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高山雪原区域的水土流失监测尤其需要重视冻融侵蚀。为充分研究高山雪原区的冻融侵蚀规律,以大渡河流域为项目区进行遥感监测,选取地温年较差、降水量、植被覆盖度、土壤类型、坡度、坡向等6个侵蚀单因子及其评价指数,采用“加权加和”方法进行冻融侵蚀综合评价指数的计算和冻融侵蚀强度分级。最终完成了大渡河流域冻融侵蚀监测成果,掌握了冻融侵蚀空间分布特征,总结冻融侵蚀变化趋势。该研究成果对相似自然条件的高山雪原地区的冻融侵蚀具有借鉴意义,并可为该地区的水土保持规划提供科学决策依据。
In particular, the monitoring of soil and water loss in the snowfields should pay attention to the erosion and erosion. In order to fully study the law of freeze-thaw erosion in the alpine snowfields, the Dadu River Basin was used as the project area for remote sensing monitoring. Six erosion single factors such as poor geothermal years, precipitation, vegetation cover, soil types, slope and aspect, The evaluation index, the “weighted sum” method for the calculation of freeze-thaw erosion comprehensive evaluation index and freeze-thaw erosion intensity classification. Finally, the monitoring results of the freeze-thaw erosion in the Dadu River Basin were completed, the spatial distribution of the freeze-thaw erosion was grasped, and the trend of the freeze-thaw erosion was summarized. The results of this study can be used for reference to freeze-thaw erosion in alpine snowfields with similar natural conditions and provide a scientific basis for the planning of soil and water conservation in the area.