Check Dam Definition and Function
Check dams are small artificial barriers constructed across water channels, such as gullies or small streams, primarily to reduce water flow velocity. This action helps in minimizing soil erosion and facilitates groundwater recharge by retaining water.
They are typically built using locally available materials like stones, bricks, or concrete, or can be constructed from earthen material.
Considering the options provided:
- Option 1 accurately describes check dams as "Earthen or concrete structures across flooded gullies". This aligns with their construction and placement.
- Option 2 is incorrect as check dams serve broader purposes than just industrial water supply.
- Option 3 describes geological landforms, not artificial structures.
- Option 4 describes dwellings, unrelated to check dams.
Therefore, the correct definition highlights their nature as structures built across gullies.
Important Questions from Environment Problems
Which one of the following is NOT a cause of depletion in groundwater?
The following 6 (Six) items consist of two statements, Statement I and Statement II. Examine these two statements carefully and select the correct answer using the code given below.
Statement I: Ozone is a triatomic molecule of oxygen.
Statement II: Ozone is concentrated mainly in the stratosphere.
Which one of the following is not a Green House Gas?
Which of the following is NOT a greenhouse gas?
________ is one of the major factor responsible for deforestation.
