Water Requirement of Crops MCQ with answer and solution

Concept

Understanding the hierarchy and definitions of command areas in irrigation engineering, such as GCA, CCA, and cropped area.

Step-by-step solution

1. Identify the components of a command area: Gross Command Area (GCA), Cultivable Command Area (CCA), Cultivated/Cropped Area. 2. Gross Command Area is the total area that can be irrigated by a canal system. 3. Cultivable Command Area is the portion of GCA where cultivation is possible. 4. Cropped area is the area actually sown under crops. 5. Drainage basin is a hydrological catchment area, hence not a component of an irrigation command area.

Explanation

In irrigation engineering, the command area of a canal system is typically divided into Gross Command Area (GCA), Cultivable Command Area (CCA), and Cultivated or Cropped Area. A drainage basin is a geographical hydrological unit where all runoff converges to a single point, not a sub-component of an irrigation command area.

Shortcut

Remember the three main irrigation areas: GCA > CCA > Cropped Area. Drainage basin is purely hydrological.

Common mistake

Confusing hydrological terms like drainage basin with irrigation command area components.