Documentação Técnica

Documentação Técnica
* Engenharia de Dragagem, Sinalização Náutica, Batimetria, Projetos de Canais Navegáveis, Meio Ambiente, Cartas Náuticas, Software de Navegação, Topografia Básica e outros assuntos técnicos.

* Os leitores poderão ter acesso e fazer download do material na parte inferior desta página.

domingo, 13 de fevereiro de 2011

PORT DEVELOPMENT - A HANDBOOK FOR PLANNERS IN DEVELOPING COUNTRIES

DRY BULK CARGO TERMINALS

Dry bulk cargo terminal planning charts I and II* are used in the same way as break-bulk cargo terminal planning charts I and II. The planner needs the following basic information in order to be able to utilize these charts: ship-loader/unloader rated capacities; average shipment size; number of ships per year; average ship cost per day; and number of berth commission days per year.

Dry Bulk Cargo Terminal - Planning Chart (Berth Time)

The planner enters planning chart I with the figure indicating the rated capacity; he then draws a vertical line to make a turning-point where it meets the through-ship efficiency factor. He then moves horizontally to the left to the next turning-point with the appropriate line for the number of ship-loadersiunloaders employed per berth. He descends again to the standard number of ship operating hours per day, then moves horizontally to the right to the turning-point with the curve indicating average shipment size and finally draws a vertical line up to the average berth time for individual ships. A typical two-hour delay for berthing and deberthing ships has been added to this average time. When the actual delay differs from this, the average berth time can be adjusted accordingly.

The turning-points on the axes give the planner the following information: effective capacity of each ship-loader or unloader; through-ship gross loading or unloading rate: through-ship net loading or unloading rate (which is equivalent to the gross rate if the berth is worked 24 hours per day); and average berth time for individual ships. The through-ship net rate is a key figure in describing the productivity of a bulk berth.

* Chart  II (ship cost) will be presented in another post, together with its comments.

Fonte: UNCTAD, Port Development - A handbook for planners in developing countries.

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