Сравнение практик

• Use of water resources
• Use of land resources
• Environmental protection

• Use of water resources
• Use of land resources

Страна: Туркменистан

Область: Дашогузская

Страна: Казахстан

Область: Южно-Казахстанская

Район: Мактааральский

Lower reaches of the Amu Darya River Basin

• Upstream (Ferghana) and midstream (Syr Darya) of the Syr Darya River
• Ebb occurrence of highly mineralized ground water

Дата начала: 01.01.2009

Дата окончания: 31.12.2015

Дата начала: 01.01.1965

Дата окончания: 31.12.1975

Expanding salination of irrigated land

Deterioration of reclamation situation: rising of ground water, land salination

Set of measures to enhance the reclamation condition of land (motorized cleaning of the collector, reconstruction of hydro-technical facilities, etc.).

Technique and technology of land reclamation via a system of vertical drainage wells (VDW)

Actions:

A set of measures to rehabilitate the Darialyk Collector executed to improve land reclamation condition.

Results:

The executed actions allowed lowering the level of ground water occurrence, thus, enhancing the overall land reclamation condition in target area as well as improving water drainage in adjacent areas.

Actions:

A VDW system set up. Prior to its installation, the area was drained via a horizontal open-type drain-age network ineffective as to reducing the mass of salinized land.

Comprehensive VDW efforts significantly enhanced drainage.

However, currently due to the absence of a single organization responsible for VDW operation, maintenance and repair, the VDW systems recon-structed under World Bank and Asian Development Bank projects do not perform as effectively as ini-tially.

Results:

Financial and economic:
Increased cotton yields (from 10-15 up to 30-35 dt/ha).

Technical:
Successful response to land salination in 3 districts: ground water table steadily kept at 2-3 m depth leading to a sharp contraction of salinized land area.

Lessons learnt:

Lowered ground water level and improved reclamation status of irrigated land allowed tenant farmers and daikhan (farmer) associations in Dashoguz Velayat (Region) to increase crop productivity and, thus, gain additional income.

Recommendations:

Major project efforts to enhance the overall land condition in the target area resulted in improved public welfare.  The practice can benefit from the relevant Uzbekistan’s experience (systemic cleaning of collectors) – cleaning of intra-farm water supply networks simultaneously with inter-farm and/or main collector systems.  Uzbekistan’s model demonstrated sharp improvement of reclamation condition of entire land massifs.  Ecosystems are extremely vulnerable and without proper care future generations will have to take much more effort and spend more resources to restore them.

Lessons learnt:

In due time, the model proved useful and timely, as the country urgently needed to increase its cotton yields. The practice demonstrated high efficiency of VDW in combatting land salination.

Recommendations:

1. Establish a special VDW System Maintenance and Operation Department;
2. Build personnel capacity:
• Continual training of personnel in the Department and Provincial Hydrogeological and Land Reclamation Expedition;
• Drafting and distribution of training materi-als.

Domestic tools (outcomes of research by domestic R&D organizations)

Domestic tools (outcomes of research by domestic R&D organizations)

1. Затраты на внедрение: Высокие

2. Примерная стоимость капиталовложений на 1 га:

3. Затраты на поддержание и эксплуатацию: Высокие

4. Экспертная поддержка: Не требуется

1. Затраты на внедрение: Умеренные

2. Примерная стоимость капиталовложений на 1 га:

3. Затраты на поддержание и эксплуатацию: Высокие

4. Экспертная поддержка: Не требуется

Project title: Reconstruction of the Darialyk Interstate Collector (including water inlets).

Project duration: 2009-2016.

Project goal and objectives: improving passage of drainage water.

Project beneficiaries: water consumers of all levels in the area supplied by the Darialyk Collector.

Project implementer: Republic of Turkmenistan

ASBP-3 Project

Reshetkina N.M. et al. “Vertical Drainage”, Moscow: Kolos, 1978. – 319 p.

SIC ICWC

SIC ICWC