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Obsolesce Of Equipment Spares
Due to vast changes in technology, manufacturers are
unable to provide exact spares. This leads to purchase
of new entire equipment .Rehabilitation of Tedzani I&
II was partly necessitated by this challenge as well
as installation of Tedzani III new digital governors.
Siltation
Environmental degradation on the Shire River and its
tributaries upstream of Tedzani Intake has led to accumulation
of silt at Tedzani Intake Pond. Hired dredgers are used
to remove the silt but a permanent solution is required.
Weeds / Trash
Weeds from Liwonde and those washed away by rain water
upstream of Tedzani Intake cause a lot of blockage on
Intakes fine screens. Energy generation is thus affected
greatly particularly during rainy season. Trash rakes
are used to rake off trash from the screens but when
the weeds are in excess, the machines are shut down
to flash off the weeds through Intakes Radial gates.
Encroachment & Deforestation
The need to open up farming land and production of charcoal
by people and animals from surrounding villages has
caused destruction of vegetation on the Shire river
banks. This has caused a great deal of erosion resulting
into accumulation of silt and trash on the Intake Reservoir
This affects generation of electricity since the capacity
of the reservoir diminishes by silt accumulation and
also trash blocks fine screens disabling normal flow
of water.
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