侯马盆地冲积扇及其流域地貌发育规律

根据从DEM数据中提取的侯马盆地冲积扇及其流域的多项地貌指标,分析了各地貌指标的空间分布规律,并通过地貌指标的空间分布曲线与山前地形高程曲线形态的对比以及地貌指标相关性分析来揭示冲积扇及其流域地貌的发育规律。结果表明,在侯马盆地相对隆起部位的冲积扇及其流域的地貌指标与在盆地凹陷部位的冲积扇及其流域的地貌指标有较大差异;流域地貌指标的空间分布受到盆地边界断层构造活动性的影响;冲积扇的发育主要受到流域规模、山前构造活动以及盆地基准面等多种因素共同的影响;流域内岩性的差异不是造成研究区域内冲积扇地貌差异的主要因素。

Developments of Alluvial Fans and Their Catchments in Houma Basin

We collected indexes of alluvial fans and their drainage basins from DEM data, and analyzed distribution of these indexes. By comparison of distribution curves of these indexes with elevation distribution curve of piedmont landforms, we did some research on the developments of alluvial fans and their drainage basins. As a result, we find that the alluvial fans and their drainage basins in the uplift region of Houma basin differ greatly from those in the sunken region; distributions of drainage basin indexes are mainly influenced by tectonic activity of boundary fault; alluvial fans are influenced by factors of drainage basin, tectonic movement of boundary fault and base level together; and lithological difference between rocks and underlying drainage basins is not the main factor leading to difference in alluvial fans in the study area.