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Technologies
Inactive

Digue anti-sel et de retenue des eaux de ruissellement [Senegal]

O Pang

technologies_1748 - Senegal

Completeness: 37%

1. General information

1.2 Contact details of resource persons and institutions involved in the assessment and documentation of the Technology

Key resource person(s)

SLM specialist:
SLM specialist:

Babacar Ibrahima Birham Bass

ADAF / YUNGAR

Village De Fimela Fimela, Senegal

Senegal

SLM specialist:

Baboucar Gning

République du sénégal - Ministère des Ecovillages, des Bassins de Rétention, des Lacs artificiels et de la Pisciculture - Projet d'appui à la petite irrigation locale (PAPIL)

Senegal

Name of the institution(s) which facilitated the documentation/ evaluation of the Technology (if relevant)
CDE Centre for Development and Environment (CDE Centre for Development and Environment) - Switzerland
Name of the institution(s) which facilitated the documentation/ evaluation of the Technology (if relevant)
Ministère des Ecovillages, des Bassins de Rétention, des Lacs artificiels et de la Pisciculture - Projet d'appui à la petite irrigation locale (PAPIL) - Senegal
Name of the institution(s) which facilitated the documentation/ evaluation of the Technology (if relevant)
ADAF / YUNGAR Consultants agricoles - Senegal

1.3 Conditions regarding the use of data documented through WOCAT

When were the data compiled (in the field)?

15/12/2010

The compiler and key resource person(s) accept the conditions regarding the use of data documented through WOCAT:

Yes

2. Description of the SLM Technology

2.1 Short description of the Technology

Definition of the Technology:

Une technologie permettant de retenir les eaux de ruissellement et de reduire la salinité des terres.

2.2 Detailed description of the Technology

Description:

Ouvrage constitué d un déversoir central en beton armé de 30 m et d'une digue en terre de 400 m.

2.3 Photos of the Technology

2.5 Country/ region/ locations where the Technology has been applied and which are covered by this assessment

Country:

Senegal

Region/ State/ Province:

Région de Fatick, Département de Fatick

Further specification of location:

Arrondissement de Fimela, Communauté rurale de Fimela

2.6 Date of implementation

If precise year is not known, indicate approximate date:
  • less than 10 years ago (recently)

2.7 Introduction of the Technology

Specify how the Technology was introduced:
  • through projects/ external interventions
Comments (type of project, etc.):

2009

3. Classification of the SLM Technology

3.1 Main purpose(s) of the Technology

  • reduce, prevent, restore land degradation

3.2 Current land use type(s) where the Technology is applied

Mixed (crops/ grazing/ trees), incl. agroforestry

Mixed (crops/ grazing/ trees), incl. agroforestry

  • Agro-silvopastoralism
Comments:

Principaux problèmes d'utilisation des sols (perception des utilisateurs fonciers): absence d'activités agricoles et de patures à cause d'une forte salinisation des sols et de la nappe

Usage futur (final) de la terre (après la mise en œuvre de la technologie SLM): Mélangé: Mp: Agro-pastoralisme

If land use has changed due to the implementation of the Technology, indicate land use before implementation of the Technology:

Mélangé: Ma: Agro-silvopastoralisme

3.4 SLM group to which the Technology belongs

  • cross-slope measure
  • Digue anti-sel

3.5 Spread of the Technology

Comments:

Total area covered by the SLM Technology is 1 m2.

superficie sous influence de la digue

3.6 SLM measures comprising the Technology

structural measures

structural measures

  • S5: Dams, pans, ponds
Comments:

Main measures: structural measures

3.7 Main types of land degradation addressed by the Technology

chemical soil deterioration

chemical soil deterioration

  • Cs: salinization/ alkalinization
biological degradation

biological degradation

  • Bc: reduction of vegetation cover
water degradation

water degradation

  • Hg: change in groundwater/aquifer level
Comments:

Main type of degradation addressed: Cs: salinisation / alcalinisation

Secondary types of degradation addressed: Bc: réduction de la couverture végétale, Hg: modification dans les nappes phréatiques et aquifères

Main causes of degradation: déforestation / disparition de la végétation naturelle (inclus les feux de forêts) (déforestation due à la coupe de la mangrove), surexploitation de la végétation pour l’usage domestique (surexploitation liée à la pauvreté), sécheresses, autres causes naturelles (avalanches, éruptions volcaniques, topographie extrême, coulée de boue, etc.) Spécifier. (intrusion de l'eau salée)

Secondary causes of degradation: pression de la population, pauvreté / santé, gouvernance / institutionnel (absence de conventions en rapport avec l utilisation des ressources naturelles et octroie de permis aux allochthones)

3.8 Prevention, reduction, or restoration of land degradation

Specify the goal of the Technology with regard to land degradation:
  • restore/ rehabilitate severely degraded land
Comments:

Main goals: rehabilitation / reclamation of denuded land

Secondary goals: prevention of land degradation, mitigation / reduction of land degradation

4. Technical specifications, implementation activities, inputs, and costs

4.2 Technical specifications/ explanations of technical drawing

Principales fonctions techniques: contrôle du ruissellement en nappe: rétention / capture, récupération de l'eau / augmentation des réserves d'eau, amélioration de la qualité de l'eau, eau filtrée / solution tampon

Fonctions techniques secondaires: contrôle de la battance ('splash'), augmentation du niveau / recharge de la nappe phréatique

Barrage / poêle / étang
Longueur des bunds / banques / autres (m): 430.00

Matériaux de construction (autre): 30 m de béton + 200 m en terre (latérite) de chaque côté

4.4 Establishment activities

Activity Type of measure Timing
1. Fondation Structural

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