Challenges

GTZ-ECO –Access to Modern Energy –Electricity(AMES-E/ HYDRO

In the endeavor to provide access to

electrical energy to the rural dwellers

in Ethiopia,

GTZ-ECO,AMES-E/HYDRO intends

to contribute to the development of

the hydropower sector in the country

by developing pilot sites to generate

electricity for lighting and other

productive uses in the different

regions of the country.

Some common challenges and

remedial action taken is listed below.

Background

Land Sliding

During laying of the penstock in Ererte

MHP, we encounter a hard basaltic rock

that can not easily excavate. Then using

the community participation, some

experienced labours, and using the locally

available materials such as burning an old

car tyre an 11 m and a depth of 37 cm

basaltic rock is excavated

In Hagra-Sodicha the washed away of the

left bank of the canal was happed due to

not installing the intake gate on time. The

last 30m of the canal was not excavated at

the time when the river water is coming

through the intake gate. The water couldn’t

get a way to flow towards the downstream

direction. Then it breaches the left bank of

the canal. The remedial action taken is

backfilling (520 cubic meter) of soil and

plantation.

The Erete MHP canal around the intake

is situated near to the river. During the

rainy season, the water is coming under

the canal foundation and it creates piping.

The main reason for this case is due

shallow foundation of canal . The action

taken is to providing retaining wall that

increases seepage length.

In the Hagra –Sodicha MHP the forbay

area is situated in the hilly area. It needs

an excavation of 750 cubic meter to get

the required forbay and canal elevation.

In this site the community participation is

remarkable.

Due to rolling stone from up hill 3.92 cubic

meter of masonry retaining wall is broken

down.

Theis retaining wall protects the power

house from hitting by the rolling stone.

Hydro Power Workshop (WS) of the Sector Network Energy Sub-Sahara Africa and EnDev

Deep Excavation

Stone Breaking

Piping

Retaining wall