Patent ID: 8113739

Claim:
A sand drift prevention method characterized in that a plurality of columnar sandbags made of a tubular knit fabric knitted by use of a polylactic-acid fiber with sand being filled inside the columnar sandbags, the cross-sectional area of each of the columnar sandbags being 10 to 400 cm 2 , are arranged at such a pitch that 3 to 30 sandbags are disposed for every ten meters on a sandy soil surface so as to cross over one another and form a grid pattern, whereby each grid surrounds a portion of the sandy soil surface, and thereby drifting of sand due to the force of wind is prevented, and wherein the volume of sand filled in the sandbags is 0.1 m 3 to 50 m 3 for every 100 square meters of the sandy soil surface.