Arch dam

High school (ages 12+)
Making & Design

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/arch-dam

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the structural mechanism?Arch action transfers hydrostatic pressure to canyon abutments
2. What is the geological requirement?Narrow canyons with strong, stable rock walls are essential
3. What is an arch dam and how does it hold back water?An arch dam is a curved wall that holds back a river. Its shape pushes the water pressure into the rock walls on either side, making it very strong and thin.
4. Why do arch dams need strong rock on both sides?The rock walls must be strong because the arch dam pushes the water force into them. If the rock can't handle the pressure, the dam could fail.

Hydrostatic Pressure: The force exerted by a fluid at rest, directly proportional to depth and fluid density.
Abutments: The solid rock or earth structures at the sides of a canyon that anchor the ends of an arch dam.
Arch Action: The structural behavior where a curved element transfers applied loads to its supports through compression.
Competent Rock: Geological material that is strong, stable, and capable of withstanding significant stress without fracturing.