Dams are part of human achievements that induce great benefits for
society but also bear a potential risk to people, property and the
natural environment. The risk of a dam rupture is extremely low and
diffi cult to quantify accurately. The aim of 'Dam surveillance'
(ICOLD Bulletin 158), is to help reduce these risks by early
detection of an undesirable event. The objective of dam
surveillance is to make a precise and timely diagnosis of the
behavior of dams, in order to prevent undesirable consequences.
Both the monitoring system and surveillance program has to be
designed and should be able to detect any abnormal behaviour. 'Dam
surveillance' (ICOLD Bulletin 158), emphasizes the following
aspects: * Routine visual inspection * Special inspection *
Checking and testing of Hydro-electromechanical equipment *
Monitoring parameters and devices * Automation * Maintenance of
ageing monitoring systems * Re-instrumentation of existing dams *
Recent developments * Data management * Dam documentation
management * Assessment of dam condition and behaviour * Assessment
of routine dam safety monitoring programme * Prioritization of
maintenance, remedial and upgrading works.
General
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