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

Name of the institution(s) which facilitated the documentation/ evaluation of the Technology (if relevant)

Agricultural Research and Extension Authority (AREA) - Yemen

Name of the institution(s) which facilitated the documentation/ evaluation of the Technology (if relevant)

General Directorate of Irrigation - Yemen

1.3 Conditions regarding the use of data documented through WOCAT

When were the data compiled (in the field)?

12/02/2013

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

Ja

2.1 Short description of the Technology

Definition of the Technology:

The stone existed in the region are used for building diversion constructions to raise the level of wadi bed to the level of the inlet of the cultivated land that need to be irrigated from water harvesting in addition to distribution channels in the fields

2.2 Detailed description of the Technology

Description:

Diversion construction (DC) technology is one the structural solutions using stones with slope and tan 30 to slow the water flow and to deposits the carried materials with water to allow water to pass throw the inlet (gate) to the fields that need to be irrigated without damaged mainly vines and qat crops. The site of DC must be built in direction of water flow to direct it to pass to the fields need to be irrigated to get a benefit from this water harvested the height of the DC should be equalled to the height of the cultivated land which ranges between 2-4 meter and the width is 1.5 meter and the length is ranged between 40-60 meter based on the width of wadi bed. The DC should not built totally in one time but should be gradually and by the time as a result of deposit be come at the same level of fields need to irrigated. Finally when the height of DC become equally to level of the field need to irrigated the gate should be determined according to water requirement of cultivated crops. After that distribution channels should built at 1-2 wide, 0.5- 0.8 height and 10-100 length. Such as this type of technology is considered a long term process in the past due to lack of equipments and implements. However now it can be done in short time if all requirement provided especially funds and equipments.

2.3 Photos of the Technology

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

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:

• as part of a traditional system (> 50 years)

Comments (type of project, etc.):

It is a very ancient technology but was rehabilitated in 1956 by the community

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

Comments:

Major land use problems (compiler’s opinion): Low productivity due to a lack of water (drought)

Major land use problems (land users’ perception): drought

Future (final) land use (after implementation of SLM Technology): Cropland: Ct: Tree and shrub cropping

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

Cropland: Ct: Tree and shrub cropping

3.3 Further information about land use

Water supply for the land on which the Technology is applied:

• rainfed

Comments:

Water supply: Also mixed rainfed - irrigated and post-flooding

Number of growing seasons per year:

• 1

Specify:

Longest growing period in days: 90

3.4 SLM group to which the Technology belongs

• cross-slope measure
• water diversion and drainage

3.5 Spread of the Technology

Comments:

Total area covered by the SLM Technology is 20.6 m2.

Alrawanah Bani Hushaish, which is located on the eastern side of the capital Sanaa, and is about 16 km away

3.6 SLM measures comprising the Technology

Comments:

Specification of other structural measures: Diversion construction with gates and distribution channels

3.7 Main types of land degradation addressed by the Technology

Comments:

Secondary types of degradation addressed: Cn: fertility decline and reduced organic matter content

Main causes of degradation: floods, droughts, poverty / wealth (poverty)

Secondary causes of degradation: crop management (annual, perennial, tree/shrub) (up takes of major elements of fertility without subsistent)

3.8 Prevention, reduction, or restoration of land degradation

Specify the goal of the Technology with regard to land degradation:

• reduce land degradation
• restore/ rehabilitate severely degraded land

Comments:

Secondary goals: mitigation / reduction of land degradation

4.1 Technical drawing of the Technology

4.2 Technical specifications/ explanations of technical drawing

Barrier cuts waterway with gates and distribution channels

Location: Alrawanah Uzlat. Bani Hushaish district

Technical knowledge required for field staff / advisors: high (Construction process requires skills and experiences)

Technical knowledge required for land users: low (Has sufficient expertise)

Main technical functions: water harvesting / increase water supply, water spreading

Secondary technical functions: increase in nutrient availability (supply, recycling,…), increase of groundwater level / recharge of groundwater, Reduce runoff

Structural measure: Diversion construction
Height of bunds/banks/others (m): 2 - 4
Width of bunds/banks/others (m): 1– 1.5

Structural measure: Gates
Height of bunds/banks/others (m): 0.5 -1
Width of bunds/banks/others (m): 0.7–1.2

Structural measure: Channels
Height of bunds/banks/others (m): 0.5–0.8
Width of bunds/banks/others (m): 1 - 2
Length of bunds/banks/others (m): 10-100

Construction material (stone): The diversion construction and the gates are constructed by stones existing in the region

Slope (which determines the spacing indicated above): 5%

4.3 General information regarding the calculation of inputs and costs

Specify currency used for cost calculations:

• US Dollars

4.4 Establishment activities

	Activity	Type of measure	Timing
1.	Collecting stones and building barriers with gates	Structural	Before the rainy season
2.	Building channels	Structural	Before the rainy season

4.5 Costs and inputs needed for establishment

	Specify input	Unit	Quantity	Costs per Unit	Total costs per input	% of costs borne by land users
Labour	Collecting stones and building barriers with gates	persons/day/barrier	225.0	7.0	1575.0	100.0
Labour	Building channels	persons/day/barrier	7.0	7.0	49.0	100.0
Equipment	Animal traction	barrier	1.0	46.5	46.5	100.0
Equipment	Tools	barrier	1.0	46.5	46.5	100.0
Equipment	Animal traction for channel building	barrier	1.0	16.3	16.3	100.0
Total costs for establishment of the Technology					1733.3

Comments:

Duration of establishment phase: 3 month(s)

4.6 Maintenance/ recurrent activities

	Activity	Type of measure	Timing/ frequency
1.	Repair diversion construction and gates	Structural	annually after the rainy season
2.	Clean channels	Structural	annually after the rainy season

4.7 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	Repair diversion construction and gates	persons/day/unit	13.0	7.0	91.0	100.0
Labour	Clean channels	persons/day/unit	2.0	7.0	14.0	100.0
Total costs for maintenance of the Technology					105.0

Comments:

Machinery/ tools: big hammers, shovel, soil leveller

Costs were calculated according to the current situation, for the barrier with a gate length of 60 meters and a height of 2 meters, and for the channels with an average length of 50 meters and a width of 1 meter.
With regard to maintenance has been developed a lump sum annually where maintenance was done at the current time using modern equipment and as a result of no collapse charges barriers and accessories in most years has been estimated annual sum for the purpose of maintenance in the event of any damage

4.8 Most important factors affecting the costs

Describe the most determinate factors affecting the costs:

- Transportation and gradient
- difficult roads
- cutting stones

5.1 Climate

5.2 Topography

Comments and further specifications on topography:

Altitudinal zone: 2400 m a.s.l.

5.3 Soils

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 texture: Flood deposits

Topsoil organic matter: After falling vines leaves and grasses

Soil fertility is low - medium (output of the flood deposits)

Soil drainage / infiltration is medium - good

Soil water storage capacity is medium - high

5.4 Water availability and quality

Comments and further specifications on water quality and quantity:

Ground water table: 400 m

5.5 Biodiversity

5.6 Characteristics of land users applying the Technology

Indicate other relevant characteristics of the land users:

Land users applying the Technology are mainly common / average land users

Difference in the involvement of women and men: Women could not do the hard work, therefore, men work on the farm and women do the house works.

Population density: > 500 persons/km2

Annual population growth: 3% - 4%

70% of the land users are average wealthy and own 90% of the land (moderate income).
30% of the land users are poor and own 10% of the land.

5.7 Average area of land owned or leased by land users applying the Technology

5.8 Land ownership, land use rights, and water use rights

Land ownership:

• individual, titled

Land use rights:

• individual

Water use rights:

• communal (organized)

Comments:

There are three types of land ownership owned, Waqf, and a share at 70%, 20%, 10% respectively.

5.9 Access to services and infrastructure

6.1 On-site impacts the Technology has shown

Socio-economic impacts

Production

Water availability and quality

Income and costs

Socio-cultural impacts

Ecological impacts

Water cycle/ runoff

Soil

Biodiversity: vegetation, animals

Climate and disaster risk reduction

Other ecological impacts

6.2 Off-site impacts the Technology has shown

6.3 Exposure and sensitivity of the Technology to gradual climate change and climate-related extremes/ disasters (as perceived by land users)

Gradual climate change

Gradual climate change

	Season	Type of climatic change/ extreme	How does the Technology cope with it?
annual temperature		increase	well

Climate-related extremes (disasters)

Meteorological disasters

	How does the Technology cope with it?
local rainstorm	well

Hydrological disasters

	How does the Technology cope with it?
general (river) flood	not well

6.4 Cost-benefit analysis

How do the benefits compare with the establishment costs (from land users’ perspective)?

How do the benefits compare with the maintenance/ recurrent costs (from land users' perspective)?

6.5 Adoption of the Technology

• more than 50%

If available, quantify (no. of households and/ or area covered):

537 households covering 100 percent of the stated area

Of all those who have adopted the Technology, how many have did so spontaneously, i.e. without receiving any material incentives/ payments?

• 90-100%

Comments:

537 land user families have adopted the Technology without any external material support

There is a moderate trend towards spontaneous adoption of the Technology

Comments on adoption trend: The technology is applied in the whole region, but the lack of capital is an obstacle for continuing conservation operations

6.7 Strengths/ advantages/ opportunities of the Technology

Strengths/ advantages/ opportunities in the compiler’s or other key resource person’s view
Harvesting flood waters How can they be sustained / enhanced? Continue maintenance operations
Reduction of the runoff speed How can they be sustained / enhanced? Continue maintenance operations or introduce cement materials in the construction process to increase the ability to withstand various conditions
Distribution of water on a regular basis How can they be sustained / enhanced? Maintenance of channels to ensure sustainability

6.8 Weaknesses/ disadvantages/ risks of the Technology and ways of overcoming them

Weaknesses/ disadvantages/ risks in the compiler’s or other key resource person’s view	How can they be overcome?
buried sediment distribution channels	lining channels for easy cleaning process
Construction costs and labour requirements are high	use modern equipment in the construction and maintenance processes
you need time for implementation	Use of modern equipment
Severe floodings can demolish barriers and gates	Use of cement materials

7.2 References to available publications

Title, author, year, ISBN:

Report of traditional knowledge and customs (sallam, et al, 2008)General Census of Population, Housing and Establishment (Census, 2004). Guide of agricultural climate in Yemen (Al Khorasani, 2005).

Available from where? Costs?

Agricultural Research and Extension Authority, AREACentral Bureau of StatisticsAgricultural Research and Extension Authority, AREA