Question

Which of the following efficiency is related with irrigation and drainage?
(A) Water Conveyance Efficiency and Water Application Efficiency
(B) Water Storage Efficiency and Water Distribution Efficiency
(C) Water Use Efficiency and Consumptive Use Efficiency
(D) Volumetric Efficiency and Water Application Efficiency
Choose the correct answer from the options given below:

• A. (A), (B) and (C) only.
• B. (A), (B) and (D) only.
• C. (A), (B), (C) and (D).
• D. (B), (C) and (D) only.

Hint:

To remember the core irrigation efficiencies:
Conveyance (\(\eta_c\)) \(\rightarrow\) Application (\(\eta_a\)) \(\rightarrow\) Storage (\(\eta_s\)) \(\rightarrow\) Distribution (\(\eta_d\)).
All of these quantify the pathway of water from the reservoir to the crop root zone.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Irrigation efficiencies are quantitative measures used to evaluate how effectively water is diverted, conveyed, stored, and utilized within an agricultural system.
These metrics help identify where water losses occur and guide the design of better water management practices.

Step 2: Detailed Explanation:
Let us analyze each of the efficiency concepts listed:
- (A) Water Conveyance Efficiency (\(\eta_c\)) & Water Application Efficiency (\(\eta_a\)):
- \(\eta_c\) measures the ratio of water delivered to the field to the water diverted from the source (accounting for canal seepage and evaporation losses).
- \(\eta_a\) measures the ratio of water stored in the root zone to the water delivered to the field. These are core irrigation terms.
- (B) Water Storage Efficiency (\(\eta_s\)) & Water Distribution Efficiency (\(\eta_d\)):
- \(\eta_s\) measures the ratio of water stored in the root zone during irrigation to the water needed prior to irrigation.
- \(\eta_d\) measures how uniformly water is distributed across the field. These are standard irrigation terms.
- (C) Water Use Efficiency (WUE) & Consumptive Use Efficiency (\(\eta_{cu}\)):
- WUE represents the yield produced per unit of water consumed.
- \(\eta_{cu}\) measures the ratio of consumptive water use (evapotranspiration) to the total water depleted. These are vital agricultural water management terms.
- (D) Volumetric Efficiency: This is a term primarily used in mechanical engineering to describe the efficiency of internal combustion engines or reciprocating pumps (comparing the actual volume of fluid moved to the theoretical displacement volume). It is not a standard irrigation efficiency term.
Therefore, (A), (B), and (C) are directly related to irrigation and drainage.

Step 3: Final Answer:
The correct option is (A).