50. Lining of Canals – Types of Lining – Advantages and Disadvantages

50.2.1 Rigid Linings

Rigid linings are impermeable canal linings made from hard materials like concrete, brick, and stone, designed to prevent water seepage and enhance hydraulic efficiency.

50.2.1.a Cement Concrete Lining

Cement concrete lining is a widely used type of rigid canal lining providing high impermeability and strength to reduce water loss.

50.2.1.b Brick Lining

Brick lining is an economical method of canal construction involving the use of bricks laid with cement mortar to prevent seepage and protect canals from erosion.

50.2.1.c Stone Masonry Lining

Stone masonry lining involves using cut or random rubble stones to line canals, particularly in areas where such materials are abundant.

50.2.2 Flexible Linings

Flexible linings are adaptable canal linings that can adjust to minor soil movements, making them suitable for temporary or low-budget projects.

50.2.2.a Compacted Clay Lining

Compacted clay lining is a method of creating a dense, impermeable surface in canals using compacted layers of clay, which is cost-effective and locally available.

50.2.2.b Bituminous Lining

Bituminous lining involves applying bitumen or asphalt over a prepared surface to create a water-resistant layer in canals.

50.2.2.c Plastic Membrane Lining (LDPE, HDPE, PVC)