Modelling of an irrigation scheme with sediment-laden water for improved water management: a case study of Sunsari Morang Irrigation Scheme, Nepal

K. Paudel, E. Schultz, H. Depeweg

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1 Citation (Scopus)

Abstract

Irrigation schemes with sediment-laden water are generally performing significantly below expectation and potential. Managing such irrigation schemes is challenging as in most cases the management aspects of sediment transport were not included in the design process and in some cases the proposed management plans are difficult to follow. The sediment transport process is affected by the flow conditions in the canal, and the latter are affected by the canal operation modes. Hence, system management is one of the important aspects that influence the sediment transport process. The mathematical model SETRIC has been used to analyse the existing management mode and its effect on the sediment transport process of the Sunsari Morang Irrigation Scheme in Nepal. Evaluation showed that the sub-secondary canals of the Secondary Canal S9 have different sediment transport capacities. Some canals are facing more deposition problems than others. The problem is further increased by the existing water delivery mode. The modelling results show that it is possible to reduce sedimentation problems by improving existing water management practices. The proposed water management plan, based on the existing infrastructure, could be implemented to address the sediment transport problems in this scheme and other schemes with appropriate adaptation
Original languageEnglish
Pages (from-to)161-169
JournalIrrigation and Drainage
Volume62
Issue number2
DOIs
Publication statusPublished - 2013

Keywords

  • transport

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