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 estimation example shows that on layer surface seepage discharge per unit width is approximates to measured value.
实例计算表明，层面的渗流单宽流量计算值和实测值很相近。
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