Studies on efficiency of water-proof layer in soil

The water-saving technique, which prevents water from downward seepage and salts from upward, was proposed on the basis of analysis of the two major p rocesses of material differentiation in the desertification process of semi arid zone, The organic-inorganic complex materials are water emulsion, whic h are composed of the polymer and clay, possesses a clay penetrability and can penetrate coarse sand to react with calcium ions from soil to form a ge l waterproof layer, which can prevent water from seepage.