) ressource(s) acceptent les conditions relatives à l'utilisation par WOCAT des données documentées:

Oui

1.5 Référence au(x) questionnaire(s) sur les Approches de GDT

2.1 Courte description de la Technologie

Définition de la Technologie:

Construction of indigenous water pond and a livestock watering trough along an underground water source.

2.2 Description détaillée de la Technologie

Description:

This technology is used during the dry seasons and where ground water level is high and there is natural water stream flowing from underground water source. Water pond is excavated along the naturally flowing water stream and is recharged by natural ground water. The size of the pond will vary depending on the area available, groundwater table, slope and soil characteristic. Groundwater collection ponds described in this technology on average are 4m long, 3m wide and 1m deep of 12m3 (12 000 liter) capacity and the slope is moderate 5% to 8% and soil characteristics is clay loam with deep soil. Water troughs (Elyato by local name) are constructed adjacent to the water pond to allow livestock to access clean drinking water. The number of troughs per pond is usually 1 to 2. Materials used in construction of water trough include clay, red termite mound soil, grass and wooden poles. The number of ponds needed usually depends on the expected number of animals and are arranged at irregular intervals ranging from 10 to 20 meters apart. The average size of a water trough is 0.14 m3 and can cater for 5 cattle at a time. The Pond is stabilized by naturally growing grass on its banks. Common pond stabilizer species are Leodicatiar digitalia and Hyperrhenia rufa. Management of the natural water source is through preventive village/customary by-laws which prohibit tree and grass cutting around the water source. The dominant indicator tree species normally found are Erythrina abysinica, Ficus thorgii and Phoenix recrinata. The animal watering troughs are usually used in the dry period. Before watering the troughs are coated (smeared) with red termite mound soil (normally hand carried by herders) to provide a good taste which is attractive to animals. Water is transferred from the pond to the water trough manually using cans or buckets. Animals drink directly from the troughs. This water from the trough is rich in iron (Fe) from red termite mound soil. The troughs are constructed with outlets used to spill out water immediately after drinking in order to prevent their damage through excessive water saturation.

Purpose of the Technology: This technology is preferred by livestock keepers as it provides for animals to drink clean and mineralized water and for health improvement. User fee payed to land owners also enable them to expand and diversify there income sources.

Establishment / maintenance activities and inputs: Establishment: Land clearing, excavation and shaping of water pond and construction of animal watering trough.
Maintenance: repair of water pond and water trough (de-siltation, grass slashing and gap refilling).
Inputs: labour, implements (machete, spade, hand hoe, sickle), clay, red termite mound soil, wooden poles, buckets, grass and tying rope. Average establishment cost for one pond and its water trough is 41.27 American dollars. Average annual maintenance and recurrent costs (filling and emptying of water trough) for one pond and its water trough stands at 458.76 dollars and labour is a core cost determinant factor.

Natural / human environment: Natural environment: Extensive grazing land. The technology is largely structural (excavation and shaping of water ponds and construction of water troughs) supported by the use of by-laws which prohibit destruction of the protective natural and indicative trees and grasses around. The technology is common in sub-humid climatic zone.
Social economic environment: Level of mechanization is handy tools with subsistence production systems on individual fields.

2.3 Photos de la Technologie

2.5 Pays/ région/ lieux où la Technologie a été appliquée et qui sont couverts par cette évaluation

2.6 Date de mise en œuvre de la Technologie

Si l'année précise est inconnue, indiquez la date approximative: :

• il y a plus de 50 ans (technologie traditionnelle)

2.7 Introduction de la Technologie

Spécifiez comment la Technologie a été introduite: :

• dans le cadre d'un système traditionnel (> 50 ans)

Commentaires (type de projet, etc.) :

the technology has been in use for about 80 years ago

3.2 Type(s) actuel(s) d'utilisation des terres, là où la Technologie est appliquée

Commentaires:

Major land use problems (compiler’s opinion): Eutrophication, siltation, water shortage, deforestation and wildfire outbreaks

Major land use problems (land users’ perception): Drying of the underground water source.
Constraints of mines and extractive industries
Constraints of settlement / urban
Constraints of infrastructure network (roads, railways, pipe lines, power lines)
Constraints of wastelands / deserts / glaciers / swamps
Constraints of recreation

3.3 Informations complémentaires sur l'utilisation des terres

Approvisionnement en eau des terres sur lesquelles est appliquée la Technologie:

• pluvial

Nombre de période de croissance par an: :

• 2

Précisez:

Longest growing period in days: 120Longest growing period from month to month: September to DecemberSecond longest growing period in days: 90Second longest growing period from month to month: March to May

Densité d'élevage/ chargement (si pertinent):

10-25 LU /km2

3.5 Diffusion de la Technologie

Spécifiez la diffusion de la Technologie:

• répartie uniformément sur une zone

Si la Technologie est uniformément répartie sur une zone, indiquez la superficie couverte approximative:

• < 0,1 km2 (10 ha)

Commentaires:

The area is owned by individual farmer. The area is found adjacent to extensive grazing land. Water table is high and there is a permanent underground natural water flows.

3.6 Mesures de GDT constituant la Technologie

Commentaires:

Specification of other structural measures: water collection pond and animal watering trough
Specification of other management measures: protect water source enclosure by naturally regenerating vegetation

3.7 Principaux types de dégradation des terres traités par la Technologie

Commentaires:

Main causes of degradation: deforestation / removal of natural vegetation (incl. forest fires) (cutting of natural tree and removal of grass along the natural water flow way), overgrazing (Compaction by trampling animals, rainfall runoff, siltation of water collection point and disapearence of vegatative cover.), discharges (point contamination of water) (spoilage and contamination of surface water by human and livestock feaces.), population pressure (Overstocking due to increase in the number of livestock), poverty / wealth (low capacity to invest in enviromental friendly energy sources), inputs and infrastructure: (roads, markets, distribution of water points, other, …) (Unavailable improved and reliable water ponds and animal watering troughs), education, access to knowledge and support services (limited knowledge on sustainable use of natural water sources), governance / institutional (limited enforcement of existing environmental regulatory systems.)

Secondary causes of degradation: soil management (excavation and layout that contradict the natural environment), crop management (annual, perennial, tree/shrub), over-exploitation of vegetation for domestic use (fire wood collection from the natural water source), industrial activities and mining, urbanisation and infrastructure development, release of airborne pollutants (urban/industry…), disturbance of water cycle (infiltration / runoff), over abstraction / excessive withdrawal of water (for irrigation, industry, etc.), other human induced causes (specify), change in temperature, change of seasonal rainfall, Heavy / extreme rainfall (intensity/amounts), wind storms / dust storms, floods, droughts, other natural causes (avalanches, volcanic eruptions, mud flows, highly susceptible natural resources, extreme topography, etc.) specify, land tenure, labour availability, war and conflicts

3.8 Prévention, réduction de la dégradation ou réhabilitation des terres dégradées

Spécifiez l'objectif de la Technologie au regard de la dégradation des terres:

• prévenir la dégradation des terres
• restaurer/ réhabiliter des terres sévèrement dégradées

4.1 Dessin technique de la Technologie

4.2 Spécification/ explications techniques du dessin technique

Water pond and water trough cross section view.
The water pond has an average internal capacity of size of 12m3 (4m length, 3m width and 1m depth).
Water troughs are constructed on the side of the water ponds. The water trough outside height is 0.2 - 0.4m above ground, inner depth is 0.5m, and diameter varies from 0.6 to 1m. It is made of cylindrical walls whose average width is 0.1m.
The average slope of the water catchment is 5% to 8%.

Location: Minziro village, Minziro ward, Missenyi division. Missenyi Dist, Kagera Reg, United Rep of Tanzania

Technical knowledge required for land users: moderate (At least primary school leaver with the basic indigenous technical knowledge.)

Main technical functions: control of dispersed runoff: retain / trap, control of concentrated runoff: retain / trap, water harvesting / increase water supply, improvement of water quality, buffering / filtering water

Secondary technical functions: improvement of ground cover, improvement of surface structure (crusting, sealing), stabilisation of soil (eg by tree roots against land slides), increase / maintain water stored in soil, increase of groundwater level / recharge of groundwater, water spreading, sediment retention / trapping, sediment harvesting, increase of biomass (quantity), control of fires, spatial arrangement and diversification of land use

Dam/ pan/ pond
Vertical interval between structures (m): 0
Spacing between structures (m): 10 to 20
Depth of ditches/pits/dams (m): 1
Width of ditches/pits/dams (m): 3
Length of ditches/pits/dams (m): 4
Height of bunds/banks/others (m): 0.3
Width of bunds/banks/others (m): 0.3
Length of bunds/banks/others (m): 4

Structural measure: water trough
Depth of ditches/pits/dams (m): 0.5
Width of ditches/pits/dams (m): 0.6 to 1
Length of ditches/pits/dams (m): 0.6 to 1
Height of bunds/banks/others (m): 0.2
Width of bunds/banks/others (m): 0.1
Length of bunds/banks/others (m): 0.6

Construction material (earth): mostry used clay soil and red termite mound soil.

Construction material (wood): for water pond and trough stabilization

Slope (which determines the spacing indicated above): 8%

If the original slope has changed as a result of the Technology, the slope today is: 8%

Lateral gradient along the structure: 5%

Specification of dams/ pans/ ponds: Capacity 10.6m3

Catchment area: 4 acresm2

For water harvesting: the ratio between the area where the harvested water is applied and the total area from which water is collected is: 1:4

Vegetation is used for stabilisation of structures.

4.3 Informations générales sur le calcul des intrants et des coûts

autre/ monnaie nationale (précisez):

Tanzanian shillings

Indiquer le taux de change du dollars en monnaie locale (si pertinent): 1 USD= :

1600,0

4.4 Activités de mise en place/ d'établissement

	Activité	Type de mesures	Calendrier
1.	Land preparation for pond excavation	Structurel	During dry season
2.	Construction of pond	Structurel	During dry period
3.	Construction of water trough	Structurel	During dry season

4.5 Coûts et intrants nécessaires à la mise en place

	Spécifiez les intrants	Unité	Quantité	Coûts par unité	Coût total par intrant	% des coût supporté par les exploitants des terres
Main d'œuvre	Land preparation for pond excavation	person/day	1,0	1,25	1,25	100,0
Main d'œuvre	Construction of pond	person/day	1,0	21,88	21,88	100,0
Main d'œuvre	Construction of water trough	person/day	1,0	3,13	3,13	100,0
Equipements	Tools	piece	1,0	3,13	3,13	100,0
Equipements	Tools	piece	3,0	9,38	28,14	100,0
Matériaux de construction	Wood	pieces	2,0	1,25	2,5	100,0
Matériaux de construction	Earth	kg	20,0	1,25	25,0	100,0
Coût total de mise en place de la Technologie					85,03

Commentaires:

Duration of establishment phase: 1 month(s)

4.6 Activités d'entretien/ récurrentes

	Activité	Type de mesures	Calendrier/ fréquence
1.	Desiltation	Structurel	During dry season
2.	Wall and bank strengthening and repair (reshaping and grass slashing/gap filling)	Structurel	During dry season
3.	Water trough repairing	Structurel	dry season
4.	Filling to and emptying water from water trough and collection and application of red termite mound soil.	Structurel

4.7 Coûts et intrants nécessaires aux activités d'entretien/ récurrentes (par an)

	Spécifiez les intrants	Unité	Quantité	Coûts par unité	Coût total par intrant	% des coût supporté par les exploitants des terres
Main d'œuvre	Desiltation	person days	5,0	6,25	31,25	100,0
Main d'œuvre	Wall and bank strengthening and repair (reshaping and grass slashing/gap filling)	person days	5,0	6,25	31,25	100,0
Main d'œuvre	Water trough repairing	person days	8,0	10,0	80,0	100,0
Main d'œuvre	Filling to and emptying water from water trough and collection and application of red termite mound soil.	person days	450,0	1,25	562,5	100,0
Equipements	Tools	pieces	2,0	5,0	10,0	100,0
Equipements	Water can	pieces	2,0	1,88	3,76	100,0
Matériaux de construction	Wood	pieces	6,0	3,75	22,5	100,0
Matériaux de construction	Earth	kg	60,0	3,75	225,0	100,0
Coût total d'entretien de la Technologie					966,26

Commentaires:

The cost is calculated per one water pond and its one trough and as per 28 August 2012

4.8 Facteurs les plus importants affectant les coûts

Décrivez les facteurs les plus importants affectant les coûts :

Labour is the most determinant factor affecting the costs

5.1 Climat

5.2 Topographie

5.3 Sols

5.4 Disponibilité et qualité de l'eau

5.6 Caractéristiques des exploitants des terres appliquant la Technologie

Indiquez toute autre caractéristique pertinente des exploitants des terres:

Difference in the involvement of women and men: little involvement of women because at large/traditionally livestock rearing is done by men.

Population density: 50-100 persons/km2

Annual population growth: 2% - 3%

5% of the land users are rich and own 5% of the land.
10% of the land users are average wealthy and own 35% of the land (the techology is used by rich and average livestock keepers who have the animal).
75% of the land users are poor and own 40% of the land (the village poors usually do not have the animals though most of them are cattle herders).
10% of the land users are poor and own 20% of the land.

5.7 Superficie moyenne des terres détenues ou louées par les exploitants appliquant la Technologie

5.8 Propriété foncière, droits d’utilisation des terres et de l'eau

Propriété foncière:

• communauté/ village
• individu, sans titre de propriété

Droits d’utilisation des terres:

• individuel

Droits d’utilisation de l’eau:

• communautaire (organisé)
• individuel

5.9 Accès aux services et aux infrastructures

6.1 Impacts sur site que la Technologie a montrés

Impacts socio-économiques

Production

Disponibilité et qualité de l'eau

Revenus et coûts

Impacts socioculturels

Impacts écologiques

Cycle de l'eau/ ruissellement

Sols

Biodiversité: végétale, animale

Réduction des risques de catastrophe et des risques climatiques

6.2 Impacts hors site que la Technologie a montrés

6.3 Exposition et sensibilité de la Technologie aux changements progressifs et aux évènements extrêmes/catastrophes liés au climat (telles que perçues par les exploitants des terres)

Changements climatiques progressifs

Changements climatiques progressifs

	Saison	Type de changements/ extrêmes climatiques	Comment la Technologie fait-elle face à cela?
températures annuelles		augmente	bien

Extrêmes climatiques (catastrophes)

Catastrophes météorologiques

	Comment la Technologie fait-elle face à cela?
pluie torrentielle locale	pas bien
tempête de vent locale	bien

Catastrophes climatiques

	Comment la Technologie fait-elle face à cela?
sécheresse	bien

Catastrophes hydrologiques

	Comment la Technologie fait-elle face à cela?
inondation générale (rivière)	pas bien

Autres conséquences liées au climat

Autres conséquences liées au climat

	Comment la Technologie fait-elle face à cela?
réduction de la période de croissance	pas connu

Commentaires:

Improving structure on the pond (use impermeable materials to prevent seepage, use concrete as a building material)

6.4 Analyse coûts-bénéfices

Quels sont les bénéfices comparativement aux coûts de mise en place (du point de vue des exploitants des terres)?

Quels sont les bénéfices comparativement aux coûts d'entretien récurrents (du point de vue des exploitants des terres)?

Commentaires:

The technology requires low establishment and maintenance cost and benefit surpass the costs.

6.5 Adoption de la Technologie

Parmi tous ceux qui ont adopté la Technologie, combien d'entre eux l'ont fait spontanément, à savoir sans recevoir aucune incitation matérielle ou aucun paiement?

• 10-50%

Commentaires:

12% of land user families have adopted the Technology without any external material support

250 land user families have adopted the Technology without any external material support
All livestock keepers use the technology to water their animals voluntary and through self mobilization.
There is a moderate trend towards spontaneous adoption of the Technology
The technology is cheap and requires low investment costs.

6.7 Points forts/ avantages/ possibilités de la Technologie

Points forts/ avantages/ possibilités du point de vue de l'exploitant des terres
Income generation due to water use fee. How can they be sustained / enhanced? improve service to water users. .

Points forts/ avantages/ possibilités du point de vue du compilateur ou d'une autre personne ressource clé
Reduce conflict between livestock keepers and domestic water users. How can they be sustained / enhanced? Bylaws reinforcement, Area enclosure and Demarcation
Improve accessibility of water to animals (improved animal water intake) How can they be sustained / enhanced? sensitization on regular maintenance.

6.8 Faiblesses/ inconvénients/ risques de la Technologie et moyens de les surmonter

Faiblesses/ inconvénients/ risques du point de vue de l’exploitant des terres	Comment peuvent-ils être surmontés?
Not durable and requires frequent and regular maintenance	Sensitize on regular maintenance.

Faiblesses/ inconvénients/ risques du point de vue du compilateur ou d'une autre personne ressource clé	Comment peuvent-ils être surmontés?
not durable	Sensitize on regular maintenance.
high labor demand to fill the troughs	Use simple leverage pump

7.2 Références des publications disponibles

Titre, auteur, année, ISBN:

Kagera TAMP project website

Disponible à partir d'où? Coût?

http://www.fao.org/nr/kagera/en/