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

Phase 1: Track the water's journey from its origin to the crop's root system.
1. Water originates in a reservoir.
2. Canals transport it to the agricultural area.
3. It is distributed across the land surface.
4. The root zone then holds the water, making it available for crop uptake.
Each stage is associated with an efficiency rating that quantifies water losses.
Phase 2: Order the efficiency ratings according to the water's flow.
- A. Reservoir efficiency: Assesses losses (evaporation, seepage) from the primary water source, the reservoir. This marks the initial stage.
- D. Conveyance efficiency: Evaluates the canal system's effectiveness in moving water from the reservoir to the field entrance. Losses include canal seepage and evaporation. This is the subsequent stage.
- B. Application efficiency: Once water reaches the field, this measures the uniformity of its distribution across the land. Primary losses are deep percolation and surface runoff. This is the third stage.
- C. Storage efficiency: Determines how well the applied water is retained within the root zone depth accessible to plants. This is the final step in delivering water to the root zone.
The correct sequence is A \(\rightarrow\) D \(\rightarrow\) B \(\rightarrow\) C.