| Author | Singh, Gauri Shankar Prasad |
| Call Number | AIT Thesis no.WA-90-34 |
| Subject(s) | Chandra Canal Irrigation Project
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | The effective use of irrigation systems in Nepal in challenging to the farmers themselves because of the complex nature of the problems. Most systems are not operating at the desired level of efficiency for one reason or the other.
The study was conducted in the Chandra Canal Irrigation Project in the Eastern Region of Nepal which was implemented more than 60 years back but performance evaluation of the system was not carried out so far. The project was essentially designed for summer crops, basically rice. After the introduction of wheat crop, the availability of water for winter crop has been the main constraint to anticipated significant increase in agriculture production. Hence an improved irrigation management to use the limited water efficiently becomes and key issue.
The crop water requirements for monthly periods have been computed for wheat crop. The computation of the reference crop evapotranspiration has been done based on climatic data. Irrigation water requirements are computed deducting effective rainfall as well as ground water contribution and by adding the operational wastes and deep percolation losses including routine leaching.
From the available water supply additional 800 ha of land of wheat crop is expected to meet the peak gross irrigation water requirements which increase the overall cropping intercity from 161.8/% to 169.4% The conveyance efficiency of the project, field canal efficiency and application efficiency are calculated as 45.5%, 66.6% and 82.7% respectively. The overall project efficiency of the project is about 25%. The index of satisfaction of the system for head, middle and tail reached are found as 0.81, 0.82 and 0.68 respectively. The overall index of satisfaction of the system is found to be 0.76.
Ineffective control and management in the irrigation system are the main obstruction to the efficient water use. Not well defined rules, lack of farmer's participation and improportional distributions result into over irrigation at the upstream reach and lack of water at the tail eng. Proper maintenance to the irrigation system requires timely supply and distribution of adequate quantity of water in the main, secondary and tertiary components of the system. |
| Year | 1990 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Water Resources Research Engineering (WA) |
| Chairperson(s) | Paudyal, Guna N. ;Goto, Akira
|
| Examination Committee(s) | Loof, Rainer
|
| Scholarship Donor(s) | JICA, Government of Japan |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology,1990 |