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Tajikistan

Geography and population

Tajikistan is a mountainous, landlocked country in the southeastern part of the Central Asia. It has a total area of 143 100 km2. It is bordered in the west and northwest by Uzbekistan, in the northeast by the Kyrgyz Republic, in the east by China and in the south by Afghanistan. It became independent in September 1991. Administratively, the country is divided into four provinces.

TABLE 1

Basic statistics and population

Physical areas:      
Area of the country

1994

14 310 000

ha
Cultivable area

1994

1 571 000

ha
Cultivated area

1994

769 900

ha

    - annual crops

1994

689 400

ha

    - permanent crops

1994

80 500

ha
Population:      
Total population

1996

5 935 000

inhab.
Population density

1996

41

inhab./km2
Rural population

1996

68

%
Economically active population      
engaged in agriculture

1996

37

%

    of which: - men

 

-

%

    - women

 

-

%
Water supply coverage:      
Urban population

1994

90

%
Rural population

1994

20

%

The different regions of the country are separated by high mountain ranges and are often isolated during the winter months. The north of the country covers part of the Fergana valley, which is a major agricultural area in the region. A few valleys in the central part of the country are situated between several mountain chains. Most of the country lies at over 3 000 m above sea level. In the east of the country are the Pamir mountains, which are part of the Himalayan mountain chain and are among the highest and most inaccessible mountains in the world. The highest mountain in the country, as well as in the whole of the FSU, the Peak of Communism with an altitude of 7 495 m, is situated in this region.

The cultivable area has been estimated at 1.57 million ha, which is about 11% of the total area of the country. In 1994, the total cultivated area was estimated at 769 900 ha, which is almost half of the cultivable area. About 689 400 ha consisted of annual crops and 80 500 ha of permanent crops, of which more than half were vineyards.

In 1994, there were 297 000 households in 262 kolkhoz (collective farms), occupying 48.4% of the cultivated area, and 199 700 households in 393 sovkhoz (state farms), occupying 44.3% of cultivated area. Private plots and land leased to state farm employees (about 33 000 households) totalled only about 7.3% of cultivated area (Figure 1).

The total population is 5.9 million (1996), of which 68% is rural. The average population density is about 41 inhabitants/km2. The southeast of the country has the lowest population density with fewer than 3 inhabitants/km2. The highest population density is in the southwest with 77 inhabitants/km2. Between 1990 and 1994, the average annual population growth rate was 1.9%, while during the 1980s it had been 3.3%. The main reasons for the decline have been emigration and lower birth rates resulting from deteriorating socio-economic conditions. In 1996, agriculture employed 37% of the economically active population. In 1992, agriculture contributed some 17% of GDP. The contribution of crop production to the gross agricultural production was about 64%, while animal husbandry contributed 36%. About 94% of crop production comes from irrigated lands.

See map of Tajikistan

TABLE 2

Water: sources and use

Renewable water resources:      
Average precipitation  

691 

mm/yr
   

98.88 

km3/yr
Internal renewable water resources  

66.30 

km3/yr
Total (actual) renewable water resources

1997

15.98 

km3/yr
Dependency ratio

1997

16.7

%
Total (actual) renewable water resources per inhabitant

1996

2 693

m3/yr
Total dam capacity

1994

28 970 

106 m3
Water withdrawal:      

    - agricultural

1994

10 961

106 m3/yr

    - domestic

1994

412 

106 m3/yr

    - industrial

1994

501 

106 m3/yr
Total water withdrawal  

11 874 

106 m3/yr

    per inhabitant

1994

2 074 

m3/yr

    as % of total (actual) renewable water resources

 

74.3

%
Other water withdrawal  

106 m3/yr
Wastewater - Non-conventional sources of water:      
Wastewater:      

    - produced wastewater

1994

0.577 

106 m3/yr

    - treated wastewater

 

106 m3/yr

    - re-used treated wastewater

 

106 m3/yr
Agricultural drainage water

1994

3 780

106 m3/yr
Desalinated water  

106 m3/yr

Climate and water resources

Climate

The climate of Tajikistan is classed as continental, but its mountainous terrain gives rise to wide variations. In those areas where cultivation takes place, which is mainly in the floodplains of the rivers, the climate consists of hot, dry summers and mild, warm winters. The average annual precipitation is 691 mm, ranging from less that 100 mm in the southeast up to 2 400 mm on the Fedchenko glacier in the central part of the country. Precipitation occurs during the winter season, mainly between September and April. The average temperature is about 16-17C. The absolute maximum temperature recorded is 48C in July, the absolute minimum temperature -49C in January. The daily temperature range is about 7C in winter and 18C in summer.

River basins and water resources

Tajikistan can be divided into four major river basins:

TABLE 3

Irrigation and drainage

Irrigation potential

1994

755 200 

ha
Irrigation:      
1. Full or partial control irrigation: equipped area

1994

719 200

ha

    - surface irrigation

1994

719 200

ha

    - sprinkler irrigation

1994

ha

    - micro-irrigation

1994

ha

    % of area irrigated from groundwater

1994

9.5

%

    % of area irrigated from surface water

1994

87.0

%

    % of area irrigated from non-conventional sources

1994

3.5

%
% of equipped area actually irrigated  

100 

%
2. Equipped wetland and inland valley bottoms (i.v.b.)  

ha
3. Spate irrigation  

ha
Total irrigation (1+2+3)

1994

719 200 

ha
- as % of cultivated area  

93.4

%
- increase over last 10 years

1985-94

10 

%
- power irrigated area as % of irrigated area

1994

44.2

%
Full or partial control irrigation schemes: Criteria      
Large-scale schemes > 5 000 ha

1994

670 000 

ha
Medium-scale schemes

1994

ha
Small-scale schemes < 5 000 ha

1994

49 200

ha
Total number of households in irrigation  

 
Irrigated crops:      
Total irrigated grain production

1994

192 100 

t

    as % of total grain production

1994

84.5

%
Harvested crops under irrigation

1994

719 200 

ha

    - permanent crops: total

1994

80 500 

ha

    - annual crops: total

1994

638 700 

ha

    . cotton

1994

282 740 

ha

    . fodder crops

1994

117 300 

ha

    . cereals

1994

145 570 

ha

    . vegetables

1994

23 060 

ha

    . other annual crops

1994

70 030 

ha
Drainage - Environment:      
Drained area

1994

328 600 

ha

    - drained area in full or partial control irrigated areas

1994

328 600 

ha

    - drained area in equipped wetland and i.v.b.

 

ha

    - other drained area

 

ha
- area with subsurface drains

1994

137 600 

ha
- area with surface drains

1994

191 000 

ha
Drained area as % of cultivated area  

42.7

%
Power drained area as % of total drained area

1990

30.5

%
Area salinized by irrigation

1994

115 000 

ha
Population affected by water-borne diseases  

inhabitants

- The Syr Darya basin. The northwest of the country forms part of the Syr Darya basin. About 78% of the flow of the Syr Darya River is generated on the territory of the Kyrgyz Republic. Only 1% of the total flow of the Syr Darya River is generated within Tajikistan by the shallow rivers Khodzhabakirgan, Aksu, Isfara and Isfana, with a total flow of 0.4 km3/year.

- The Amu Darya basin. About 82.5% of the flow of the Amu Darya River is generated on the territory of Tajikistan by the Vakhsh, Pyandzh and Kafirnigan rivers. The Vakhsh River is the largest river in Tajikistan, crossing it from the northeast to the southwest. It rises in the Kyrgyz Republic, where it is called the Kyzyl Suu, and its catchment area lies in the highest part of Tajikistan at over 3 500 m. The Pyandzh River forms the border between Tajikistan and Afghanistan for almost its entire length. After the confluence with the Vakhsh River, it becomes the Amu Darya River and about 100 km further downstream it leaves Tajikistan to become the border between Afghanistan and Uzbekistan. The Kafirnigan River is another large tributary of the Amu Darya River. It rises in Tajikistan and flows into the Amu Darya River about 36 km downstream of the confluence of the Pyandzh and Vakhsh rivers.

- The Zeravshan basin. The Zeravshan River, rising in Tajikistan, was once the largest tributary of the Amu Darya River. At present its flow is almost fully used, mainly for irrigation.

- The basin draining to China. In the extreme northeast of the country, a small area drains towards China. No figures on flows are available.

Renewable Surface Water Resources (RSWR) by river basin

River

Part of total

Internal

Inflow secured

Outflow

Actual

basin

area of country

RSWR

by treaties

to be reserved

RSWR

 

(%)

(km3/year)

(km3/year)

from:

(km3/year)

to:

(km3/year)

Syr Darya

11 

0.40

11.80

Uzbekistan

11.54

Uzbekistan

0.66

Amu Darya

84 

58.03

1.51

Kyrgyz Rep.

49.00

Uzbekistan

10.54

Zeravshan

4.87

 

3.09

Uzbekistan

1.78

Northeast

 

China

Total

100 

63.30

13.31

 

63.63

 

12.98

The total IRSWR of Tajikistan are estimated at 63.3 km3/year (Figure 2). During the Soviet period, the sharing of water resources among the five Central Asia republics was on the basis of master plans for the water resources development in the Amu Darya and Syr Darya river basins. With the establishment of the Interstate Commission for Water Coordination in 1992, the newly independent states decided to prepare a regional water strategy (Agreement of 18 February 1992), but to continue to respect the existing principles until the adoption of a new water sharing agreement to be proposed by this new water strategy. The surface water resources allocated to Tajikistan are thus calculated every year, depending on the existing flows. However, on average, it can be considered that the surface water resources available for Tajikistan are 12.98 km3/year.

The internally generated renewable groundwater resources are estimated at 6 km3/year, of which 3 km3/year overlap with surface water resources. The part of groundwater resources for which abstraction equipment exists has been estimated at 2.2 km3/year.

The ARWR of Tajikistan can thus be estimated at 15.98 km3/year.

Non-conventional sources of water

In 1994, the return flow within Tajikistan amounted to 4.36 km3/year, including 3.78 km3/year of collector-drainage flow from irrigation and about 0.58 km3/year of domestic and industrial wastewater. The main part of the return flow, about 3.94 km3/year, flows back to rivers, of which 2.85 km3 into the Amu Darya River and 1.09 km3 into the Syr Darya River. More than 0.35 km3/year (8% of total return water) are re-used for irrigation. The remaining 0.06 km3/year of return flow are directed to natural depressions.

Lakes and dams

There are 1 300 natural lakes in Tajikistan with a total water surface area of 705 km2 and a total capacity of about 50 km3. About 78% of the lakes are situated in the mountain zone above 3 500 m above sea level. The largest lake in the country is Lake Karakul in the northeast at an altitude of 3 914 m, with a surface area of 380 km2 and a capacity of 26.5 km3.

In 1994, there were 19 dams in Tajikistan: 5 in the Syr Darya River basin and 14 in the Amu Darya River basin (7 on the Vakhsh River, 4 on the Pyandzh River and 3 on the Kafirnigan River). Their total reservoir capacity is about 29 km3 and the reservoir area 934 km2. There are nine large reservoirs (capacity more than 500 million m3 each) with a total capacity of 25.34 km3 and an area of 690 km2. The largest reservoirs are: the Nurek on the Vakhsh River (10.5 km3), the Kayrakkum on the Syr Darya River (4.16 km3), and the Lower Kafirnigan on the Kafirnigan River (0.9 km3). The Nurek headwork incorporates a unique rock-fill dam with a central core, 310 m in height, a power plant with a capacity of 2 700 MW and a reservoir with a capacity of 10.5 km3. The Rogun reservoir on the Vakhsh River (8.6 km3) has been planned, but not yet constructed. The main purposes of the reservoirs are hydropower production and irrigation.

The gross theoretically hydropower potential of Tajikistan is estimated at 527 000 Gwh/ year, about half of which would be economically feasible. In 1994, the total installed capacity was about 4 GWh, generating about 98% of the country's electricity. Tajikistan ranks third in the world for hydropower development, after the United States and the Russian Federation.

Water withdrawal and wastewater

In 1994, the total annual water withdrawal was estimated at 11.87 km3, of which over 92% for irrigation purposes (Figure 3). About 2.26 km3 was groundwater, an esti-mated 0.35 km3 re-used collector-drainage water and wastewater for irrigation, and the remainder was surface water (Figure 4). In 1995, the total water demand for all sectors was estimated at 12.955 km3.

Irrigation and drainage development

Irrigation development

Irrigation in Tajikistan is important for the development of agriculture and the national economy. In 1960, the total area equipped for irrigation was estimated at about 408 000 ha. In 1994 it was 719 200 ha, which was 93.4% of the total cultivated area (Figure 5). About 33% of the total irrigated area (240 200 ha) is situated in the Syr Darya River basin and 67% (479 000 ha) in the Amu Darya River basin, of which 20 000 ha in the Zeravshan basin, 49 000 ha in the Kafirnigan basin, 18 000 ha in the Pyandzh basin and 392 000 ha in the Vakhsh basin. Considering that a further 36 000 ha are potentially suitable for irrigation development up to 2010, the total potential for irrigation development has been estimated at 755 200 ha.

In northern Tajikistan, irrigation is mainly based on the water resources of the Syr Darya River, whose water is delivered by pumping stations. The Tajik part of the Hunger steppe is bordered in the northwest by Uzbekistan. This region belongs to a semi-desert zone and the irrigated area is about 39 000 ha, mainly used for cotton. Water is taken from the diversion canal of the Farkhad power plant in two stages by remote-controlled pumping stations, which lift the water to an elevation of 170 m. In 1994, the total power irrigated area was estimated at 318 000 ha.

Large-scale irrigation development in southern Tajikistan started in 1931 with the construction of the Vakhsh main canal in the Vakhsh valley. This canal is 11.7 km long with a capacity of 150 m3/s, diverting water from the Vakhsh River for the irrigation of 120 000 ha. The Vakhsh main canal was later reconstructed, its capacity increased to 200 m3/s and the canal extended to irrigate also the Akgazin plateau.

During the Soviet period, important irrigation development took place in the Kafirnigan River basin, located in southern Tajikistan. Together with Uzbekistan, Tajikistan built the Large Gissar canal in 1940, which carries water from the Dushanbe River into the basin of the Surkhandarya River (situated in Uzbekistan). The irrigated area in this part of Tajikistan is about 29 000 ha.

Further irrigation development in southern Tajikistan took place with the construction of the Nurek and Baipaza dams on the Vakhsh River. Water is provided for the irrigation of 76 000 ha in the Dangarin area. In the Vakhsh basin, a large irrigation system (40 000 ha) is located in the Yavan and Obikiik valleys, which are extremely short of water. At present, the valleys are supplied with water from the Baipaza reservoir through a tunnel 7.3 km long.

Surface irrigation is the only irrigation technique used in Tajikistan. In 1994, furrow irrigation was practised on over 96% of the area equipped and borderstrip irrigation on about 2%. On the hill slopes the delivery net-work for the irrigation of gardens and grapes consists of pipes, but the irrigation technique used on the field is also surface irrigation (Figure 6). Micro-irrigation was developed on an experimental basis on 110 ha in 1990, but at present is no longer used.

All irrigation is full control irrigation. About 68 000 ha are irrigated from groundwater and about 25 000 ha from re-used drainage water and wastewater (Figure 7). To some 250 000 ha, or 34.8% of total area equipped for irrigation, water is provided through pumping in rivers, while elsewhere the water is gravity fed from river diversion or reservoirs.

In 1994, the total length of the irrigation canal network was about 33 250 km. The length of the main canals and the inter-farm network was 27 991 km, of which 38% consisted of concrete canals. The on-farm canal network totalled 5 259 km, with 13.3% concrete canals, 21.9% pipes and the remaining 64.8% unlined earthen canals (Figure 8). In 1994, the irrigation efficiency, considering losses between the source and the irrigated field, was estimated at 72%.

Large-scale schemes, with an area of more than 5 000 ha, cover 670 000 ha, while small-scale schemes, with an area of less than 5 000 ha, cover the remaining 49 200 ha (Figure 9). No private irrigation systems exist in Tajikistan.

The major irrigated crops are cotton, fodder, fruits and grapes, cereals and vegetables (Figure 10). Cotton, fruits and grapes are the most important export crops. In 1994, irrigated crop yields were 1.91 t/ha for cotton, 0.85 t/ha for wheat, 1.71 t/ha for rice and 3.01 t/ha for grapes.

The costs of irrigation development and rehabilitation are higher in Tajikistan than in downstream countries, mainly because of the need for pumping and erosion control. The average cost of irrigation development is estimated at $US 10 000-18 000/ha for large-scale surface irrigation schemes using standard modern technologies, including agricultural development. If micro-irrigation were to be developed on the existing irrigated lands, its estimated implementation cost would be $US 2 300-3 500/ha. Annual O&M costs which would enable full cost recovery are estimated at about $US 550/ha for gravity surface irrigation systems, $US 600/ha for micro-irrigation and $US 750/ha for pump systems. However, in recent years the actual operational cost has not exceeded $US 120-136/ha.

Waterlogging, salinity and drainage development

Out of the total irrigated area of 719 200 ha, over 600 000 ha require drainage. However, in 1994, drainage systems had been constructed on only 328 600 ha. Approximately 58% is surface drainage, and 42% is subsurface drainage (Figure 11). The average cost of surface drainage development is estimated at $US 500-600/ha, and that of subsurface drainage development at $US 1 400/ha. The total length of the existing drainage network is about 11 500 km.

The two major land quality problems in the country are the interrelated issues of salinity and waterlogging, caused by high ground-water levels. In 1994, about 115 000 ha, or 16% of the irrigated land, were classed as saline by Central Asian standards (toxic ions exceed 0.5% of total soil weight).

Institutional environment

The Ministry of Water Resources (MWR) is in charge of water resources research, planning, development and distribution. It also undertakes the construction, operation and maintenance of the irrigation and drainage networks at inter-farm level. Water distribution is based on a strict limitation of water withdrawal. Water allocations are regularly reduced to promote water savings and to satisfy the demand from new users. Institutionally, water management follows a hierarchy: state, province, district, farm (or WUA). The first three levels come under the MWR and are responsible for water distribution and delivery to the farm inlet, for assistance to the water users in implementing advanced technology, and for the control of water use and water quality. The special reclamation services at provincial level are the responsibility of the MWR. They monitor the irrigated lands (groundwater level, drainage discharge, soil salinity) and plan measures for the maintenance and improvement of soil conditions, including leaching, repair and cleaning of collectors and drainage network, and rehabilitation.

The Ministry of Agriculture is in charge of agricultural research and extension, agricultural and land reclamation development at farm level, and operation and maintenance of the irrigation network at farm level.

The state enterprise `Tajikjilkomkhoz' is responsible for domestic water supply and the treatment of wastewater. The Ministry of the Environment is responsible for the protection of water resources.

The water law and water rights are defined by the special `Water Code of Tajikistan', which was confirmed on 12 December 1993.

Tajikistan is a member of IFAS and ICWC. Within Tajikistan are the Leninabad board of the Syr Darya BWO and the Kurgan Tube board of the Amu Darya BWO.

Trends in water resources management

Tajikistan has developed two alternative scenarios in its national water strategy, the main objective of which is water conservation.

Under the first scenario, the irrigated area in 2000 will be the same as in 1994, 719 200 ha, while in 2010 it will be 743 000 ha. The main goal during the next 15 years will be the rehabilitation of the existing irrigated land and a reduction in irrigation water demand from 11.23 km3/year in 1995 to 9.81 km3/year in 2010. The irrigated area per caput is expected to fall from 0.12 ha to 0.08 ha, which will not be able to satisfy the growing demand for food. In the other sectors, water consumption is expected to increase: municipal demand from 0.48 km3 in 1995 to 0.60 km3 in 2010, industrial water demand from 0.5 km3 to 1.5 km3. The total water withdrawal is assumed to remain more or less stable, or even to decrease slightly during the next 15 years.

Under the second scenario, the irrigated area will be 755 200 ha in 2010, while water withdrawal will fall from 11.23 km3/year at present to 10.38 km3/year in 2010. The total water withdrawal is assumed to increase by about 0.7-0.8 km3/year.

The environmental problems in Tajikistan are the result of its climate and natural conditions (steep slopes) and the structure of the national economy. The irrigated area is subject to substantial erosion, land slides, sagging and deformation. The area affected is estimated to be about 45 000 ha. Irrigation development in the foothill zone, especially in the more stony areas, induces increasing groundwater recharge, intensifying waterlogging and salinization of the lower areas, and increasing the sediment loaded drainage water runoff. Collector-drainage water is the principal water polluter (common mineralization, pesticides and some other waste ingredients). Environmental pollution is also increasing as a consequence of industrial production.

Main sources of information

Ministry of Water Resources. Annual reports on land reclamation and water use, years 1980-1994 (in Russian). Dushanbe. 200 p.

SPA `TajikNIIGiM'. 1996. Suggestions for national water management strategy of the Republic of Tajikistan (in Russian). Ministry of Water Resources, Dushanbe. Second edition. 80 p.

State Agency on Statistics. 1994. Economy of the Republic of Tajikistan in 1993 (in Russian). Dushanbe. 288p.

Tahirov, I.G., Kupayi, G.D. 1994. Water resources of the Republic of Tajikistan (in Russian). Dushanbe. Vol. 1: 181 p., Vol. 2: 119 p.

World Bank. 1994. Tajikistan: a World Bank country study. Washington, D.C. 240 p.

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