Water Pressure in Dams

The video tutorial discusses the forces acting on gravity dams, focusing on water pressure as the major external force. It explains the pressure distribution on a vertical upstream face and the effects of tail water. The tutorial also covers scenarios with partially inclined upstream faces, detailing the horizontal and vertical components of water pressure. The video concludes with a summary of the two main cases of water pressure on gravity dams.

What is the primary external force acting on gravity dams?

• Water pressure

• Seismic force

• Thermal expansion

• Wind pressure

How is the pressure distribution diagram shaped for a vertical upstream face?

• Triangular

• Rectangular

• Trapezoidal

• Circular

What is the formula for calculating the total horizontal water pressure on a vertical upstream face?

• w * h

• w * h / 2

• w * h^2 / 2

• w * h^2

What is the effect of tail water on the downstream side of a dam?

• No effect on pressure

• Increases vertical pressure only

• Increases horizontal pressure only

• Adds both horizontal and vertical pressure components

How is the water pressure represented when the surface is inclined?

• As both horizontal and vertical components

• As a single vertical component

• As a diagonal component

• As a single horizontal component

What happens to the water pressure when the upstream face is partially inclined?

• It has only a vertical component

• It remains the same as a vertical face

• It has only a horizontal component

• It has both horizontal and vertical components

Where does the horizontal component of water pressure act on a partially inclined upstream face?

• At the centroid of the triangle

• At the top of the dam

• At the base of the dam

• At the midpoint of the dam

What is the role of the centroid in the pressure distribution on a partially inclined face?

• It is where the vertical component acts

• It determines the maximum pressure point

• It is where the horizontal component acts

• It has no role in pressure distribution

In the summary, what is emphasized about the two cases of water pressure?

• The differences between vertical and inclined surfaces

• The similarities between vertical and inclined surfaces

• The effect of wind pressure

• The role of seismic forces

What is the main difference between the two cases of water pressure discussed?

• The orientation of the upstream face

• The presence of tail water

• The material of the dam

• The shape of the dam