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为了解沙尘暴多发区和田地区主要地表类型的土壤风蚀量情况,利用集沙仪进行了中、小尺度条件下的沙尘暴实地测定,结果表明:在中尺度下,主要地表类型沙漠、过渡带和绿洲土壤输沙量、降尘量具有显著性差异,并与覆盖度存在明显的相关性。在小尺度下观测的结果表明,不同地表类型输沙量也存在显著差异,相同高度下平均覆盖度82%的农田输沙量不足沙漠输沙量的10%,沙漠观测点下风口输沙量比上风口增长2.39%,弃耕地下风口输沙量比上风口增长7.90%,而覆盖农田下风口输沙量比上风口减少2.24%,说明提高植被覆盖对减少当地土壤风蚀的重要性。
In order to understand the amount of wind erosion on the main surface types in the Hetian area in the dust storm area, the sandstorm was used to determine the sandstorm in medium and small scale. The results show that at the mesoscale, the main surface types of deserts, transitional zones and oases Soil sediment yield, dustfall have significant differences, and there is a clear correlation with the coverage. The results of the observation at the small scale show that there are also significant differences in sediment load of different types of land surface. Under the same height, 82% of the average coverage of farmland is less than 10% of the sediment discharge in the desert, Which increased by 2.39% compared with that of the outlet. The sediment discharge of the abandoned veterinary outlet increased by 7.90% over the upper outlet, and the sediment discharge of the covered farmland under the outlet decreased by 2.24% over the outlet, indicating the importance of increasing vegetation cover to reduce the wind erosion of the local soil.