RT - Journal Article T1 - Application of BSNE Sampler to Evaluate Vertical Distribution of Wind Eroded Sediment in Eastern Isfahan JF - JSTNAR YR - 2002 JO - JSTNAR VO - 6 IS - 3 UR - http://jstnar.iut.ac.ir/article-1-217-en.html SP - 121 EP - 139 K1 - BSNE Sampler K1 - Wind erosion K1 - Trapping efficiency K1 - Particle size distribution AB - For the study of field wind erosion and the design and evaluation of wind erosion control techniques, detailed observations of soil particle transport and vertical destribution of eroded soil particles are needed. The objectives of this study were: 1) To describe one device for soil transport particle measurement, i. e. the BSNE sediment catcher and 2) To assess vertical distribution of wind–eroded sediment with height in eastern Isfahan. The BSNE sediment catcher is a wind erosion sampler that traps eroded material at seven heights of 0.24, 0.60, 1.08, 2.00, 3.00, and 4.00 m above the soil surface. Each trap consists of a steel container with an inlet and outlet, mounted on a wind vane that rotates about a central pole. Before using the sampler in the field, it was tested and calibrated in the wind tunnel. The results showed that the average trapping efficiency with speeds ranging from 5.2 to 7.2 m sec-1 for 4 different wind–eroded sediments was 0.44 to 0.68. However the trapping efficiency depended on wind speed, particle size distribution, particle density and type of sediment. The sampler had the lowest efficiency for particles < 44 μm. A BSNE sediment catcher was installed in Babaii Air Base. After a sampling period, the sediment in each trap was collected and weighed. The trapped materials were a mixture of saltation and suspension particles. Vertical distribution of wind–eroded sediment showed that the amount of soil collected decreased with increased height and the percentage of fine particles ( LA eng UL http://jstnar.iut.ac.ir/article-1-217-en.html M3 ER -