Feasibility of irrigation canal linings in Bangladesh |
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| Authors: | M. A. S. Mandal S. C. Dutta A. Khair M. R. Biswas |
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| Affiliation: | 1. Associate Professor of Agricultural Economics , Bangladesh Agricultural University (BAU) , Mymensingh, Bangladesh;2. Visiting fellow at Queen Elizabeth House , Oxford, UK;3. Assistant Professor of Irrigation and Water Management , BAU;4. Graduate research scholar at Silsoe College , UK;5. Graduate research scholar at the University of Newcastle , UK;6. Professor of Irrigation and Water Management , BAU |
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| Abstract: | This paper discusses the results of a financial analysis of alternative canal lining techniques on the basis of technical data generated through a series of field experiments. It reveals that for sand soils, constituting 27% of the total irrigable area of Bangladesh, brick lining, precast sections, soil cement, asphalt mats and also clay lining can generate positive financial benefits; but the formidable physical constraints, besides high initial investment costs, may discourage the widescale adoption of these linings. The paper concludes that for fine‐textured soils, representing 62% of the total irrigable area, considerable water can be saved by simple compaction of earthen canals using proper engineering design specifications. |
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