This is the study of a new canal lining method which will prevent otherwise inevitable seepage loss quite economically and effectively.
So far many canal lining methods have been developed and applied to practical work but a tremendous length of canal is still remaining unlined.
On the other hand, irrigation water cost is getting higher year after year. Attention must be paid therefore, to guiding the water from the intake facility to each final field reducing percolation loss as much as possible, or keeping low water conveyance loss, in other words.
In this new method plastics film should be laid under the earth surface of canal. In this way this kind of film can be kept perfectly off from the weathering action of sunlight. This will result in a quite long service life of the material. In addition, the Canals constructed in this way can be as stable as ordinary earth canals because of the special setting method of the film.
