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

Nom du projet qui a facilité la documentation/ l'évaluation de la Technologie (si pertinent)

Sustainable Land Management Project, Bhutan (SLMP)

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

HELVETAS (Swiss Intercooperation)

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

Aga Khan Foundation (AKF) - Suisse

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

Sustainable Land Management Institute Organistatio (Sustainable Land Management Institute Organistatio) - Afghanistan

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

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

01/10/2015

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

Oui

2.1 Courte description de la Technologie

Définition de la Technologie:

Earthen trenches with soil bunds built along contours in staggered design

2.2 Description détaillée de la Technologie

Description:

The SCTs technology is documented by Sustainable Land Management Project/HELVETAS Swiss Intercooperation which is funded by Swiss Agency for Development and Cooperation (SDC), with close support and cooperation of the Agha Khan Foundation (AKF). The staggered Contour Trenches (SCTs) were constructed at a degraded site in Bamyan center (Bamyan province) by Agha Khan Foundation (AKF) project with financial support of the Canadian International Development Agency (CIDA).
Totally 1470 contour trenches were constructed at the site, which has an area of 24 hectares.
The size of each trench measured 10 m in length, 0.6 m in width and 0.5 m in depth. The trenches had soil bunds on the lower side having a width of 1 m and height of 0.3 m. Contour lines were prepared using an A-frame and lime and the spacing between two contour lines was 8 m considering the slope. All the trenches were dug out manually. Local people were employed for construction works. Along with the SCTs, other measures were applied such as plantation of fodder grass, shrub and non-fruit trees, gully plugs, water harvesting tanks and brushwood plugs. The area is excluded from grazing and shrub cutting.

The land was extensive grazing land before the project implementation and got extremely degraded due to a lack of management by the land users. There was rampant exploitation of natural vegetation for meeting domestic energy needs and for grazing. Droughts, which frequently occur in the region, contributed to the slow degradation of the vegetation.

Purpose of the Technology: The main purpose of the technology is to reduce flash flood risks and improve land productivity (both upstream and downstream) so that more fodder, fuel wood and fruits could be produced and farmers affected by flash floods could grow more crops. The technology, which is part of a watershed technology system, helps in retaining runoff and sediment and improves soil moisture content. It also helps in water infiltration which eventually contributes to improved ground water recharge.

Establishment / maintenance activities and inputs: SCTs were established in a step-wise manner; as follows: (1) Site surveying, (2) Site mapping, (3) Planning, (4) Marking contour lines with the help of an A-frame, and (5) Trench excavation and bund construction.

The establishment cost for staggered contour trenches, was about 15,500 USD or 645 USD/ha. Most of the money was spent on labour. There have been no expenses in maintenance of SCTs since their establishment in 2008.

Natural / human environment: The technology is applied in semi-arid condition as the area receives annual rainfall of about 400 mm to address land degradation. The site formally belonged to the state but the local communities have use rights. AKF is still maintaining the site and using it for training and demonstration purpose. Several exposure visits for SLM specialist, land users, students and teachers have been also organized at the site.

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 moins de 10 ans (récemment)

2.7 Introduction de la Technologie

Spécifiez comment la Technologie a été introduite: :

• par le biais de projets/ d'interventions extérieures

3.1 Principal(aux) objectif(s) de la Technologie

• améliorer la production
• réduire les risques de catastrophes

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

Commentaires:

Major land use problems (compiler’s opinion): Flash floods, gully/rill/sheet erosion, loss of natural vegetation and low productivity of the land due to degradation compounded by climatic factors.

Major land use problems (land users’ perception): Declining productivity of land resulting in shortages of fodder and fuel wood and loss of fertile land in the downstream areas due to flash floods.

Grazingland comments: The area is closed for livestock.

Future (final) land use (after implementation of SLM Technology): Forests / woodlands: Fp: Plantations, afforestations

Type of grazing system comments: The area is closed for livestock.

Si l'utilisation des terres a changé en raison de la mise en œuvre de la Technologie, indiquez l'utilisation des terres avant la mise en œuvre de la Technologie:

Grazing land: Ge: Extensive grazing land

3.3 Informations complémentaires sur l'utilisation des terres

Nombre de période de croissance par an: :

• 1

Précisez:

Longest growing period in days: 180; Longest growing period from month to month: April to September

Densité d'élevage/ chargement (si pertinent):

1-10 LU /km2

3.4 Groupe de GDT auquel appartient la Technologie

• fermeture de zones (arrêt de tout usage, appui à la réhabilitation)
• mesures en travers de la pente
• gestion des eaux souterraines

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:

• 0,1-1 km2

Commentaires:

Total area covered by the SLM Technology is 0.24 km2.

3.6 Mesures de GDT constituant la Technologie

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), over-exploitation of vegetation for domestic use, overgrazing

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:

• réduire la dégradation des terres

4.1 Dessin technique de la Technologie

4.2 Spécification/ explications techniques du dessin technique

A detailed staggered contour trenches layout and its specifications (Fig. 1), and the cross section of soil bunds (Fig. 2)

Location: Bamyan. Bamyan center/Bamyan province

Technical knowledge required for land users: high

Technical knowledge required for SLM specialist: high

Main technical functions: control of dispersed runoff: retain / trap, increase of infiltration, sediment retention / trapping, sediment harvesting, increase of biomass (quantity), promotion of vegetation species and varieties (quality, eg palatable fodder)

Secondary technical functions: reduction of slope length, improvement of ground cover, increase in organic matter, increase / maintain water stored in soil, improvement of water quality, buffering / filtering water, spatial arrangement and diversification of land use

Retention/infiltration ditch/pit, sediment/sand trap
Spacing between structures (m): 8

Bund/ bank: level
Spacing between structures (m): 8
Height of bunds/banks/others (m): 0.5

4.3 Informations générales sur le calcul des intrants et des coûts

Spécifiez la manière dont les coûts et les intrants ont été calculés:

• par superficie de la Technologie

Indiquez la monnaie utilisée pour le calcul des coûts:

• dollars US

4.4 Activités de mise en place/ d'établissement

	Activité	Type de mesures	Calendrier
1.	Digging of the contour trenches and construction of the soil bunds	Structurel
2.	Marking contour lines (A frame and lime)	Structurel

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	Digging of the contour trenches and construction of the soil bunds	persons/day/ha	100,0	6,43	643,0
Equipements	A frame and lime	ha	1,0	1,8	1,8
Coût total de mise en place de la Technologie					644,8

Commentaires:

Duration of establishment phase: 4 month(s)

4.6 Activités d'entretien/ récurrentes

	Activité	Type de mesures	Calendrier/ fréquence
1.	No maintenance activities have been implemented for staggered contour trenches and soil bunds up to now.	Structurel

4.8 Facteurs les plus importants affectant les coûts

Décrivez les facteurs les plus importants affectant les coûts :

Despite the application of the structural measure of the SCTs AKF is still continuing its financial support for the plantation of the area. Thus irrigation which is a costly activity is still continued by AKF's support. The planted saplings of fruit and non-fruit trees are irrigated for six months/year, i.e. from April to September. Water is carried to the site by tankers. Each month, 75 tankers are used and the cost of one tanker is 12 USD or 600 Afghani. In addition, 16 persons are employed for one time irrigation.

5.1 Climat

5.2 Topographie

5.3 Sols

Si disponible, joignez une description complète du sol ou précisez les informations disponibles, par ex., type de sol, pH/ acidité du sol, capacité d'échange cationique, azote, salinité, etc.

Soil fertility is very low - low

Soil drainage / infiltration is oor due to sealing

Soil water storage capacity is low

5.4 Disponibilité et qualité de l'eau

5.5 Biodiversité

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: Mainly men were involved in the activities due to cultural reasons.

Population density: 10-50 persons/km2

Annual population growth: 3% - 4%

100% of the land users are average wealthy.

Off-farm income specification: This is more applicable for poor small landholders or landless families.

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:

• état

Droits d’utilisation des terres:

• accès libre (non organisé)

Droits d’utilisation de l’eau:

• accès libre (non organisé)

Commentaires:

Formally, state owned. The site is now protected from open grazing and shrub cutting with support from the local communities.

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?
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	bien

Commentaires:

SCT must be combined with vegetation and management measures

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 benefits stated are the combined impacts of all measures-structural, vegetative and management. SCTs have helped in the establishment of vegetative measures by contributing to increased soil moisture, reduced runoff and soil loss.

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?

• 90-100%

Commentaires:

Comments on acceptance with external material support: The whole project activities were implemented by external supports

There is no trend towards spontaneous adoption of the Technology

Comments on adoption trend: As the implementation of a watershed project requires high costs and investments which can not be affordable for the individual land users.

6.7 Points forts/ avantages/ possibilités de la Technologie

Points forts/ avantages/ possibilités du point de vue de l'exploitant des terres
The land users views were not considered.

Points forts/ avantages/ possibilités du point de vue du compilateur ou d'une autre personne ressource clé
Helps in reducing flash flood risks due to less runoff How can they be sustained / enhanced? Proper institutional mechanisms, involving the government, non-government and community institutions should be developed for sustaining project activities. Department of Agriculture, Irrigation and Livestock DAIL; (Bamyan) should take lead
Conserves soil and enhances soil cover and fertility leading to more on-site production How can they be sustained / enhanced? Vegetative measures should be strengthened
Complements re-greening efforts by reducing erosion and conserving moisture
The quality of contour trenches and soil bunds are very good and maintenance costs negligible
The site is used for demonstration, training and exposure visits

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

Faiblesses/ inconvénients/ risques du point de vue du compilateur ou d'une autre personne ressource clé	Comment peuvent-ils être surmontés?
Establishment costs are very high	Voluntary community contributions, if they have an active stake in the project, would reduce the costs, otherwise, there has to be external support at least for the establishment phase
Loss of land for production	Planting suitable plants inside the trenches and along soil bunds
Requires high level of technical knowledge for establishment	Practical training for the target groups