Question

Arrange the following irrigation efficiencies starting from source of water to water needed in the root zone:
A. Reservoir storage efficiency
B. Application efficiency
C. Storage efficiency
D. Conveyance efficiency
Choose the correct answer from the options given below:

• A. A, B, C, D
• B. A, D, C, B
• C. A, D, B, C
• D. A, D, C, B

Hint:

Think of the water's journey: 1. Stored in Reservoir (\textbf{Reservoir Eff.}) \(\rightarrow\) 2. Travels in Canals (\textbf{Conveyance Eff.}) \(\rightarrow\) 3. Put on the Field (\textbf{Application Eff.}) \(\rightarrow\) 4. Soaks into Root Zone (\textbf{Storage Eff.}).

Answer 1

The Correct Option is C

Step 1: Trace the path of water from the source to the crop's root zone.
1. Water starts in a reservoir.
2. It is conveyed through canals to the field.
3. It is applied to the field surface.
4. It is then stored in the root zone where the crop can use it.
Each step has an associated efficiency that measures water losses.
Step 2: Arrange the efficiencies in the order of the water's path.
- A. Reservoir storage efficiency: This relates to losses (like evaporation and seepage) from the main water source, the reservoir. This is the very first stage.
- D. Conveyance efficiency: This measures the efficiency of the canal system in delivering water from the reservoir to the field inlet. Losses here are due to seepage and evaporation in the canals. This is the second stage.
- B. Application efficiency: Once water reaches the field, this measures how uniformly it is applied over the field surface. Losses are primarily deep percolation and surface runoff from the field. This is the third stage.
- C. Storage efficiency: This measures how effectively the applied water is stored within the root zone depth where the plants can access it. This is the final stage in getting water to the root zone.
The correct sequence is A \(\rightarrow\) D \(\rightarrow\) B \(\rightarrow\) C.