Introduction In the foreword to the Malaysian Guidelines for Operation, Maintenance and Surveillance of Dams (Malaysian Inter-Departmental Committee on Dam Safety 1989), it is stated “The expanding inventory of dams has brought into focus the subject of dam safety”. At the time of the guideline publication, there had been a considerable increase in the inventory of dams with those constructed d...

Rockfill dams are accounted as useful measures in watershed management projects. How-ever, the sediment transport through the rockfill materials, could impact their lifetime duration. Previously, researches have been conducted to describe the various hydraulically issues of the flow passing through these structures However; there is no general relationship to estimate the sediment transport rat...

A survey conducted near a dam-site on the Paraguay-Argentine border showed the area to be highly endemic for Chagas’ disease. It also showed that new housing unsuited to the disease vector’s prol$eration did not eliminate the prob/em, indicating a strong need for health education capable of guiding people away from traditional behavior patterm tending to encourage the vector and cause infection.

Influence of air entrainment on rock scour development and block stability in plunge pools The impingement of high-velocity water jets on plunge pools, such as it occurs downstream of spillways of high-head dams, may cause scour on the rock foundations. The scour process is the result of complex and consecutive physical phenomena. Turbulence plays a major role, especially in the jet development...