This investigation was conducted to estimate sand dune movement in Yulin and Jinbian areas of northern Shaanxi Province

China

Results indicate that total sand movement has been 24.433

21.147t for Yulin and Jinbian

respectively.The mean sand dune movement equates to a rate of 4.61 and 3.99m per year

but average monthly sand dune movement rates were 1.152 and 0.997m for the two locations respectively.The rates of movement occurred in Jul.follwed by Jun.

Aug.and Sep..Rates of movement depend on wind velocity

dune height

and dune length and slope ratio.The study reveals that cultivated lands extended obliquely to the direction of sand dune movement are extremely affected severely by the movement

while cultivated land segments extending parallel to the direction of movement are not affected.