关键词: 拦沙环, 沙坝, 荒漠化, 抗风蚀

Abstract: Sandy desertification is one of the most serious environmental problems in the world. Sand-blocked loop engineering, as a new technique for sand-control, takes full advantage of wind's powerfully transporting dynamics and gradually accumulates sands under it. Finally, a sandbank will be constructed and the sand-blocked loop be lifted along with the sandbank being piled up. Then the shifting sands can be continuously blocked by sandbank. Under different wind speeds, we had tested the effect of sand-blocking loops with different sizes in a field wind tunnel. It has been concluded that the technique of sand-blocked loop engineering is feasible in practice suggested by analysis on the efficiency and capacity of the engineering.

Key words: sand-blocking loop, sandbank, desertification, resistance to wind erosion