基于HASM的黄土侵蚀地形重建方法研究

发布时间：2018-10-15 10:24

【摘要】：黄土高原是世界上侵蚀最强烈的区域之一,基于当前的地形信息对其地形进行重建可有效估算侵蚀量。该文基于高精度曲面建模(HASM)方法首先建立了黄土高原流域地形重建模型,并以多期人工模拟小流域为实例数据,从微观(坡度)和宏观(等高线)的角度分析了不同侵蚀阶段模拟小流域的地形重建结果,该地形重建结果具有较高精度,且处于侵蚀发育中期的小流域重建结果要优于处于侵蚀发育晚期的小流域重建结果。最后,以高程相对误差为指标定量分析了小流域地形重建的精度,结果显示,两个时期小流域重建结果的相对误差平均值分别为0.55%和0.57%,均方根误差分别为1.99%和2.73%,表明基于HASM方法的黄土流域地形重建方法是可行的。
[Abstract]:The Loess Plateau is one of the most eroded regions in the world. The erosion can be estimated effectively by the reconstruction of its topography based on the current topographic information. In this paper, based on the (HASM) method of high precision surface modeling, the terrain reconstruction model of Loess Plateau watershed is established, and the multi-period artificial simulation of small watershed is taken as an example. From the angle of microcosmic (slope) and macroscopic (contour), the terrain reconstruction results of simulated small watershed in different erosion stages are analyzed. The results of terrain reconstruction are of high accuracy. The result of small watershed reconstruction in the middle stage of erosion development is better than that in the late stage of erosion development. Finally, the accuracy of topographic reconstruction of small watershed is quantitatively analyzed with relative height error as the index. The results show that, The average relative error of the reconstruction results of the small watershed in the two periods is 0.55% and 0.57, respectively, and the root mean square error is 1.99% and 2.73, respectively, which indicates that the method of terrain reconstruction based on HASM method is feasible.
【作者单位】：滁州学院地理信息与旅游学院;安徽省地理信息集成应用协同创新中心;安徽省经济研究院;
【基金】：安徽省教育厅高校自然科学研究重点项目(KJ2016A536) 国家自然科学基金创新群体项目(41421001);国家自然科学基金项目(41601455、41571398、41501445)
【分类号】：S157

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