ICOLD releases four new technical bulletins on dams

ICOLD technical bulletins

The International Commission on Large Dams has released four new technical bulletins related to various aspects of dams.

Bulletin 146, Dams and Resettlement – Lessons Learnt and Recommendations, is intended to be an information source for policy makers and implementers. It highlights the latest policies, criteria and resettlement measures adopted, their implementation aspects and the performance or effectiveness of the mitigation measures taken to improve the living standards and quality of life of the relocation. The bulletin deals with issues implied by resettlement, explains case histories and lessons learned, and recommends strategies.

Bulletin 148, Selecting Seismic Parameters for Large Dams – Guidelines, is a revision of previous Bulletin 72, with the same name and published in 1989. This bulletin takes into account current practice in a number of countries, with a view toward providing a guide for the selection of parameters to be used in the seismic design, analysis and safety evaluation of new or existing dams and their appurtenant structures, as well as promote consistency in handling the earthquake aspects of dam performance evaluation among owners, designers and various organizations involved in the planning, design, construction, operation, maintenance and regulation of dams.

Bulletin 157, Small Dams: Design, Surveillance and Rehabilitation, was prepared as a guide for small dam owners, engineering, government agencies, developers and contractors who are in charge of the design, construction, operation, maintenance and safety of small dams. The bulletin says, “Design criteria and typical features for small dams are generally different from those for high dams, because the construction methods focus upon economy.” This bulletin presents the main recommendations to ensure that the dams will behave appropriately and with minimum cost.

Bulletin 166, Inspection of Dams following Earthquake Guidelines, is a revision of previous bulletin 62A, published in 1988. Inspection of dams following earthquakes is an important aspect in the integral safety concept of dams, ICOLD says. Since 1988, earthquakes have occurred that have caused damage to dams. “Large dams should be able to resist the effects of the strongest ground shaking to be expected at the dam site. However, major damage is accepted as long as there is no catastrophic release of water from the reservoir,” the bulletin says.

All four bulletins are available for purchase at http://www.icold-cigb.org/GB/Publications/bulletin.asp.

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