Stone faced level bund [Ethiopia]
- Creation:
- Update:
- Compiler: Unknown User
- Editor: –
- Reviewers: Fabian Ottiger, Alexandra Gavilano
Daagd dagaafi Biyye
technologies_1047 - Ethiopia
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Expand all Collapse all1. 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:
Niguse Worku
Rural hand & M/Resource Authority Chiro
Ethiopia
SLM specialist:
Dessalegn Ishetu
Rural hand & M/Resource Authority Chiro
Ethiopia
1.3 Conditions regarding the use of data documented through WOCAT
The compiler and key resource person(s) accept the conditions regarding the use of data documented through WOCAT:
Yes
1.5 Reference to Questionnaire(s) on SLM Approaches (documented using WOCAT)
Local Level Participatory Planning (LLPPA) [Ethiopia]
LLPPA
- Compiler: Philippe Zahner
2. Description of the SLM Technology
2.1 Short description of the Technology
Definition of the Technology:
Stone faced bund is embankment constructed from stone & soil along the contour at upper part to reduce velocity of run of & length of slope with collection ditch in the uper part.
2.2 Detailed description of the Technology
Description:
Description:- is constructed from soil embankment at the upper part. The layer of regular sheped stone embankement at lower side along the contour line. Excavated collection ditch at the uper part. Have sound foundation at lower side. Has a berm between collection ditch & soil embankement. Purpose:- To cut longer slopes into series of slopes. To increase time of concentration & infiltration rate. To decrease velocity of run off. To colect top soil, as a result to protect erosion, to increase yield at last forming a bench. Establishment/ maintenance:- Layout contour line across the slope remark the line of collection ditch, construct embandkment of soil with compaction & construct stone embankment in the outer (lower) side & requires proper foundation. Arranage the labour forces & require external inputs. Environment:- Low rain fall area, less soil depth & moisture stressed areas, low prolduction (yield) areas, on cultivated land use type, which have 8-30% slope.
2.5 Country/ region/ locations where the Technology has been applied and which are covered by this assessment
Country:
Ethiopia
Region/ State/ Province:
Oromia
Further specification of location:
Oromiya Chiro wab
Comments:
Total area covered by the SLM Technology is 11.83 km2.
Most of the activities were not done due to lack (constraints) of incentive foods at present only gara nigus of sorrow no. sites are functional.
Map
×2.6 Date of implementation
If precise year is not known, indicate approximate date:
- more than 50 years ago (traditional)
2.7 Introduction of the Technology
Specify how the Technology was introduced:
- through projects/ external interventions
Comments (type of project, etc.):
National natural resource development of conservation dept.
3. Classification of the SLM Technology
3.2 Current land use type(s) where the Technology is applied
Cropland
- Annual cropping
- Perennial (non-woody) cropping
- Tree and shrub cropping
Annual cropping - Specify crops:
- cereals - maize
- cereals - sorghum
- cowpeas
- chat
- coffee
Number of growing seasons per year:
- 2
Specify:
Longest growing period in days: 250 Longest growing period from month to month: Apr - Dec Second longest growing period in days: 180 Second longest growing period from month to month: Apr - Sep
Is crop rotation practiced?
Yes
If yes, specify:
sorghum 2st, the maize, sorghum with maize, maize the cow pea.
Comments:
Major land use problems (compiler’s opinion): Absence of applications of land use & forest policy shortage of farm cultivated land. Absence of responsibility to develop protect all land use type population growth pressure, High way run off desposal structure. Intensive cultivation of land.
Major land use problems (land users’ perception): Shortage of farm land; population growth (Increase of family size) decrease of production yield of farm; soil errosion, monocropping system povertiy.
Type of cropping system and major crops comments: Annual croping:- sorghum 2st, the maize, sorghum with maize, maize the cow pea.
3.4 Water supply
Water supply for the land on which the Technology is applied:
- rainfed
3.5 SLM group to which the Technology belongs
- cross-slope measure
3.6 SLM measures comprising the Technology
3.7 Main types of land degradation addressed by the Technology
soil erosion by water
- Wt: loss of topsoil/ surface erosion
chemical soil deterioration
- Cn: fertility decline and reduced organic matter content (not caused by erosion)
water degradation
- Ha: aridification
Comments:
Main type of degradation addressed: Wt: loss of topsoil / surface erosion
Secondary types of degradation addressed: Cn: fertility decline and reduced organic matter content, Ha: aridification
3.8 Prevention, reduction, or restoration of land degradation
Specify the goal of the Technology with regard to land degradation:
- prevent land degradation
- reduce land degradation
Comments:
Main goals: prevention of land degradation
Secondary goals: mitigation / reduction of land degradation
4. Technical specifications, implementation activities, inputs, and costs
4.1 Technical drawing of the Technology
Technical specifications (related to technical drawing):
Technical knowledge required for field staff / advisors: moderate
Technical knowledge required for land users: high
Main technical functions: reduction of slope length, increase / maintain water stored in soil, water harvesting / increase water supply, sediment retention / trapping, sediment harvesting
Secondary technical functions: increase of infiltration, improvement of soil structure, increase in soil fertility
Bund/ bank: level
Vertical interval between structures (m): 1-1.5
Spacing between structures (m): 10
Height of bunds/banks/others (m): 0.75
Width of bunds/banks/others (m): 1.5
Length of bunds/banks/others (m): 50m
Construction material (earth): Excavated soil from collection ditch
Construction material (stone): Suitable shape & size of stones collected from the farm.
Slope (which determines the spacing indicated above): 15%
If the original slope has changed as a result of the Technology, the slope today is: 12%
4.2 General information regarding the calculation of inputs and costs
other/ national currency (specify):
Birr
If relevant, indicate exchange rate from USD to local currency (e.g. 1 USD = 79.9 Brazilian Real): 1 USD =:
8.6
Indicate average wage cost of hired labour per day:
0.80
4.3 Establishment activities
Activity | Timing (season) | |
---|---|---|
1. | Digging of collection ditch (trench) | dry season |
2. | Surveying | dry season |
3. | Surveying | After stanest |
4. | Stablization of bunds with stone | dry season |
5. | Construction of soil embankment | dry season |
4.4 Costs and inputs needed for establishment
Specify input | Unit | Quantity | Costs per Unit | Total costs per input | % of costs borne by land users | |
---|---|---|---|---|---|---|
Labour | Labour | ha | 1.0 | 125.0 | 125.0 | 100.0 |
Labour | Weeding & cultivation land pre | ha | 1.0 | 24.8 | 24.8 | |
Equipment | Tools | ha | 1.0 | 3.3 | 3.3 | |
Plant material | Seeds | ha | 1.0 | 3.3 | 3.3 | |
Fertilizers and biocides | Fertilizer | ha | 1.0 | 33.3 | 33.3 | |
Total costs for establishment of the Technology | 189.7 | |||||
Total costs for establishment of the Technology in USD | 22.06 |
Comments:
Duration of establishment phase: 60 month(s)
4.5 Maintenance/ recurrent activities
Activity | Timing/ frequency | |
---|---|---|
1. | Rearange the (collaps) fallen stones | At the end of rains season/At the end of rains season/Each croping season |
2. | Regilling of collapsed embankment | At the end of rain/ " " " |
3. | Distilled the collection ditch | At the begin of rain season/ " " |
4.6 Costs and inputs needed for maintenance/ recurrent activities (per year)
Specify input | Unit | Quantity | Costs per Unit | Total costs per input | % of costs borne by land users | |
---|---|---|---|---|---|---|
Labour | Weeding & cultivation land pre | ha | 1.0 | 24.8 | 24.8 | |
Equipment | Tools | ha | 1.0 | 3.3 | 3.3 | 71.0 |
Plant material | Seeds | ha | 1.0 | 3.3 | 3.3 | |
Fertilizers and biocides | Fertilizer | ha | 1.0 | 33.3 | 33.3 | |
Total costs for maintenance of the Technology | 64.7 | |||||
Total costs for maintenance of the Technology in USD | 7.52 |
Comments:
An average length = 1000m, Width of stone 20cm, width of eather 80 cm
4.7 Most important factors affecting the costs
Describe the most determinate factors affecting the costs:
Availability of local materials, the steepyness of site, soil type.
5. Natural and human environment
5.1 Climate
Annual rainfall
- < 250 mm
- 251-500 mm
- 501-750 mm
- 751-1,000 mm
- 1,001-1,500 mm
- 1,501-2,000 mm
- 2,001-3,000 mm
- 3,001-4,000 mm
- > 4,000 mm
Agro-climatic zone
- sub-humid
- semi-arid
5.2 Topography
Slopes on average:
- flat (0-2%)
- gentle (3-5%)
- moderate (6-10%)
- rolling (11-15%)
- hilly (16-30%)
- steep (31-60%)
- very steep (>60%)
Landforms:
- plateau/plains
- ridges
- mountain slopes
- hill slopes
- footslopes
- valley floors
Altitudinal zone:
- 0-100 m a.s.l.
- 101-500 m a.s.l.
- 501-1,000 m a.s.l.
- 1,001-1,500 m a.s.l.
- 1,501-2,000 m a.s.l.
- 2,001-2,500 m a.s.l.
- 2,501-3,000 m a.s.l.
- 3,001-4,000 m a.s.l.
- > 4,000 m a.s.l.
5.3 Soils
Soil depth on average:
- very shallow (0-20 cm)
- shallow (21-50 cm)
- moderately deep (51-80 cm)
- deep (81-120 cm)
- very deep (> 120 cm)
Soil texture (topsoil):
- coarse/ light (sandy)
Topsoil organic matter:
- medium (1-3%)
- low (<1%)
If available, attach full soil description or specify the available information, e.g. soil type, soil PH/ acidity, Cation Exchange Capacity, nitrogen, salinity etc.
Soil fertility is low-medium
Soil drainage/infiltration is good-medium
Soil water storage capacity is low-medium
5.6 Characteristics of land users applying the Technology
Market orientation of production system:
- subsistence (self-supply)
Off-farm income:
- less than 10% of all income
Relative level of wealth:
- very poor
- poor
Level of mechanization:
- manual work
- animal traction
Indicate other relevant characteristics of the land users:
Annual population growth: 3% - 4%
and own 25% of the land.
and own 55% of the land.
and own 15% of the land.
Off-farm income specification: No. marked differences between them
Level of mechanization: Animal traction (very exuastive power) and manual labour
5.8 Land ownership, land use rights, and water use rights
Land ownership:
- state
- individual, not titled
6. Impacts and concluding statements
6.1 On-site impacts the Technology has shown
Socio-economic impacts
Production
crop production
Comments/ specify:
Mainly in bad season
production area
Comments/ specify:
Due to qualitiness
Income and costs
workload
Comments/ specify:
It is labour intensive work
Socio-cultural impacts
SLM/ land degradation knowledge
Ecological impacts
Soil
soil moisture
soil loss
Other ecological impacts
Biodiversity
Soil fertility
6.2 Off-site impacts the Technology has shown
reliable and stable stream flows in dry season
downstream flooding
6.4 Cost-benefit analysis
How do the benefits compare with the establishment costs (from land users’ perspective)?
Short-term returns:
slightly positive
Long-term returns:
slightly negative
How do the benefits compare with the maintenance/ recurrent costs (from land users' perspective)?
Short-term returns:
positive
Long-term returns:
positive
6.5 Adoption of the Technology
Comments:
Comments on acceptance with external material support: estimates
Comments on spontaneous adoption: estimates
There is no trend towards spontaneous adoption of the Technology
Comments on adoption trend: The poor economy makes them not to adapt spontanously
6.7 Strengths/ advantages/ opportunities of the Technology
Strengths/ advantages/ opportunities in the land user’s view |
---|
Increase yield (production) How can they be sustained / enhanced? Continously apply as technology desgined. |
Control of run off How can they be sustained / enhanced? Protect it from damage |
Sediment harvesting How can they be sustained / enhanced? Maintain it freguently |
Moisture (water) harvesting How can they be sustained / enhanced? Awareness creastion (capacity building of community) |
Keeps soil from washing away How can they be sustained / enhanced? Look after it after accompalishiment of activity. |
Strengths/ advantages/ opportunities in the compiler’s or other key resource person’s view |
---|
Reduction of slope length How can they be sustained / enhanced? Serious follow up & maintenance |
Control of dispersed run off How can they be sustained / enhanced? Reduce cattle interference (keep from interference |
Increase moisture content of soil How can they be sustained / enhanced? Integerate it with other biological measures (agronomic & vegetative) |
Reduce run off velocity How can they be sustained / enhanced? Increase (build) the knowledge & skills of land users. Strengthen institution. |
Reduce off farm site flooding How can they be sustained / enhanced? Follow up after the life span of project (activity) |
6.8 Weaknesses/ disadvantages/ risks of the Technology and ways of overcoming them
Weaknesses/ disadvantages/ risks in the land user’s view | How can they be overcome? |
---|---|
It takes pieces of land | Minimize the width |
Easily damaged by cattle interference | Must be re-established & freguently maintained, use good shape of stones, |
High labour intensive takes (consume) time & energy | By paying good incentives. |
The ** ridges makes gully | Alternate it when make the structure |
Difficult to do to women | Create (invent) eas** condition for women |
Weaknesses/ disadvantages/ risks in the compiler’s or other key resource person’s view | How can they be overcome? |
---|---|
Easly collapsed by cattle interference | Protect from damage keep its quality & technical standards when it is used. |
High labour intensive & needs incentive support | Allocate inputs (Incentives) for its. |
Needs technical assistance (application) Need very good design & continous suppervision | Capacity building of community & workers. |
Reguers serious follow up & maintenance | Continous follow up after establishment & maintence |
Takes long time to stablize | Integerate with other technology, ensure continous technological suport measures. |
7. References and links
7.1 Methods/ sources of information
Links and modules
Expand all Collapse allLinks
Local Level Participatory Planning (LLPPA) [Ethiopia]
LLPPA
- Compiler: Philippe Zahner
Modules
No modules