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Requirements Planning Dams

a) High Dam
Is the distance from the foundation to the level of the reservoir at the time of construction of spillway water flow capacity planning, coupled with a high specific surveillance to boost wind, waves, ice and freezing power of motion earthquakes.

b) Width Lighthouse
Width mercu urugan dam must be strong enough to keep the line of the upper surface seepage preatik or remain in the dam in time. Mercu width should be sufficient to withstand the pounding earthquakes and wave power, the width of the dam low mecu can also dipengarnhi by secondary needs such as minimum maintenance road width of 3 meters.

c) Stability Construction
Meripakan construction calculations to determine the size (dimensions) dam to be able to withstand charges and the forces exerted on it under any circumstances.

The terms of the stability of the construction:

  • Upstream and downstream slopes of the dam should not be prone to landslides. Slopes upstream dams must be stable and safe in any circumstances either at the time the reservoir is empty, full of water and the water level drops suddenly. Similarly to the next downstream slope must be stable and safe under any circumstances, either at the time the reservoir is empty, full of water and the water level drops suddenly.
  • Safe teradap avalanches.
  • Safe to the decline of the dam.
  • Secure against seepage.


Dangerous conditions that must be reviewed in the calculation.
At the end of the construction of the ground investigation results both in the field and in the laboratory it can be concluded that the land can only be used optimally if the water level is reached this optimal mean the end of development, there are still a large water content so that the voltage is too large pores. Dangerous conditions that must be looked at is the slope downstream.
When the reservoirs were filled full of water and there are still higher seepage water surface, namely when the reservoir is filled with water full mernpakan dangerous state, so that the terms in the calculation.

A dangerous state to be reviewed is the slope downstream.
When the reservoir is partially charged and there remebesan fixed. It needs to be reviewed because longsomya dam depends on several factors that are sometimes dangerous precisely when the reservoir is not full but only in part, a dangerous situation that needs to be reviewed is the slope of the upstream. In reservoirs filled and the water is full of sudden. When the reservoir is fully charged then the pressure pore is very large, the inside of the reservoir under pressure upwards so that the weight is reduced, when the water level drops suddenly, the water from the pores will be very slow release, so it is still filled with water and in a state of saturation then weighed increases because the water pressure is above no longer exists.

Danger that should be reviewed is the upstream side.
Charges and forces to be reckoned forces acting on the body of the dam is gravity (the weight of a dam) hydrostatic pressure, the lifting force, the force of the earthquake. These forces propagated to the foundation and the foundation of the dam, which reacts to the dam with a force that is equal and opposite reaction pondsi. Pengarnh of pressures caused edapan sediment in the reservoir and dynamic forces caused by water flowing over the dam meungkin be considered in special things.