A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Improved Operation of Minipe Left Bank Canal Irrigation System
The Minipe left bank canal has a head–tail water imbalance as a result of inadequate water availability, ineffective and unfair agricultural water distribution. To reduce the difference, Minipe anicut is raised by 3.5 m. Though ample water may be released by this step, due to poor management, irrigation water would not be evenly distributed along the canal. Therefore, developing an improved water distribution pattern in the canal is vital. The study focuses on establishing an operational strategy for the Minipe left bank canal irrigation system that would ensure the entire command area receives enough water during both the Yala and Maha seasons. This was accomplished through the use of simulation models. The Minipe left bank canal’s operational pattern was modeled using inflows and irrigation demands. The catchment inflows to the contour canal were determined based on rainfall-runoff models developed using HEC-HMS software. The CROPWAT program was used to estimate crop water requirements. Finally, the WEAP program was used to simulate irrigation system operation based on the water balance principle. By combining new cropping patterns, shifting sowing dates, and Minipe anicut discharges, six scenarios (including the Business-As-Usual Scenario) were evaluated. The study is focused more on lowering the unmet demands in the Yala season because they were significantly higher than unmet demands in the Maha season. A cropping pattern of 70% paddy and 30% other field crops, a 2-week delay in sowing date, and raising the Minipe anicut discharge by 15% in the Yala seasons were found to reduce unmet demands. According to the analysis, making the aforementioned adjustments will enhance the Minipe left bank canal operational pattern and reduce unmet demand by 75%.
Improved Operation of Minipe Left Bank Canal Irrigation System
The Minipe left bank canal has a head–tail water imbalance as a result of inadequate water availability, ineffective and unfair agricultural water distribution. To reduce the difference, Minipe anicut is raised by 3.5 m. Though ample water may be released by this step, due to poor management, irrigation water would not be evenly distributed along the canal. Therefore, developing an improved water distribution pattern in the canal is vital. The study focuses on establishing an operational strategy for the Minipe left bank canal irrigation system that would ensure the entire command area receives enough water during both the Yala and Maha seasons. This was accomplished through the use of simulation models. The Minipe left bank canal’s operational pattern was modeled using inflows and irrigation demands. The catchment inflows to the contour canal were determined based on rainfall-runoff models developed using HEC-HMS software. The CROPWAT program was used to estimate crop water requirements. Finally, the WEAP program was used to simulate irrigation system operation based on the water balance principle. By combining new cropping patterns, shifting sowing dates, and Minipe anicut discharges, six scenarios (including the Business-As-Usual Scenario) were evaluated. The study is focused more on lowering the unmet demands in the Yala season because they were significantly higher than unmet demands in the Maha season. A cropping pattern of 70% paddy and 30% other field crops, a 2-week delay in sowing date, and raising the Minipe anicut discharge by 15% in the Yala seasons were found to reduce unmet demands. According to the analysis, making the aforementioned adjustments will enhance the Minipe left bank canal operational pattern and reduce unmet demand by 75%.
Improved Operation of Minipe Left Bank Canal Irrigation System
Lecture Notes in Civil Engineering
Dissanayake, Ranjith (editor) / Mendis, Priyan (editor) / De Silva, Sudhira (editor) / Fernando, Shiromal (editor) / Konthesingha, Chaminda (editor) / Attanayake, Upul (editor) / Gajanayake, Pradeep (editor) / Ranwala, S. (author) / Silva, U. H. M. S. (author) / Nandalal, K. D. W. (author)
International Conference on Sustainable Built Environment ; 2023 ; Kandy, Sri Lanka
Proceedings of the 14th International Conference on Sustainable Built Environment ; Chapter: 23 ; 311-324
2024-08-28
14 pages
Article/Chapter (Book)
Electronic Resource
English
Improved operation of large irrigation canal systems in southeast Asia
| Taylor & Francis Verlag | 1994
Improved Operation of Large Irrigation Canal Systems in Southeast Asia
| Online Contents | 1994
Modernized Irrigation in Pakistan: The Case of the Chashma Right Bank Canal Irrigation System
| British Library Conference Proceedings | 1992
Modernized Irrigation in Pakistan: The case of the Chashma Right Bank Canal Irrigation System
| British Library Conference Proceedings | 1992
| UB Braunschweig | 1977