A study of seepage losses from irrigation canals : a case study of the Kankai Irrigation System, Nepal | |
| Author | Khatri, Tilak Bahadur |
| Call Number | AIT Thesis no.WM-97-20 |
| Subject(s) | Kankai Irrigation System Seepage--Nepal |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering. School of Civil Engineering |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. WM-97-20 |
| Abstract | The development of improved i1Tigation management procedures for existing and the design of new irrigation systems can be greatly benefited from the measurements and knowledge of the canal losses in the field conditions. Since the losses range are higher up to 45% of the total flow, several techniques are developed in measuring and accounting. Application of the various linings are being adopted in order to minimize of such losses. But due to comparatively higher costs, the developing countries are have some difficulties on their applications. This study was conducted in the Kankai Irrigation System during summer for the measuring of the seepage losses and observation of annual operation and maintenance expenditures. The average seepage were found to be 0.494% per km (0.164 m/day) from the lined canal and 2.106% per km (0.264 m/day) from the unlined canal. The seepage from the unlined canal is found normal and the lined canal found comparatively a higher seepage. The high seepage from the concrete lining may be due to the cracks and less maintenance. The maintenance expenditure of an unlined canal was found to be 3 to 4 times higher than that of a lined canal of the same capacity. Analysis and feasibility of the linings in the existing unlined canals are carried. With the present water charges, the benefits of the saved water due to lining are not sufficient to cover up the lining cost in most of the canals. But concrete lining is viable with an adoption of the volumetric water charges equal to that ofBhairawa Lumbini Ground Water Charges (A Government Managed Irrigation System, Nepal) instead of cropped area charging method in the irrigation system. |
| Year | 1998 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. WM-97-20 |
| Type | Thesis |
| School | School of Civil Engineering |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Water Engineering and Management (WM) |
| Chairperson(s) | Kubo, Naritaka; |
| Examination Committee(s) | Gupta, Ashim Das;Loof, Rainer; |
| Scholarship Donor(s) | Government of Germany ; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1998 |