论文部分内容阅读
泥流沟是黄土高原,半干旱沟壑区水土流失的主要侵蚀方式之一。这种侵蚀以地下水为动力,在冻融交替条件下发生的一种沟蚀现象,与暴雨切冲的沟蚀不同,是由当地特殊的地质结构、地貌、水文及气候条件所决定的。这种泥流沟分布比较广。据调查占唐家堡河流域总面积的9.1％。目前对泥石流和大面积的黄土滑坡研究报导的论文比较多,但对泥流沟的研究报导国内很少见到。为此,我们在定西唐家堡河上游,对泥流沟形成的原因进行了多点调查,在万家岔泥流沟进行定位观察,并结合有关文献,分析探讨泥流沟形成的原因如下。
Mud ditch is one of the main erosion ways of soil and water loss in the Loess Plateau and semiarid gully areas. This erosion is driven by groundwater. A type of gully erosion that takes place under alternate freeze-thaw conditions is different from the gully erosion caused by heavy rainfall. It is determined by the special geologic structure, physiognomy, hydrology and climatic conditions of the area. This muddy ditch is widely distributed. According to the survey accounted for 9.1% of the total area of Tang Jiabao River Basin. At present, there are many papers on the research of debris flow and large-area loess landslide, but the research reports on the ditch are rarely seen in China. For this reason, we conducted a multi-point investigation into the reasons for the formation of muddy ditch in the upper reaches of Jiabao River, Dingxi Tang, and observed the position of muddy ditch in Wanjiacha. Combined with the relevant literature, we analyzed the reasons for the formation of muddy ditch as follows .