39. Duty and Delta
Duty and Delta are essential principles in irrigation engineering that govern the relationship between water supply and land area irrigated. Understanding these concepts is crucial for effective irrigation planning and water management, aimed at optimizing agricultural productivity while minimizing water waste.
Enroll to start learning
You've not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.
Sections
Navigate through the learning materials and practice exercises.
What we have learnt
- Delta (Δ) represents the total depth of water required by a crop during its growth cycle.
- Duty (D) indicates the area that can be irrigated using a unit discharge of water.
- The relationship between Duty and Delta helps in efficient irrigation system design and management.
Key Concepts
- -- Delta (Δ)
- The total depth of water required by a crop during its entire growth period, measured in cm or meters.
- -- Duty (D)
- The area of land that can be irrigated with one unit of discharge of water flowing continuously, expressed in hectares/cumec.
- -- Gross Duty
- The water measured at the head of the canal system.
- -- Net Duty
- The water available at the field level after losses in conveyance.
- -- Factors Affecting Duty
- Includes soil type, crop type, climate conditions, irrigation practices, topography, and canal losses.
- -- Methods to Improve Duty
- Strategies such as canal lining, rotational supply methods, modern irrigation techniques, field leveling, and effective drainage.
Additional Learning Materials
Supplementary resources to enhance your learning experience.