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A platform for research: civil engineering, architecture and urbanism
Sedimentation in New Zealand Hydroelectric Schemes
Geologically young New Zealand catchments can produce large quantities of relatively coarse sediment which has caused problems in the design and operation of some hydroelectric schemes.
The general sediment producing characteristics of New Zealand catchments are described and are related to the measured sedimentation rates of four reservoirs.
A number of examples of sediment management problems and methods of dealing with them are given to illustrate some of the principles and practice in the design and operation of sediment handling facilities.
Generally sedimentation in New Zealand hydroelectric reservoirs has not been a problem mainly because development has concentrated on rivers where a large proportion of the sediment has been trapped by natural lakes upstream. Usually catchments of major schemes have had less than 200 t/km2 sediment yield annually and this has caused no problems. However some smaller schemes in catchments where the annual sediment yield has exceeded 2000 t/km2 have encountered problems and the cost of dealing with this has usually been less than 5% of the scheme income.
It is concluded that planning and management of sediment in New Zealand is a long-term problem which can be handled using the existing database and engineering techniques providing the problem is recognised.
Sedimentation in New Zealand Hydroelectric Schemes
Geologically young New Zealand catchments can produce large quantities of relatively coarse sediment which has caused problems in the design and operation of some hydroelectric schemes.
The general sediment producing characteristics of New Zealand catchments are described and are related to the measured sedimentation rates of four reservoirs.
A number of examples of sediment management problems and methods of dealing with them are given to illustrate some of the principles and practice in the design and operation of sediment handling facilities.
Generally sedimentation in New Zealand hydroelectric reservoirs has not been a problem mainly because development has concentrated on rivers where a large proportion of the sediment has been trapped by natural lakes upstream. Usually catchments of major schemes have had less than 200 t/km2 sediment yield annually and this has caused no problems. However some smaller schemes in catchments where the annual sediment yield has exceeded 2000 t/km2 have encountered problems and the cost of dealing with this has usually been less than 5% of the scheme income.
It is concluded that planning and management of sediment in New Zealand is a long-term problem which can be handled using the existing database and engineering techniques providing the problem is recognised.
Sedimentation in New Zealand Hydroelectric Schemes
Jowett, Ian (author)
Water International ; 9 ; 172-176
1984-01-01
5 pages
Article (Journal)
Electronic Resource
Unknown
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