A dam that detains all or part of the flood waters of a river and gradually releases the stored water at controlled rates so that the entire region on the downstream side of the dam may be safeguarded against possible damage due to floods is known as
- Adetention damCorrect
- Bdiversion dam
- Ccofferdam
- Dnone of these
Solution
Concept
Detention Dam
Formula
No
Step-by-step solution
- Identify the structure designed to temporarily store floodwaters and release them at safe, controlled rates. - Recall that this type of flood-control dam is called a Detention Dam. - Select option a.
Explanation
A detention dam is built to temporarily store floodwaters during heavy rainfall and release the water slowly at a safe rate, preventing downstream areas from flooding.
Shortcut
Associate "detains flood waters" with "detention dam" (both use the root word "detain/detention").
Common mistake
Students often confuse a detention dam with a diversion dam or a cofferdam, confusing the function of temporarily storing floodwaters with diverting water for irrigation or building temporary enclosures for construction.
Correct answer: A) detention dam