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一、引洮灌溉区及总干渠陇西区黄土的一般特点引洮灌溉区位于南北以黄、渭水系为界、西起洮河岸、东至马莲河畔的黄土高原上。其中以六盘山横断为陇东及陇西两个自然区。引洮总干渠自西向东横贯于黄土高原之中。在工作中,我们仅对六盘山以西,即陇西区与渠道工程有关的黄土进行过研究。本区地貌可以分为两大类型,即
I. Introduction The general characteristics of the loess in the Longxi District of the Irrigation Area and the General Trunk Channel The irrigation area is located on the Loess Plateau along the banks of the Yellow River and Weihe River in the north and south and the Lo River Plateau to the east of the Malian River in the west. Among them, the Liupan Mountain is a cross-section of two natural areas, Longdong and Longxi.引 洮 The main canal runs from west to east in the Loess Plateau. In our work, we have only studied the loess related to channel engineering in the west of Liupan Mountain, that is, Longxi District. The area landscape can be divided into two types, namely