Ministry of land reclamation and water
resources, Republic of Tajikistan
SUE «Tochikobloikhakashi»
Safety of hydraulic engineering
installations under global climate
change conditions
Pilot Program for Climate Resilience - Tajikistan
Director - Akbar Ozorovich Nabiev
Dushanbe, 6-7 March 2012
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Ladies and gentlemen,
This presentation will give you a brief description of the
possible consequences of the effects of climate change on
the condition of various hydraulic engineering installations
in the Republic of Tajikistan and their reliability and safety
in operation, as well as the practical steps being taken to
ensure their soundness, maintenance and operation at
present and in the long term.
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Types, numbers and extent of the principal HEI
The following assets appear in the books of the RT
Ministry of land reclamation and water resources:
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Hydraulic engineering installations– 7427;
Pumping stations – 483;
Drainage systems – 2400 km;
Waste disposal systems– 450 km;
Open irrigation systems– 8174 km;
Piped irrigation systems – 1000 km;
Irrigation tunnels – 26.6 km;
Irrigation boreholes – 3040.
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Condition of HEI
 Commissioned mainly in the 1940s;
 Having exceeded their standard working life in most cases;
 Substantial levels of wear (over 60% on average) and
obsolescence;
 An increasing number of cases of failure and breakdown,
impairing their efficiency;
 Most of the HEI are due for complete rehabilitation with
appropriate modernisation.
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Principal factors affecting the safety of
hydraulic engineering installations
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Wear and ageing, reduced mechanical properties;
Lack of skilled specialists;
Lack or low level of servicing and maintenance;
Insufficient preventive and repair and rehabilitation work;
A low level of targeted funding for their preservation or
rehabilitation employing innovative technologies and safe
management;
 Individual faults in design, construction, operation and
management;
 Lack of republic and regional scientific and industrial bodies for
monitoring and forecasting natural disasters and changes in
natural and climatic conditions, including the developing process
of global warming.
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Principal causes of HEI failure
due to increased flow
 Inability of HEI to let through above-normal water
flows;
 Failures in emergency releases at HEI;
 Lack of work to ensure normal sedimentation
conditions in reservoirs, including emergency
removal of sediment prior to flooding;
 Silting-up of irrigation channels and drainage
systems;
 The critical condition of levees and faults in their
design.
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Priority measures for maintaining the efficiency of existing
HEI having regard to climate change under present
conditions and in the longer term
 Systematic monitoring of the condition of hydraulic
engineering installations;
 Assessment of operating efficiency and quantitative
determination of basic reliability parameters;
 Identification of the most vulnerable HEI units and
installations requiring repair or rebuilding;
 Full and high-grade maintenance and restoration work
on HEI;
 Instruction of operating personnel and training of skilled
specialists in the management and running of HEI;
 Regular inspection and care.
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Conditions ensuring HEI safety
taking account of climate change
 Forecasting of seasonal floods, mud flows, rainstorms and other
natural catastrophes, including those due to climate change;
 Planning sufficient throughput capacity for HEI and choosing
optimum routines for drawdown during major floods and spates,
ensuring the necessary level of hydrological security;
 Taking account during planning of all reliability and climatic effect
factors;
 Complying with technical and technological parameters in
construction;
 Complying with design and technological parameters in HEI
operation;
 Improving the quality of the management system for existing HEI
taking climate change into account.
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Thank you for your attention.
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