Duty, Delta and Base Period and their relationship Irrigation Engineering WRE Irrigation engineering

1. RAMANUJ JALDHARIV Sem

2. INTRODUCTON

3. Field Capacity IMP

4. DUTY, DELTA & BASE PERIOD

5. DUTY, DELTA & BASE PERIOD

6. Crop Period

7. Base Period

8. DUTY at Different Places
 Duty at the head of main canal is called - Gross Quantity
 Duty at head of branch canal is called- Littoral Quantity
 Duty at head of Major or Minor distributory canals is called
- Net Quantity
 Duty of entry or exit of field channel is called “Outlet
factor” or “Discharge factor”.

9. Factors Affecting DUTY
1. Method of Irrigation
2. System of irrigation
3. Mode of applying water to crops
4. Climatic condition of the area
5. Type of crop
6. Quality of irrigation water
7. Topography
8. Base period of crop
9. Type of soil and subsoil of the area
10. Time of irrigation and frequency of cultivation
11. Canal conditions
12. Character of soil and subsoil of canal

10. RELATION B/W DUTY, DELTA & BASE
PERIOD

11. PUNCH LINERS

12. Irrigation Efficencies

13. Questions 4 U…
What is duty for particular crops?

14. Questions 4 U…
What is required quantity of water?

15. Questions 4 U…
Question Find the Reservoir capacity for a field having area
of 40,000 hectare which requirements are given below. If
there are seepage loss 10% and evaporation losses is 20%.

16. Questions 4 U…

17. Questions 4 U…

18. Any Query……???