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一、塌高与库容、回水面积关系的一般特性西北黄土丘陵区的沟道地形,一般是比降大,沟坡陡,沟床下切成槽,河槽两岸或为斜坡地,或由台坪转为斜坡地。陕北地区大部为石沟床,沟岸岩层露头愈高的,沟坡愈陡,河槽两岸坡度较缓的台坪地或斜坡耕地与沟床的相对高差,多在十公尺左右。以上大都系荒崖或峭壁,这种地形条件规定了土坝坝高与库容,回水面积关系曲线的一般特性。在一定坝高范围内,库容与回水面积(或淤地面积)的增加率为最
First, the collapse of the reservoir and the backwater area of the general characteristics of the relationship The channel in Northwest Loess Hilly terrain, generally larger than the ditch, steep ditch bed groove cut into the river, both sides of the channel or slope, or by the Ping Turn to slopes. Most of the northern part of Shaanxi is the Shigouou bed. The higher the outcrop of the gully strata is, the steeper the gully slope. The relative elevation difference between the flat land or the sloped cultivated land and the ditch bed on both sides of the channel is more than ten meters. Mostly above the cliffs or cliffs, this terrain conditions for the earth dam dam height and storage capacity, backwater area of the general characteristics of the relationship curve. In a certain range of dam height, storage capacity and backwater area (or silt area) increase rate is the most