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

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

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

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

2.1 Short description of the Technology

Definition of the Technology:

Spiral water pumps can carry water from the river to fields that are up to 30 metres higher than the river without the input of electricity or fuel.

2.2 Detailed description of the Technology

Description:

A Spiral tube water pump is a method of pumping water by using an undershot water wheel which has a scoop connected to a spiral tube. As the wheel turns, the scoop will alternatively introduce either water or air into the spiral tube. The pressure from the hydrostatic head generated from the column of water introduced by the scoop, is added to the pressure from previous scoops, and so as the wheel turns it will increase the water pressure with every turn of the spiral. The main characteristic of the spiral water pump is that it can pump water without the input of electricity or fuel. It works with the power of the water flow. Once built, the spiral water pump is able to push water up to 30 metres high (horizontal push) and up to 70 metres away (vertical push). The water push (how far water will be pushed horizontally and vertically) depends on how big the wheel of the Spiral Water Pump is built, and how much tube is put around the wheel.

Purpose of the Technology: The spiral tube water pumps were installed with the aim to provide irrigation water from rivers to higher level crop fields. Land users in GBAO are dependent on irrigation water to grow their crops and without the use of water pumps they can not access the water from rivers that are at a lower level than the fields.

Establishment / maintenance activities and inputs: The type, size and thus material costs of a spiral water pump will depend on 2 parameters: first, the irrigation needs (how far the water needs to go and how much is used per day) and second, the available water flow (the velocity and depth of the water source). There is only an initial investment in material for the water wheel, after that the pump should work without any further costs incurred.

Natural / human environment: The spiral water pumps were installed in 4 different districts of the semi-arid to arid GBAO region where the availability of irrigation water is crucial to crop production. So far, 4 spiral water pumps have been installed for test runs but it is very likely that they will be adopted by other farmers as they observe the benefits created by the ones that are already in place.

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:

Tajikistan

Region/ State/ Province:

GBAO

Further specification of location:

Roshtkalah, Ishkashim, Vanj, Rushnan

Specify the spread of the Technology:

• evenly spread over an area

If precise area is not known, indicate approximate area covered:

• 100-1,000 km2

Comments:

1 spiral water pump was installed in each of these 4 districts

Map

×

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.):

The first water wheels were established in 2011 by MSDSP

3.1 Main purpose(s) of the Technology

• access to irrigation

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

Cropland

• Annual cropping
• Tree and shrub cropping

Annual cropping - Specify crops:

• cereals - wheat (spring)
• root/tuber crops - potatoes

• tomatoes, radishes, coleslaw

Tree and shrub cropping - Specify crops:

• stone fruits (peach, apricot, cherry, plum, etc)
• tree nuts (brazil nuts, pistachio, walnuts, almonds, etc.)

Number of growing seasons per year:

• 1

Specify:

Longest growing period in days: 170

Comments:

Major land use problems (compiler’s opinion): There has been less snow cover during winter time, and less precipitation in the spring, resulting in a lack of irrigation water, and a decline of soil fertility.

3.4 Water supply

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

• full irrigation

3.5 SLM group to which the Technology belongs

• irrigation management (incl. water supply, drainage)
• energy efficiency technologies

3.6 SLM measures comprising the Technology

structural measures

• S11: Others

Comments:

Main measures: structural measures

3.7 Main types of land degradation addressed by the Technology

soil erosion by water

• Wt: loss of topsoil/ surface erosion

soil erosion by wind

• Et: loss of topsoil

chemical soil deterioration

• Cn: fertility decline and reduced organic matter content (not caused by erosion)

physical soil deterioration

• Pk: slaking and crusting
• Pi: soil sealing

biological degradation

• Bc: reduction of vegetation cover
• Bq: quantity/ biomass decline

Comments:

Main type of degradation addressed: Wt: loss of topsoil / surface erosion, Et: loss of topsoil, Cn: fertility decline and reduced organic matter content

Secondary types of degradation addressed: Pk: sealing and crusting, Bc: reduction of vegetation cover, Bq: quantity / biomass decline

Main causes of degradation: change of seasonal rainfall (less precipitation and snow cover), droughts

3.8 Prevention, reduction, or restoration of land degradation

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

• prevent land degradation

4.1 Technical drawing of the Technology

4.2 General information regarding the calculation of inputs and costs

other/ national currency (specify):

Somoni

If relevant, indicate exchange rate from USD to local currency (e.g. 1 USD = 79.9 Brazilian Real): 1 USD =:

4.5

4.3 Establishment activities

4.4 Costs and inputs needed for establishment

If land user bore less than 100% of costs, indicate who covered the remaining costs:

MSDSP

Comments:

Duration of establishment phase: 3 month(s)

4.5 Maintenance/ recurrent activities

4.6 Costs and inputs needed for maintenance/ recurrent activities (per year)

Comments:

The costs apply to the construction of 1 spiral pump.

4.7 Most important factors affecting the costs

Describe the most determinate factors affecting the costs:

The material needed to build such a spiral waterpump is the most important factor determining the costs.

5.1 Climate

5.2 Topography

Comments and further specifications on topography:

Altitudinal zone: Also 1,001-1,500 m a.s.l.

Landforms: Rivers

Slopes on average: Rivers need to have some flow

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 fertility is low

Soil drainage / infiltration is medium

Soil water storage capacity is medium

5.4 Water availability and quality

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

Population density: 10-50 persons/km2

Annual population growth: 1% - 2%

5.7 Average area of land used by land users applying the Technology

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

Land ownership:

• state
• individual, titled

Land use rights:

• communal (organized)

5.9 Access to services and infrastructure

6.1 On-site impacts the Technology has shown

Socio-economic impacts

Production

Water availability and quality

Socio-cultural impacts

Ecological impacts

Water cycle/ runoff

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

Climate-related extremes (disasters)

Meteorological disasters

Climatological disasters

Hydrological disasters

Other climate-related consequences

Other climate-related consequences

Comments:

Of course the technology only works if there is a water flow available, therefore a decrease in seasonal rainfall could negatively impact the performance of the spiral water pumps.

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)?

Comments:

the spiral pumps were only installed in 2011, therefore long-term returns can not be assessed yet

6.5 Adoption of the Technology

• single cases/ experimental

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

4 households

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

• 0-10%

Comments:

100% of land user families have adopted the Technology with external material support

Comments on acceptance with external material support: It was the Social Unit Development Village Organisations (SUDVO) who received the spiral water pumps from MSDSP

There is no trend towards spontaneous adoption of the Technology

Comments on adoption trend: not yet determined, as the technology has been installed only recently

6.7 Strengths/ advantages/ opportunities of the Technology

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

7.1 Methods/ sources of information

7.2 References to available publications

Title, author, year, ISBN:

Shariff, Jamil et. al. Spiral water pumps. An efficient, cheap and effective solution for up-land irrigation along canals, streams and rivers. CSIT 2011.

Available from where? Costs?

jamil.shariff@akdn.org, artur.khudonazarov@yahoo.com,