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基于野外调查,遥感影像辨析和GIS技术,利用DEM、地形图、沙漠化图等图件以及气象资料,对青海共和盆地坡度、坡向和地表形态类型进行了统计分析,分析了青海共和盆地风水交互侵蚀的基本格局,初步得到:1)研究区坡面的侵蚀强弱呈现垂直分带性。在各流域的分布中,沙沟河流域的坡面切沟侵蚀最为严重;2)坡向与风向的夹角决定了风在谷地潜在的搬运和堆积能力,多石在沟的风水交互侵蚀作用经历了以半年为周期的风力作用沙丘形成、水力作用沙丘消减这样一个正、逆波动过程。盆地内河流两岸阳坡的冲(切)沟面积占总侵蚀沟的65%,且西南向阳坡的切(冲)沟发育良好,占沟道侵蚀总面积的22.8%;3)青海共和盆地流动沙丘、河流滩地和湖盆交错分布。水库以西,沙珠玉河中上游沙丘阻塞河道、沟槽侵蚀为风水交互侵蚀的主要形式。水库以东,河道沙丘交互侵蚀、坡面切沟侵蚀和丘间低地曲流分别是沙沟河流域与茫拉河流域风水交互侵蚀的主要形式,龙羊峡水库的风沙入库是风水两相作用的又一形式。
Based on the field survey, remote sensing image analysis and GIS technology, the paper analyzes the slope, aspect and surface topography of the Gonghe Basin in Qinghai Province by using the maps of DEM, topographic maps, desertification maps and other meteorological data. The basic pattern of erosion is obtained preliminarily: 1) The vertical and horizontal zonation of erosion on the slope surface in the study area. In the distribution of each basin, the erosion of the slope gully is the most serious in the Shagou River basin. 2) The angle between the slope and the wind direction determines the potential handling and accumulation ability of the wind in the valley and the interactive erosion of feng shui in the gully Experienced a six-year cycle of the formation of wind dunes, hydraulic dunes to reduce such a positive and negative fluctuations in the process. The area of red (cut) ditch on the sunny slope on both banks of the river basin accounts for 65% of the total erosion ditch, and the cut (red) ditch on the southwest sunny slope develops well, accounting for 22.8% of the total erosion area of the channel; 3) Dune, river beach and lake staggered distribution. To the west of the reservoir, the sand dunes in the middle and upper reaches of the Shazhuyu River block the river and the trench erosion is the main form of the interactive erosion of feng shui. The interaction between the east of the reservoir and the dune of the river, the erosion of the slope gully and the inflow of the mound between the hills are the main forms of the interactive erosion of feng shui in the Shagou River and the Mangla River respectively. Another form of role.