论文部分内容阅读
利用子午岭地区梁坡高精度的GPS(Trimble 5700)实测数据对国内外已有的浅沟侵蚀临界模型进行了验证。结果表明,已有浅沟侵蚀临界模型模拟的子午岭地区浅沟侵蚀分布面积或大于实际浅沟侵蚀区的10%～40%,或小于实际的20%～35%。基于子午岭地区实测的梁坡GPS数据建立高分辩率的DEM,构建了适用于子午岭地区的浅沟侵蚀临界模型。利用实测GPS数据对所建浅沟侵蚀临界模型进行验证,发现用新建的浅沟侵蚀临界模型模拟的研究区梁坡浅沟侵蚀分布区与野外实际浅沟侵蚀分布区非常吻合,其误差仅为5%。
The critical model of shallow trench erosion at home and abroad has been verified by using the high precision GPS (Trimble 5700) data from Liangzao area. The results show that the distribution area of shallow trench erosion in the Ziwuling region simulated by the critical model of shallow trench erosion is larger than 10% ~ 40% of the actual shallow trench erosion area or less than the actual 20% ~ 35%. A DEM with high resolution was established based on the measured data of the Liangpo GPS data in the Ziwuling region. A critical model of shallow trench erosion suitable for the Ziwuling area was constructed. Using the measured GPS data to verify the critical model of the shallow trench erosion, we find that the shallow trench erosion distribution in the study area is in good agreement with the actual shallow trench erosion distribution in the study area. The error is only 5%.