黑河上游地貌面分布数据

黑河上游祁连附近地貌面包括一级剥蚀面（宽谷面），9级河流阶地面。阶地面分布数据主要通过野外考察获取，对各级地貌面分布范围进行GPS测量，在室内把野外资料进行分析，再结合遥感影像、地形图、地质图等资料，绘制得到黑河上游各级地貌面分布图。剥蚀面的年代在1.4Ma左右，黑河阶地形成晚于这一时代，都为晚更新世以来阶地。

The landform surfaces near the Qilian Mountains in the upper reaches of the Heihe River consist of one denudation surface (wide valley surface) and nine levels of river terrace surfaces. The distribution data of terrace surfaces were primarily collected via field surveys: the distribution extents of each level of landform surfaces were measured using GPS, followed by indoor analysis of the field data. Combining these with remote sensing images, topographic maps, geological maps and other related materials, the distribution maps of each level of landform surfaces in the upper reaches of the Heihe River were finally compiled. The age of the denudation surface is approximately 1.4 Ma, and the formation of the Heihe River terraces postdates this time period, with all terraces having formed since the Late Pleistocene.