CHANNEL CROSS-SECTION The channel sections for an irrigation canal may be of the following four types. 1. Canal in cutting. 2. Canal in filling. 3. Canal in heavy filling. 4. Canal partly in cutting and filling. 1. Canal in Cutting. This canal does not require any bank as F.S.L. lies below the G.L. If F.S.L. is just at the G.L., small banks may have to be provided. In this section F.S.L. of canal lies just at G.L. or slightly below it. See Fig. 19.2 (a).   2. Canal in Filling. In such a section the bed level of the canal lies at the G.L. Section whose bed level is slightly above the G.L. also comes under this category. See Fig. 19.3 (a). 3. Canal in Heavy Filling. In this section, the bed level of the canal lies substantially above the G.L. Such a section should as far as possible be…