Previously, the typical curves follow a unit slope straight line.
这些典型曲线在早期为单位斜率直线。
The uneven natural slope surface has resulted in concentrated runoff, causing the variations of velocity and increased energy of unit width discharge.
自然坡面的非均匀性导致径流集中，由此引起径流流速变化及单宽流量所具有的能量增加。
The unit width runoff energy consumption increased with the flow discharge increasing but changed in parabola form. The critical slope is between 21 and 24.
坡面单宽径流能耗随流量增大而增加，随坡度变化呈抛物线趋势，临界坡度出现在21和24之间。
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